Product Overview
The MF72 Series Power NTC Thermistor from Nanjing Shiheng Electronics Co., Ltd. is designed for current limiting applications. It features a silicone resin encapsulation, offering high temperature resistance (up to 300C), rapid heat dissipation, and good insulation. This thermistor is suitable for applications requiring surge current suppression.
Product Attributes
- Brand: Shiheng
- Product Type: Power NTC Thermistor
- Series: MF72
- Encapsulation Material: Green Silicone Resin
- Certifications: ISO9001:2015, IATF16949:2016, ISO14001:2015, RoHS 2.0, CQC (CQC04001010556), TUV (R50245892), High-tech product in Jiangsu Province, UL (E241319)
- Origin: Nanjing, China
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Requirements | |||
|---|---|---|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5 (Test Power 0.1mW, in air) | 2.5 20% | ||||
| B-value (B25/50) | B | Ta=250.01, Tb=500.01 | K | 2600 10% | |||
| Max steady current | I max | A | 5 | ||||
| Max allowable capacity value | CT | 240Vac | F | 470 | |||
| Thermal dissipation Coefficient | In still air | mW/ | 13 | ||||
| Thermal time constant | In still air | sec | 43 | ||||
| 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 | ||||
| Model: MF72 2.5D11 | Dimensions (mm): | D | L1 | L2 | F0.5 | Tmax | d0.05 |
| 12 | 3.50.5 | 52 | 7.5 | 5.5 | 0.8 | ||
| Technical Requirements: | Zero Power Resistance: R25: 2.520%; B25/50 value: 2600K10%; Lead wire: Tinned copper-weld steel wire; Encapsulation: Green silicon resin; Compliant with RoHS environmental requirements. | ||||||
Installation & Use Precautions
- Purpose: Current limitation.
- Soldering: Weld spot at least 2mm from encapsulation head, temperature below 360, time < 3 seconds.
- Storage Temperature: -1040.
- Storage Humidity: 75% RH.
- Avoid storage in environments with corrosive gases and illumination.
- Reseal packaging after opening. Storage period is 1 year. Products exceeding the storage period can be re-tested and used if they meet the requirements.
Material Description
The silicone resin encapsulation provides high temperature resistance (up to 300C), fast heat dissipation, and good insulation. While the silicone surface may show friction marks due to product handling (which do not affect performance and can be wiped off), and the material is firm but brittle, leading to potential minor cracks/chipping at the leads under improper force (which also do not affect performance or reliability), customers can use the product with confidence as these characteristics do not impact performance.
2410121635_Nanjing-Shiheng-Elec-MF72-2-5D11-3-5_C18197900.pdf
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