The most important performance of NTC negative temperature coefficient thermal sensor is life
Long-life NTC thermistor is an improvement of the understanding of NTC thermistor, emphasizing the importance of resistance life. The most important thing about an NTC thermistor is its lifespan. After withstanding various tests of high precision, high sensitivity, high reliability, ultra-high temperature, and high pressure, it still works stably for a long time.
Life is an important performance of NTC thermistor, and it has a dialectical relationship with other parameters such as precision and sensitivity. An NTC resistor product must first have a long life in order to ensure the performance of other performances; and the excellence of other performances depends on the production process reaching a certain technical level, which makes the long life of NTC possible.
Many high-tech electronic products require thermistors to perform stable temperature control and temperature measurement functions under ultra-high temperature, ultra-high pressure and other harsh conditions. Most manufacturers blindly pursue the conventional performance of NTC thermistors such as accuracy, sensitivity, and drift value. The stable performance of the resistor ignores the life of the resistor, which affects the use of electronic products due to the inability of the NTC to work for a long time. In this way, all the accuracy, sensitivity, high temperature resistance, etc., become meaningless.
NTC thermistors are divided into:
Power type NTC thermistor
Compensated NTC Thermistor
Temperature measuring NTC thermistor
Main features of NTC thermistor:
• Small Size and fast response
• High Power handling capability
• Fast response to surge current
• High material constant (B value)
• Low residual resistance
• Wide operating temperature range -55 to +200C
• R25 allowable tolerance is ±20%
• Long-term Stability and Reliability
2.5D-20 Ptc 10K Ntc ThermistorShapec Structure Picture
Can be installed into the power circuits of:
• Power supplies and inverters
• Uninterruptible Power Supplies
• Energy saving lamps
• Electronic Ballasts
• Filament Protection of various types of lamps
• Some types of heaters
• For higher power circuits ask about the MF73
and MF74 series surge suppressors.
| Material: | Synthetic Film | Power Characteristics: | Medium Power |
| Allow Tolerance: | ±10(%) | Shape: | Flat Sheet |
| Temperature Coefficient: | NTC |
| Frequency Characteristics: | Medium Frequency |
Part NO.
MF73T-1 | Res +20%
(Ω) | Max. Steady
State Current
lmax (A) | Approx. R
of MaxCurrent
Rmax (Ω) |
ø15mm Chip Diameter
Max Rated Power Pmax (W): 3.5
Dissipation Coefficient (mW/℃): ≥ 22
Thermal Time Constant (S): ≤ 75 |
| 1.3/10 | 1.3 | 10 | 0.034 |
| 1.5/10 | 1.5 | 10 | 0.036 |
| 2.5/9.5 | 2.5 | 9.5 | 0.044 |
| 5/8 | 5 | 8 | 0.058 |
| 6/7 | 6 | 7 | 0.069 |
| 7/7 | 7 | 7 | 0.078 |
| 8/7 | 8 | 7 | 0.084 |
| 10/7 | 10 | 7 | 0.098 |
| 12/6 | 12 | 6 | 0.116 |
| 15/6 | 16 | 6 | 0.129 |
| 20/6 | 20 | 6 | 0.136 |
| 30/5 | 30 | 5 | 0.165 |
| 47/4 | 47 | 4 | 0.257 |
| 120/2.5 | 120 | 2.5 | 0.652 |
Part NO.
MF73T-1 | Res +20%
(Ω) | Max. Steady
State Current
lmax (A) | Approx. R
of MaxCurrent
Rmax (Ω) |
ø20mm Chip Diameter
Max Rated Power Pmax (W): 5.0
Dissipation Coefficient (mW/℃): ≥ 28
Thermal Time Constant (S): ≤ 110 |
| 0.7/16 | 0.7 | 16 | 0.026 |
| 1/16 | 1 | 16 | 0.027 |
| 1.5/15 | 1.5 | 15 | 0.030 |
| 2/14 | 2 | 14 | 0.035 |
| 2.5/13 | 2.5 | 13 | 0.038 |
| 3/12 | 3 | 12 | 0.040 |
| 4/12 | 4 | 12 | 0.043 |
| 4.7/12 | 4.7 | 12 | 0.046 |
| 5/12 | 5 | 12 | 0.047 |
| 6/11 | 6 | 11 | 0.052 |
| 6.8/10 | 6.8 | 10 | 0.055 |
| 7/9 | 7 | 9 | 0.056 |
| 10/8 | 10 | 8 | 0.085 |
| 12/7.5 | 12 | 7.5 | 0.098 |
| 15/7 | 15 | 7 | 0.112 |
| 18/7 | 18 | 7 | 0.123 |
| 20/7 | 20 | 7 | 0.132 |
Part NO.
