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Shiheng Disc Power NTC Thermistor MF72 1.5D-5 10D13 16D11 5D15 10D20
Description Of The Shiheng Disc Power NTC Thermistor MF72
When we turn on an electrical equipment, the surge current can be restrained by a power NTC termistor connected in series with the power circuit. Because of the continuing action of current,temperature of power NTC thermistor raising, the resistance will rapidly drop to a small value, the consumed power can be ignored. So it can't affect normal operating current. Therefore, using power NTC thermistor is a most effectively and most brief measure to restrain surge current, protecting electrical equipment from destruction.
Applications Of The Shiheng Disc Power NTC Thermistor MF72
* Coversion power-supply, switch power-supply, ups power-supply
* Electronic energy saving lamps, electronic ballast and all kinds
of electric heater
* All kinds of RT, display
* Bulb and other lighting products
* UPS power supply, USB terminal block, power adapter, LED
light, lighting fixture, lighting distribution box, ballast
Characteristics Of The Shiheng Disc Power NTC Thermistor MF72
Small size, strong power and strong capability of surge current
protection.
Fast response to surge current
Big material constant (B value), Small remain resistance
Long life and high reliability
Wide operating range
Dimensions Of The Shiheng Disc Power NTC Thermistor MF72 (mm)
Part No Dim(mm) Sym | D max | T max | d ±0.05 | F1±1 | Straight lead | Kinked lead | |
| Lmin | L1min | L2±2 | |||||
| MF72□D5 | 7 | 5 | 0.6/0.45 | 5 | 25 | 17/5 | 5 |
| MF72□D7 | 9 | 5 | 0.6 | 5 | 25 | 17/5 | 5 |
| MF72□D9 | 11 | 5.5 | 0.8/0.6 | 7.5 | 25 | 17/5 | 5 |
| MF72□D11 | 13 | 5.5 | 0.8 | 7.5 | 25 | 17/5 | 5 |
| MF72□D13 | 15.5 | 6 | 0.8 | 7.5 | 25 | 17/5 | 5 |
| MF72□D15 | 17.5 | 6 | 0.8 | 7.5 | 25 | 17/5 | 5 |
| MF72□D20 | 22.5 | 7 | 1.0 | 10 | 25 | / | / |
| MF72□D25 | 27.5 | 8 | 1.0 | 10 | 25 | / | / |
Technial Parameters Of The Shiheng Disc Power NTC Thermistor MF72
Part No MF72
| Max Steady State Current(A) | Approx.R of Max.Cur.(Ω ) | Operating Temp.(℃ ) | Maxsurge capacity (UF)240V/AC |
| D5 | 0.1~1 | 0.353~18.70 | -140 ±150 | 47~100 |
| D7 | 0.2~2 | 0.283~11.65 | -140 ±150 | 68~150 |
| D9 | 0.2~4 | 0.120~30.30 | -140 ±170 | 47~220 |
| D11 | 1.2~5 | 0.095~1.656 | -140 ±170 | 150~470 |
| D13 | 1.2~7 | 0.062~2.124 | -140 ±200 | 220~560 |
| D15 | 1.8~8 | 0.075~1.652 | -140 ±200 | 330~680 |
| D20 | 5~11 | 0.018~0.212 | -140 ±200 | 680~1000 |
| D25 | 6~12 | 0.014~0.160 | -140 ±200 | 820~1200 |
How does NTC thermistor work?
Thermistor uses the characteristic that the resistance value of a semiconductor changes with temperature
to form a thermal element. Within a certain temperature range, according to the change of the measured
thermistor value, the temperature change of the measured medium can be known. When the temperature
changes are the same, the resistance of the thermistor changes about 10 times that of the lead thermal resistance.
Because the conduction mode of semiconductors is carrier conduction, this forms the temperature characteristics
of semiconductors. Since the number of carriers in a semiconductor is far fewer than the free electrons in a metal,
its resistivity becomes larger. As the temperature increases, the number of carriers participating in conduction in the
semiconductor increases, the conductivity will increase, and the resistivity will also decrease.
