Nanjing Shiheng Elec MF72 8D11-3.5 Power NTC Thermistor Silicone Resin Encapsulation for Industrial
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Delivery Time:
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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. Utilizing a silicone resin encapsulation, these thermistors offer high temperature resistance (up to 300C), rapid heat dissipation, and excellent insulation. They are suitable for various industrial applications where surge current suppression is critical. Despite potential surface friction marks and minor cracks at the leads due to material properties, these do not affect the product's performance or reliability.
Product Attributes
- Brand: Shiheng
- Series: MF72
- Type: Power NTC Thermistor
- Encapsulation Material: Green Silicone Resin
- Certifications: ISO9001:2015, IATF16949:2016, ISO14001:2015, RoHS 2.0, CQC (CQC04001010556), TUV (R50245892), Jiangsu Province High-tech Product, 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) | K | 820% | |||
| B-value | B25/50 | Ta=250.01, Tb=500.01 | K | 280010% | |||
| Max steady current | I max | - | A | 3 | |||
| Max allowable capacity value | CT | 240Vac | F | 220 | |||
| Thermal dissipation Coefficient | In still air | mW/ | 14 | ||||
| Thermal time constant | In still air | sec | 47 | ||||
| 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 8D11 | Dimensions (mm): | Dmax | L1 | L22 | F0.5 | Tmax | d0.05 |
| - | - | 12.0 | 3.50.5 | 5 | 7.5 | 5.5 | 0.8 |
| Technical Requirements: | Zero Power Resistance: R25: 820% | ||||||
| - | B-value: B25/50: 2800K10% | ||||||
| - | Lead wire: Tinned copper-weld steel wire | ||||||
| - | Encapsulation: Green silicone resin | ||||||
| - | Environmental Compliance: RoHS | ||||||
| Reliability: Terminal strength | - | Pull strength (0.5| - | No obvious damage, |R25/R25|25% | | |||
| - | - | Pull strength (0.8| - | No obvious damage, |R25/R25|25% | | |||
| Reliability: Solderability | - | Temperature 2455, Time 2-3 sec | - | Tin coverage area 95% | |||
| Reliability: Withstand soldering temp | - | Tin pot temp: 2605, depth 6mm, time 101 sec | - | |R25/R25|25% | |||
| Reliability: Steady humidity and heat | - | Temp: 402, Humidity: 932%, Time: 1000 hrs | - | |R25/R25|25% | |||
| Reliability: Rapid changes in temperature | - | -40 30min 25 5min 170 30min 25 5min, 5 cycles | - | |R25/R25|25% | |||
| Reliability: High temperature storage | - | Temp: 1705, Time: 1000 hrs | - | |R25/R25|25% | |||
| Reliability: Durability for max steady current | - | Impose sustained max steady current at ambient temperature, 100024h | - | |R25/R25|25% | |||
| Reliability: Max capacity value | - | 1000 cycles (intermittent switch 50ms, cut 5 times thermal time constant) | - | |R25/R25|25% | |||
| Product Packaging: | Packing Type: Bulk Type | ||||||
| - | Packing Specification: Packing bag (self sealing bag) WH=11mm12mm | ||||||
| Installation & Use Precautions: | Purpose: Current limitation | ||||||
| - | Soldering: Weld spot at least 2mm from head, temp | ||||||
| - | Storage Temperature: -1040; Humidity: 75% RH | ||||||
| - | Avoid storage in environments with corrosive gases and illumination. | ||||||
| - | Storage period: 1 year after opening and resealing. Re-inspection required after expiry. | ||||||
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