MF73T-1 | Res +20%
(Ω) | Max. Steady
State Current
lmax (A) | Approx. R
of MaxCurrent
Rmax (Ω) |
ø25mm Chip Diameter
Max Rated Power Pmax (W): 7.0
Dissipation Coefficient (mW/℃): ≥ 30
Thermal Time Constant (S): ≤ 130 |
| 0.5/22 | 0.5 | 22 | 0.017 |
| 0.7/22 | 0.7 | 22 | 0.017 |
| 1/20 | 1 | 20 | 0.021 |
| 1.5/19 | 1.5 | 19 | 0.024 |
| 2/18 | 2 | 18 | 0.026 |
| 2.5/16 | 2.5 | 16 | 0.029 |
| 3/15.5 | 3 | 15.5 | 0.032 |
| 4/15 | 4 | 15 | 0.039 |
| 4.7/14 | 4.7 | 14 | 0.044 |
| 5/14 | 5 | 14 | 0.047 |
| 6.8/12 | 6.8 | 12 | 0.061 |
| 7/11 | 7 | 11 | 0.064 |
| 8/10 | 8 | 10 | 0.079 |
| 10/10 | 10 | 10 | 0.084 |
| 12/9 | 12 | 9 | 0.102 |
| 15/8 | 15 | 8 | 0.117 |
| 18/8 | 18 | 8 | 0.132 |
| 20/8 | 20 | 8 | 0.132 |
Part NO.
MF73T-1 | Res +20%
(Ω) | Max. Steady
State Current
lmax (A) | Approx. R
of MaxCurrent
Rmax (Ω) |
ø30mm Chip Diameter
Max Rated Power Pmax (W): 8.0
Dissipation Coefficient (mW/℃): ≥ 40
Thermal Time Constant (S): ≤ 190 |
| 0.5/30 | 0.5 | 30 | 0.013 |
| 1/30 | 1 | 30 | 0.014 |
| 1.5/25 | 1.5 | 25 | 0.016 |
| 2/23 | 2 | 23 | 0.019 |
| 2.5/20 | 2.5 | 20 | 0.023 |
| 3/19.5 | 3 | 19.5 | 0.026 |
| 4/19 | 4 | 19 | 0.031 |
| 4.7/18 | 4.7 | 18 | 0.035 |
| 5/17 | 5 | 17 | 0.037 |
| 6.8/16 | 6.8 | 16 | 0.043 |
| 7/15 | 7 | 15 | 0.044 |
| 8/14 | 8 | 14 | 0.049 |
| 10/13 | 10 | 13 | 0.056 |
| 12/12 | 12 | 12 | 0.067 |
| 15/11 | 15 | 11 | 0.078 |
| 18/10 | 18 | 10 | 0.092 |
| 29/9 | 20 | 9 | 0.113
|
Part NO.
MF73T-1 | Res +20%
(Ω) | Max. Steady
State Current
lmax (A) | Approx. R
of MaxCurrent
Rmax (Ω) |
ø35mm Chip Diameter
Max Rated Power Pmax (W): 9.0
Dissipation Coefficient (mW/℃): ≥ 55
Thermal Time Constant (S): ≤ 280 |
| 0.5/32 | 0.5 | 32 | 0.01 |
| 1/32 | 1 | 32 | 0.011 |
| 1.5/28 | 1.5 | 28 | 0.013 |
| 2/25 | 2 | 25 | 0.017 |
| 2.5/23 | 2.5 | 23 | 0.020 |
| 3/22 | 3 | 22 | 0.023 |
| 4/21 | 4 | 21 | 0.026 |
| 4.7/20 | 4.7 | 20 | 0.029 |
| 5/19 | 5 | 19 | 0.030 |
| 6.8/18 | 6.8 | 18 | 0.035 |
| 7/17 | 7 | 17 | 0.037 |
| 8/16 | 8 | 16 | 0.041 |
| 10/15 | 10 | 15 | 0.045 |
| 12/14 | 12 | 14 | 0.051 |
| 15/13 | 15 | 13 | 0.060 |
| 18/11 | 18 | 11 | 0.072 |
| 20/10 | 20 | 10 | 0.089 |
MF72 Power NTC Thermistor
The main function of the MF72 series power NTC thermistor is to provide surge current suppression for sensitive electronics. Connecting the MF72 in series with the power supply will limit the current surge that is usually created when turning on. Once the circuit is powered on, the MF72 power NTC thermistor will quickly drop to a very low value, the power dissipation can be ignored and will not affect the normal operating current. Using the MF72 power NTC thermistor is one of the most cost-effective ways to suppress surge current and protect sensitive electronics from damage.
