Power NTC Thermistor Nanjing Shiheng Elec MF72 5D13-3.5 Offering Current Limiting and Thermal Performance
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Product Description
Product Overview
The MF72 Series Power NTC Thermistor from Nanjing Shiheng Electronics Co., Ltd. is designed for current limiting applications. It features a high temperature resistance of over 300, fast heat dissipation, and excellent insulation properties, making it an optimal choice for power NTC thermistors. The thermistor is encapsulated in green silicone resin, offering robust protection while ensuring efficient thermal performance. Despite potential surface friction marks and minor cracks at the lead pins due to material properties and handling, these do not affect the product's performance or reliability.
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), UL (E241319), High-tech product certificate in Jiangsu Province
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Requirements |
|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5 (Test Power 0.1mW, in air) | 520% | |
| B-value | B25/50 | Ta=250.01, Tb=500.01 | K | 280010% |
| Max steady current | I max | A | 5 | |
| Max allowable capacity value | CT | 240Vac | F | 560 |
| Thermal dissipation Coefficient | In still air | mW/ | 15 | |
| Thermal time constant | In still air | sec | 68 | |
| Withstand voltage | 500V/AC 1min | No breakthrough and flash over | ||
| Insulation resistance | 500V/DC 1min | M | 500 | |
| Operating temperature range | -40 ~ 200 | |||
| Maximum rated power | Pmax | W | 4 | |
| Model: MF72 5D13 | ||||
| Dimensions (mm): | D | Max 14 | ||
| L1 | 3.50.5 | |||
| L2 | 5 | |||
| F0.5 | 7.5 | |||
| T max | 6.0 | |||
| d0.05 | 0.8 | |||
| Technical Requirements: | ||||
| Zero Power Resistance: R25 | 520% | |||
| B-value: B25/50 | 2800K10% | |||
| Lead wire material | Tinned copper clad steel wire | |||
| Environmental requirement | RoHS |
Reliability
| Item | Test Standard | Test Conditions and Methods | Requirements |
|---|---|---|---|
| Terminal strength | IEC60068-2-21 | Lead diameter(mm): 0.5<d0.8, Pull strength(N): 10, Time: 101 sec | No obvious damage |R25/R25|25% |
| Solderability | IEC60068-2-20 | Temperature 2455, time 2-3 sec | Coverage area 95% |
| Withstand soldering temp | IEC60068-2-20 | Tin pot temp: 2605, insert depth from body 6mm, time 10 1 sec | |R25/R25|25% |
| Steady humidity and heat | IEC60068-2-78 | Temp: 402, humidity: 932%, Time: 1000 hrs | |R25/R25|25% |
| Rapid changes in temperature | IEC60068-2-14 | -40 30min25 5min200 30min25 5min, 5 cycles | |R25/R25|25% |
| High temperature storage | IEC60068-2-2 | Temp: 2005, Time: 1000 hrs | |R25/R25|25% |
| Durability for max steady current | IEC60539-1 | Sustained max steady current at ambient temperature, 100024h | |R25/R25|25% |
| Max capacity value durability | IEC60539-1 | Impose 1000 cycles, intermittent switch 50ms, cut 5 times thermal time constant as one cycle. | |R25/R25|25% |
Installation & Use Precautions
- Purpose: Current limitation.
- Soldering: Weld spot at least 2mm from the head, temperature below 360, time less than 3 seconds.
- Storage Temperature: -10 to 40.
- Storage Humidity: 75% RH.
- Storage Environment: Avoid corrosive gases and illumination.
- Shelf Life: 1 year after opening and resealing. Re-inspection is permitted if requirements are met after the period.
Product Packaging
- Packing Type: Bulk Type (default)
- Packing Specification: Self sealing bag (WH=11mm12mm) for bulk type.
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