MF74 Ultra-high Power NTC Thermistor Series
| Item No : | MF74 |
| Zero‑Power Resistance Value(Ω) @25℃ : | 0.5~30 Ω |
| B Value 25/50 (K) : | 2400~3200 K |
| Max Steady Current : | 12~40 A |
| Temperature Range : | -55~200 ℃ |
| Max Allowable Capacity Value : | 680~4700 μF |
| Thermal Dissipation Coefficient : | 118~125 mW/℃ |
| Thermal Time Constant : | 340~350 s |
| Insulation Resistance : | ≥500 MΩ |
| Withstand Voltage : | No breakthrough and flash over |
PRODUCT INTRODUCTION
Product Description
Power type NTC suppresses the surge current at startup. Its zero-power resistance value suppresses the surge current at the moment of startup so that the surge current at the moment of startup will not be too large.
Product Features
1. Application scope:
- Conversion power supply, switching power supply, UPS power supply.
- Various high‑power lighting fixtures.
- Electric heaters.
2. Features:
- Reliable structure and easy installation.
- Strong ability to suppress surge current.
- The working steady‑state current is large.
- Can continue to work under larger steady‑state current.
3. Installation method:
- a) For use, the resistor chip is installed into a cylindrical porcelain shell, and the two ends are led out with copper screw caps.
- b) For vibration and impact tests, the upper and lower copper screw caps are fixed.
| Dim (mm) | DMAX | TMAX | d±0.05 | F1±1 | Straight lead LMIN |
Curved lead | |
|---|---|---|---|---|---|---|---|
| L1MIN | L2±2 | ||||||
| MF72 D5 | 6 | 5 | 0.45/0.6 | 5/2.5 | 25 | 20/5 | 5 |
| MF72 D7 | 8 | 5 | 0.6 | 5 | 25 | 20/5 | 5 |
| MF72 D9 | 10 | 5.5 | 0.8/0.6 | 7.5/5 | 25 | 20/5 | 5 |
| MF72 D11 | 12 | 5.5 | 0.8 | 7.5/5 | 25 | 20/5 | 5 |
| MF72 D13 | 14 | 6 | 0.8 | 7.5/5 | 25 | 20/5 | 5 |
| MF72 D15 | 17.5 | 6 | 0.8 | 10/7.5 | 25 | 20/5 | 5 |
| MF72 D20 | 21 | 7 | 1.0 | 10/7.5 | 25 | / | / |
| MF72 D25 | 27.5 | 8 | 1.0 | 10/7.5 | 25 | / | / |