Applications:
• Can be installed in power circuits of:
• Power supplies and inverters
• Uninterruptible power supplies
• Energy-saving lamps
• Electronic ballasts
• Filament protection for various lamps
• Some types of heaters
• For higher power circuits compared to MF73 high power NTC thermistor
Product Features:
• Small size and fast response
• High power handling capability and long-term stability and reliability
• Fast response to surge current
• High material constant (B value)
• Low residual resistance
• Wide operating temperature range -55 to + 200C
• R25 tolerance of ±20%
Specifications and dimensions:
Specifications:
| DMAX | Dmax | Tmax | d | F1 | F2 | Straight Leads | Bend Leads |
| | | ±0.05 | ±1 | ±1.5 | Lmin | Lmin | L2±2 |
| MF72□D5 | 7 | 5 | 0.6 / 0.45 | 5 / 2.5 | 3 | 25 | 17/5.0 | 8/5.0 |
| MF72□D7 | 9 | 5 | 0.6 | 5 | 3 | 25 | 17/5.0 | 8/5.0 |
| MF72□D9 | 11 | 5.5 | 0.8 / 0.6 | 7.5 / 5 | 5/3 | 25 | 17/5.0 | 8/5.0 |
| MF72□D11 | 13 | 5.5 | 0.8 | 7.5 / 5 | 5/3 | 25 | 17/5.0 | 8/5.0 |
| MF72□D13 | 15.5 | 6 | 0.8 | 7.5 | 5 | 25 | 17/5.0 | 8/5.0 |
| MF72□D15 | 17.5 | 6 | 0.8 | 10 / 7.5 | 5 | 25 | 17/5.0 | 8/5.0 |
| MF72□D20 | 22.5 | 7 | 1 | 10 / 7.5 | / | 25 | / | / |
| MF72□D25 | 27.5 | 8 | 1 | 10 / 7.5 | / | 25 | / | / |
Main technical parameters:
| D-5 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 3D-5 | 3 | 1.3 | 0.177 | 7 | 16 | -40〜+ 150 | |
| 5D-5 | 5 | 1 | 0.353 | 7 | 16 | -40〜+ 150 | √ |
| 10D-5 | 10 | 0.7 | 0.771 | 7 | 16 | -40〜+ 150 | √ |
| 20D-5 | 20 | 0.5 | 1.154 | 6 | 17 | -40〜+ 150 | |
| 60D-5 | 60 | 0.3 | 1.878 | 6 | 17 | -40〜+ 150 | |
| 200D-5 | 200 | 0.1 | 18.7 | 5 | 17 | -40〜+ 150 | √ |
| D-7 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 2.5D-7 | 2.5 | 3 | 0.132 | 11 | 27 | -40〜+ 150 | |
| 3D-7 | 3 | 2.5 | 0.145 | 11 | 27 | -40〜+ 150 | |
| 5D-7 | 5 | 2 | 0.283 | 9 | 23 | -40〜+ 150 | √ |
| 8D-7 | 8 | 1 | 0.539 | 9 | 28 | -40〜+ 150 | √ |
| 10D-7 | 10 | 1 | 0.616 | 9 | 23 | -40〜+ 150 | √ |
| 12D-7 | 12 | 1 | 0.816 | 9 | 23 | -40〜+ 150 | |
| 16D-7 | 16 | 0.7 | 1.003 | 8 | 23 | -40〜+ 150 | √ |
| 22D-7 | 22 | 0.6 | 1.108 | 8 | 23 | -40〜+ 150 | √ |
| 33D-7 | 33 | 0.5 | 1.485 | 8 | 23 | -40〜+ 150 | √ |
| 200D-7 | 200 | 0.2 | 11.65 | 7 | 21 | -40〜+ 150 | √ |
| D-9 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 1.5D-9 | 1.5 | 5 | 0.3 | 11 | 36 | -40〜+ 170 | |
| 2.5D-9 | 2.5 | 4.5 | 0.06 | 11 | 36 | -40〜+ 170 | |
| 3D-9 | 3 | 4 | 0.12 | 11 | 35 | -40〜+ 170 | √ |
| 4D-9 | 4 | 3 | 0.19 | 11 | 35 | -40〜+ 170 | √ |
| 5D-9 | 5 | 3 | 0.21 | 11 | 34 | -40〜+ 170 | √ |
| 6D-9 | 6 | 2 | 0.315 | 11 | 34 | -40〜+ 170 | √ |
| 8D-9 | 8 | 2 | 0.4 | 11 | 32 | -40〜+ 170 | √ |
| 10D-9 | 10 | 2 | 0.458 | 11 | 32 | -40〜+ 170 | √ |
| 12D-9 | 12 | 1 | 0.652 | 11 | 32 | -40〜+ 170 | √ |
| 16D-9 | 16 | 1 | 0.802 | 11 | 31 | -40〜+ 170 | √ |
| 20D-9 | 20 | 1 | 0.864 | 11 | 30 | -40〜+ 170 | √ |
