Power NTC Thermistor - MF72 Series
Product Overview
The MF72 Series Power NTC Thermistors are designed for current limiting applications, effectively suppressing inrush current. Manufactured by Nanjing Shiheng Electronics Co., Ltd., these thermistors utilize a silicone resin encapsulation for excellent high-temperature resistance (up to 300C), rapid heat dissipation, and good insulation. The rough surface of the silicone resin aids in heat dissipation and may exhibit minor friction marks from handling, which do not affect performance. While the material is firm, it is also brittle; improper handling can lead to minor cracks or chips at the lead pins, which have been tested and proven not to impact the product's performance or reliability. These thermistors are suitable for various industrial applications requiring protection against current surges.
Product Attributes
- Brand: Shiheng
- Origin: Nanjing, China
- Encapsulation Material: Green Silicone Resin
- Certifications: ISO9001:2015, IATF16949:2016, ISO14001:2015, RoHS 2.0, CQC (CQC04001010556), TUV (R50245892), UL (E241319), Jiangsu Province High-tech Product
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Performance Requirements |
|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5 (Test Power 0.1mW, in air) | 5 20% | |
| B-value | B25/50 | Ta=250.01, Tb=500.01 | K | 2800 10% |
| Max steady current | I max | A | 4 | |
| Max allowable capacity value | CT | 240Vac | F | 330 |
| Thermal dissipation Coefficient | In still air | mW/ | 13 | |
| Thermal time constant | In still air | sec | 45 | |
| Withstand voltage | 500V/AC, 1min | No breakthrough and flash over | ||
| Insulation resistance | 500V/DC, 1min | M | 500 | |
| Operating temperature range | -40 ~ 170 | |||
| Maximum rated power | Pmax | W | 3 | |
| Dimensions (DMax x L1 x L2 x Tmax x d) | mm | 12 x 3.50.5 x 52 x 7.5 x 5.5 (lead diameter d0.05: 0.8) | ||
| Lead wire material | Tinned copper-weld steel wire |
Installation & Use Precautions
- Purpose: Current limitation.
- Soldering: Weld spot at least 2mm from the encapsulation head. Temperature below 360, time < 3 seconds.
- Storage Temperature: -10 ~ 40.
- Storage Humidity: 75% RH.
- Storage Environment: Avoid corrosive gases and direct illumination.
- Shelf Life: 1 year after opening. Re-inspection is recommended for products exceeding the shelf life.
2410121635_Nanjing-Shiheng-Elec-MF72-5D11-3-5_C18197901.pdf
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