| 22D-9 | 22 | 1 | 0.95 | 11 | 30 | -40〜+ 170 | √ |
| 30D-9 | 30 | 1 | 1.022 | 11 | 30 | -40〜+ 170 | √ |
| 33D-9 | 33 | 1 | 1.124 | 11 | 30 | -40〜+ 170 | √ |
| 50D-9 | 50 | 1 | 1.252 | 11 | 30 | -40〜+ 170 | √ |
| 100D-9 | 100 | 0.7 | 1.356 | 11 | 28 | -40〜+ 170 | |
| 200D-9 | 200 | 0.5 | 1.485 | 10 | 28 | -40〜+ 170 | |
| 400D-9 | 400 | 0.2 | 1.652 | 9 | 25 | -40〜+ 170 | |
| D-11 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 1D-11 | 1 | 5.5 | 0.07 | 13 | 46 | -40〜+ 170 | |
| 1.5D-11 | 1.5 | 5.5 | 0.085 | 13 | 46 | -40〜+ 170 | |
| 2.5D-11 | 2.5 | 5 | 0.095 | 13 | 43 | -40〜+ 170 | √ |
| 3D-11 | 3 | 5 | 0.1 | 13 | 43 | -40〜+ 170 | √ |
| 4D-11 | 4 | 4 | 0.15 | 13 | 44 | -40〜+ 170 | √ |
| 5D-11 | 5 | 4 | 0.156 | 13 | 45 | -40〜+ 170 | √ |
| 6D-11 | 6 | 3 | 0.24 | 13 | 45 | -40〜+ 170 | √ |
| 8D-11 | 8 | 3 | 0.255 | 14 | 47 | -40〜+ 170 | √ |
| 10D-11 | 10 | 3 | 0.275 | 14 | 47 | -40〜+ 170 | √ |
| 12D-11 | 12 | 2 | 0.462 | 14 | 48 | -40〜+ 170 | √ |
| 16D-11 | 16 | 2 | 0.47 | 14 | 50 | -40〜+ 170 | √ |
| 20D-11 | 20 | 2 | 0.512 | 15 | 52 | -40〜+ 170 | √ |
| 22D-11 | 22 | 2 | 0.563 | 15 | 52 | -40〜+ 170 | √ |
| 30D-11 | 30 | 1.5 | 0.667 | 15 | 52 | -40〜+ 170 | √ |
| 33D-11 | 33 | 1.5 | 0.734 | 15 | 52 | -40〜+ 170 | √ |
| 50D-11 | 50 | 1.5 | 1.021 | 15 | 52 | -40〜+ 170 | √ |
| 60D-11 | 60 | 1.5 | 1.215 | 15 | 52 | -40〜+ 170 | √ |
| 80D-11 | 80 | 1.2 | 1.656 | 15 | 52 | -40〜+ 170 | √ |
| D-13 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 1.3D-13 | 1.3 | 7 | 0.062 | 13 | 60 | -40〜+ 200 | √ |
| 1.5D-13 | 1.5 | 7 | 0.073 | 13 | 60 | 40〜+ 200 | √ |
| 2.5D-13 | 2.5 | 6 | 0.088 | 13 | 60 | 40〜+ 200 | √ |
| 3D-13 | 3 | 6 | 0.092 | 14 | 60 | 40〜+ 200 | √ |
| 4D-13 | 4 | 5 | 0.12 | 15 | 67 | 40〜+ 200 | √ |
| 5D-13 | 5 | 5 | 0.125 | 15 | 68 | 40〜+ 200 | √ |
| 6D-13 | 6 | 4 | 0.17 | 15 | 65 | 40〜+ 200 | √ |
| 7D-13 | 7 | 4 | 0.188 | 15 | 65 | 40〜+ 200 | √ |
| 8D-13 | 8 | 4 | 0.194 | 15 | 60 | 40〜+ 200 | √ |
| 10D-13 | 10 | 4 | 0.206 | 15 | 65 | 40〜+ 200 | √ |
| 12D-13 | 12 | 3 | 0.316 | 16 | 65 | 40〜+ 200 | √ |
| 15D-13 | 15 | 3 | 0.335 | 16 | 60 | 40〜+ 200 | √ |
| 16D-13 | 16 | 3 | 0.338 | 16 | 60 | 40〜+ 200 | √ |
| 20D-13 | 20 | 3 | 0.372 | 16 | 65 | 40〜+ 200 | √ |
| 30D-13 | 30 | 2.5 | 0.517 | 16 | 65 | 40〜+ 200 | √ |
| 47D-13 | 47 | 2 | 0.81 | 17 | 65 | 40〜+ 200 | √ |
| 120D-13 | 120 | 1.2 | 2.124 | 17 | 65 | 40〜+ 200 | √ |
| D-15 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 1.3D-15 | 1.3 | 8 | 0.048 | 18 | 68 | -40〜+ 200 | √ |
| 1.5D-15 | 1.5 | 8 | 0.052 | 18 | 69 | -40〜+ 200 | √ |
| 2.5D-15 | 2.5 | 7 | 0.065 | 18 | 76 | -40〜+ 200 | √ |
| 3D-15 | 3 | 7 | 0.075 | 18 | 76 | -40〜+ 200 | √ |
| 5D-15 | 5 | 6 | 0.112 | 20 | 76 | -40〜+ 200 | √ |
| 6D-15 | 6 | 5 | 0.155 | 20 | 80 | -40〜+ 200 | √ |
| 7D-15 | 7 | 5 | 0.173 | 20 | 80 | -40〜+ 200 | √ |
| 8D-15 | 8 | 5 | 0.178 | 20 | 80 | -40〜+ 200 | √ |
| 10D-15 | 10 | 5 | 0.18 | 20 | 75 | -40〜+ 200 | √ |
| 12D-15 | 12 | 4 | 0.25 | 20 | 75 | -40〜+ 200 | √ |
| 15D-15 | 15 | 4 | 0.268 | 21 | 85 | -40〜+ 200 | √ |
| 16D-15 | 16 | 1 | 0.276 | 21 | 70 | -40〜+ 200 | √ |
| 20D-15 | 20 | 4 | 0.288 | 21 | 86 | -40〜+ 200 | √ |
| 30D-15 | 30 | 3.5 | 0.438 | 21 | 75 | -40〜+ 200 | √ |
| 47D-15 | 47 | 3 | 0.68 | 21 | 86 | -40〜+ 200 | √ |
| 120D-15 | 120 | 1.8 | 1.652 | 22 | 87 | -40〜+ 200 | √ |
| 220D-15 | 220 | 1 | 2.0358 | 24 | 90 | -40〜+ 20 | |
| D-20 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 0.7D-20 | 7 | 11 | 0.018 | 27 | 89 | -40〜+ 200 | √ |
| 1D-20 | 1 | 10 | 0.023 | 27 | 89 | -40〜+ 200 | |
| 1.3D-20 | 1.3 | 9 | 0.037 | 27 | 88 | -40〜+ 200 | √ |
| 3D-20 | 3 | 8 | 0.055 | 25 | 88 | -40〜+ 200 | √ |
| 5D-20 | 5 | 7 | 0.087 | 25 | 87 | -40〜+ 200 | √ |
| 6D-20 | 6 | 6 | 0.113 | 25 | 103 | -40〜+ 200 | √ |
| 8D-20 | 8 | 6 | 0.142 | 25 | 105 | -40〜+ 200 | √ |
| 10D-20 | 10 | 6 | 0.162 | 24 | 102 | -40〜+ 200 | √ |
| 12D-20 | 12 | 5 | 0.195 | 24 | 100 | -40〜+ 200 | √ |
| 16D-20 | 16 | 5 | 0.212 | 24 | 100 | -40〜+ 200 | √ |
| 20D-20 | 20 | 4.5 | 0.345 | 23 | 115 | -40〜+ 200 | |
| 30D-20 | 30 | 4 | 0.492 | 23 | 115 | -40〜+ 200 | |
| 47D-20 | 47 | 3.5 | 0.675 | 23 | 120 | -40〜+ 200 | |
| D-25 NTC Thermistor |
| Part Number MF72 NTC | R25 (Ω) | Max steady-state current(A) | Approximate resistance value at maximum current Ω) | Dissipation coefficient approx. (MW /℃) | Thermal time constant approx. (S) | Operating temperature (°C) | UL |
| 0.7D-25 | 0.7 | 12 | 0.014 | 30 | 120 | -40〜+ 200 | |
| 1.5D-25 | 1.5 | 10 | 0.027 | 30 | 121 | -40〜+ 200 | |
| 3D-25 | 3 | 9 | 0.044 | 32 | 124 | -40〜+ 200 | |
| 5D-25 | 5 | 8 | 0.07 | 32 | 125 | -40〜+ 200 | |
| 8D-25 | 8 | 7 | 0.114 | 33 | 125 | -40〜+ 200 | |
| 10D-25 | 10 | 7 | 0.13 | 32 | 127 | -40〜+ 200 | |
| 12D-25 | 12 | 6 | 0.156 | 32 | 126 | -40〜+ 200 | |
| 16D-25 | 16 | 6 | 0.16 | 35 | 126 | -40〜+ 200 | |
| 20D-25 | 20 | 4.5 | 0.184 | 35 | 126 | -40〜+ 200 | |
Note: Multiple resistance values and pin types can be customized on demand.
What is an inrush current suppression power type NTC thermistor
A power NTC thermistor can be a cost-effective device for limiting the amount of inrush current in a switching power supply or other equipment when power is first applied. A power NTC thermistor limits inrush current by acting as a power resistor that drops from a high cold resistance to a low hot resistance when heated by the current flowing through it.
The inrush current limiter supplies the NTC thermistor protection circuit with unnecessarily high current, suppressing high inrush current surges while its resistance remains negligible during continuous operation. Due to its low resistance in the operating state, power thermistors dissipate much less power than fixed resistors commonly used in this application.
Application of Inrush Current Suppression Power Type NTC Thermistor
Limiting inrush current, suitable for protection of switching power supplies, UPS power supplies, transformers, motors, various electric heating appliances, energy-saving lamps, ballasts, various power circuits, amplifiers, color displays, monitors, color TVs, filament protection, etc.
Power thermistor elements can also be used for soft starting of motors, for example, in vacuum cleaners with a continuous current of up to 20 A.
Inrush current suppression power type NTC thermistor advantages:
· Low-cost solid-state device for suppressing inrush current.
· Minimizes line current distortion and radio noise.
· Protects switches, rectifier diodes and smoothing capacitors from premature failure.
· Prevents false fuse blowing.
Inrush current suppression power type NTC thermistor features:
· Resin coated disc thermistor with non-insulated leads.
· Suitable for AC and DC circuits up to 265 V (rms).
· Wide range of resistances, currents and sizes.
· Excellent mechanical strength.
· Suitable for PCB mounting.
Several factors to consider when selecting an inrush current suppression power NTC thermistor
1) Maximum operating current > actual operating current in the power circuit
2) At 25°C
Rated zero power resistance, E: loop voltage, Im: surge current
For conversion power, recovery power, switching power, UPS power, Im = 100 times the operating current For filaments, heaters, Im = 30 times the operating current
3) The larger the B value, the smaller the residual resistance and the lower the operating temperature.
4) Generally speaking, the larger the time constant and dissipation coefficient, the larger the NTC thermal capacity, and the stronger the surge current suppression capability of the NTC thermistor.
Inrush Current Suppression Power Type NTC Thermistor Application Notes
1) For inrush current limiting, the NTC thermistor must be connected in series with the load circuit. Several inrush current limiters can also be connected in series for higher damping. Inrush current limiters must not be connected in parallel.
2) Generally, inrush current limiters need time to return to a cold state, where they can provide adequate inrush current limiting due to their high resistance. The cooling time depends on the ambient conditions.
3) It should be taken into account that the surrounding area of the NTC thermistor may become hot. Make sure that adjacent components are kept at a sufficient distance from the thermistor to ensure a proper cooling time for the thermistor.
4) Make sure that the design operating temperature of the adjacent materials is comparable to the surface temperature of the thermistor. Make sure that the surrounding components and materials can withstand this temperature.
5) Ensure that the thermistor is adequately ventilated to avoid overheating.
6) Avoid contamination of the thermistor surface.
7) Avoid contact of the NTC thermistor with any liquids and solvents. M
| Because the thermistor is basically customized products, the price of goods is not the original price, the price is subject to the formal quotation. |
| Features | RoHS compliant |
| Halogen-Free (HF) series are available |
| Body size: Ф5mm |
| Radial lead resin coated |
| Operating temperature range: -30℃~+125℃ |
| Wide resistance range |
| Cost effective |
| Recommended Applications | Home appliances;Automotive electronics; Computers;Switch mode power supplies;Adapters |
| Storage Conditions | Storage Temperature: -10℃~+40℃ |
| Relative Humidity: ≦75%RH |
| Keep away from corrosive atmosphere and sunlight. |
| Period of Storage | 1 year |
Product parameters
| P/N | R@25℃ | Tolerance(%) | Beta Value | Tolerance(%) |
| MF11-050 | 5 | ±5 ±10 ±20 | 2400 | ±5 ±10 |
| MF11-100 | 10 | 2800 |
| MF11-150 | 15 | 2800 |
| MF11-200 | 20 | 2800 |
| MF11-220 | 22 | 2800 |
| MF11-270 | 27 | 3000 |
| MF11-330 | 33 | 3000 |
| MF11-390 | 39 | 3000 |
| MF11-470 | 47 | 3100 |
| MF11-500 | 50 | 3100 |
| MF11-680 | 68 | 3100 |
| MF11-820 | 82 | 3100 |
| MF11-101 | 100 | 3200 |
| MF11-121 | 120 | 3200 |
| MF11-151 | 150 | 3200 |
| MF11-201 | 200 | 3200 |
| MF11-221 | 220 | 3500 |
| MF11-271 | 270 | 3500 |
| MF11-331 | 330 | 3500 |
| MF11-391 | 390 | 3500 |
| MF11-471 | 470 | 3500 |
| MF11-501 | 500 | 3500 |
| MF11-561 | 560 | 3500 |
| MF11-681 | 680 | 3800 |
| MF11-821 | 820 | 3800 |
| MF11-102 | 1000 | 3800 |
| MF11-122 | 1200 | 3800 |
| MF11-152 | 1500 | 3800 |
| MF11-202 | 2000 | 4000 |
| MF11-222 | 2200 | 4000 |
| MF11-272 | 2700 | 4000 |
| MF11-302 | 3000 | 4000 |
| MF11-332 | 3300 | 4000 |
| MF11-392 | 3900 | 4000 |
| MF11-472 | 4700 | 4050 |
| MF11-502 | 5000 | 4050 |
| MF11-562 | 5600 | 4050 |
| MF11-682 | 6800 | 4050 |
| MF11-822 | 8200 | 4050 |
| MF11-103 | 10000 | 4050 |
| MF11-123 | 12000 | 4050 |
| MF11-153 | 15000 | 4150 |
| MF11-203 | 20000 | 4300 |
| MF11-303 | 30000 | 4300 |
| MF11-473 | 47000 | 4300 |
| MF11-503 | 50000 | 4300 |
| MF11-683 | 68000 | 4300 |
| MF11-104 | 100000 | 4500 |
| MF11-124 | 120000 | 4700 |
| MF11-154 | 150000 | 4700 |
| MF11-204 | 200000 | 4700 |
| MF11-304 | 300000 | 4700 |
| MF11-504 | 500000 | 4800 |
| MF11-105 | 1000000 | 4900 |
Negative temperature coefficient thermistor, also known as NTC thermistor, is a kind of sensor resistance whose resistance value decreases with the increase of temperature. Widely used in various electronic components, such as temperature sensors, resettable fuses and self-adjusting heaters, etc.
The matters needing attention in the use of NTC are as follows
1. Be sure to add a suitable series resistor, otherwise the thermal collapse will occur when the NTC is in use, because the current flowing through the NTC will generate heat, if the heat cannot be dissipated in time, the temperature of the NTC will rise, and then the resistance will drop, at this time The current will increase significantly, and the NTC will get hotter, so that cycling can eventually cause the NTC to burn out, or even catch fire.
2. The end electrode of NTC is usually composed of Ag, and silver migration will occur when it is used improperly, resulting in short circuit of NTC. Avoid NTC contact with water during use.
3. The high temperature during welding will cause the irreversible resistance drift of NTC. In some cases, it may cause a 5% drift, so try to avoid high temperature welding.
Features
Focus on R&D and manufacturing of NTC thermistors and temperature sensors
High Power NTC Thermistor MF73T Series
● Small size, high power, strong ability to suppress surge current.
● Large material constant (B value), small residual resistance and low power consumption.
● High current, long life, high reliability.
● Easy to install on circuit boards, complete series and wide application range.
Application·Scope
High Power NTC Thermistor MF73T Series
Thanks to peers, win-win future
High-power switching power supply, conversion power supply, UPS power supply.
High-power power battery charger, electric vehicle charger.
High-power LED lamps, high-power electronic energy-saving lamps and other lighting fixtures.
Product Description:
Power NTC Thermistor is a MF73T series negative temperature coefficient (NTC) thermistor from MF72, developed for Inrush Current Suppression. The product features small size and strong power with current rating up to Imax of 40A. It works in wide operating temperature range from -40°C to +200°C, making it an ideal choice for electronic applications.
Features:
- Product Name: Power NTC Thermistor
- Application: Electronic
- Lead Wire Material: Copper Wire
- Feature: Small Size, Strong Power
- Resistance Range (25℃): 0.2Ω ～400Ω
- Terminal Type: Radial
- Specific Type: MF72 power type negative temperature coefficient thermistor
- Function: MF72 power type thermistor for overcurrent protection
- Application: Overcurrent Protection NTC Thermistor
Technical Parameters:
| Property | Value |
| Imax (A) | 40A |
| Feature | Small Size, Strong Power |
| Tolerance | ±20% |
| Application | Electronic |
| Operating Temperature Range | -40°C To +200°C |
| Usage | Surge Current Protection |
| Resistance Range (25℃) | 0.2Ω ～400Ω |
| Lead Wire Material | Copper Wire |
| Terminal Type | Radial |
| Product Name | MF73T Series NTC Thermistor |
Applications:
LIN KUN's MF73T Series High Power NTC Thermistor is a negative temperature coefficient (NTC) thermistor for high current applications. It is specifically designed for overcurrent protection and provides reliable overcurrent protection with 40A maximum current. The product features a small size and strong power, and is certified by RoHS and UL. The product has a radial terminal type and is made with copper wire lead material. It is available in 500PCS/Bag and requires a minimum order quantity of 500PCS. The delivery time is 5-7 days. Payment terms include D/P, T/T, Paypal, and Western Union. The supply ability is 1000000PCS/Month. This product is ideal for electronic applications.
Customization:
LIN KUN High Power NTC Thermistor MF73T Series Brand Name: LIN KUN
Model Number: High Power NTC Thermistor MF73T Series
Place of Origin: China
Certification: RoHS UL
Minimum Order Quantity: 500 PCS
Price: Negotiable
Packaging Details: 500PCS/Bag
Delivery Time: 5-7 Days
Payment Terms: D/P, T/T, Paypal, Western Union
Supply Ability: 1000000PCS/Month
Imax(A): 40A
Lead Wire Material: Copper Wire
Feature: Small Size, Strong Power
Usage: Overcurrent Protection NTC Thermistor, MF72 power type negative temperature coefficient thermistor, MF72 power type NTC thermistor, High Power NTC Thermistor
Resistance Range(25℃): 0.2Ω ～400Ω
Support and Services:
Power NTC Thermistor Technical Support and Service
We provide reliable technical support and service for the Power NTC Thermistor product. Our technical support team is available for help with any questions or issues you may have. Our team of professionals can provide troubleshooting, installation, and maintenance services. We also offer extended warranties and can provide replacement parts or devices for any malfunction or damage.
We strive to be the leader in customer service and technical support. We provide fast and reliable assistance to ensure that our customers get the most out of their Power NTC Thermistor product. Our team of experts is available to answer any questions you have and provide assistance with setup and use. We are committed to providing the highest quality service and support.
Packing and Shipping:
Power NTC Thermistor is packaged and shipped using the following process:
- The thermistor is inspected for defects and quality assurance.
- The thermistor is carefully placed in an antistatic bag.
- The bag is sealed and labeled for easy identification.
- The bag is placed in a shipping box filled with protective material.
- The box is labeled with the thermistor's shipping information.
- The box is sealed with tape and shipped to the customer.
FAQ:
Power NTC Thermistor FAQs
A1: The brand name of the Power NTC Thermistor is LIN KUN.
A2: The model number of the Power NTC Thermistor is High Power NTC Thermistor MF73T Series.
A3: The Power NTC Thermistor is made in China.
A4: The Power NTC Thermistor has RoHS UL certifications.
A5: The minimum order quantity of the Power NTC Thermistor is 500 PCS.
