Product Overview
The MF72 series of power type NTC thermistors from Nanjing Shiheng Electronics Technology Co., Ltd. are designed to suppress inrush current. These thermistors are manufactured with a black silicone resin encapsulation and tinned copper wire leads. They are suitable for applications requiring protection against current surges. The product specifications cover electrical performance, reliability, and usage guidelines, ensuring consistent and dependable operation.
Product Attributes
- Brand: Shiheng
- Product Name: MF72 Power Type NTC Thermistor
- Origin: Nanjing, China
- Encapsulation Material: Black Silicone Resin
- Lead Material: Tinned Copper Wire
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, CQC, UL (E241319), Jiangsu Province High-tech Product, TUV (R50245892)
Technical Specifications
| Item | Symbol | Test Condition | Unit | Performance Requirement |
|---|---|---|---|---|
| 1. Electrical Performance | ||||
| Zero-power resistance at 25 | R25 | Ta=250.5, Test Power 0.1mW, Tested in air | 2.5 20% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 2800 10% |
| Maximum Steady Current | I max | A | 7 | |
| Maximum Allowable Capacitance | CT | 240Vac | F | 680 |
| Dissipation Factor | mW/ | 18 | ||
| Thermal Time Constant | sec | 76 | ||
| Dielectric Strength | 500V/AC, 1min | No breakdown or arcing | ||
| Insulation Resistance | 500V/DC, 1min | M | 500 | |
| Operating Temperature Range | -40 ~ 200 | |||
| Maximum Rated Power | Pmax | W | 5 | |
| Resistance-Temperature Curve | See Figure 1 | |||
| Voltage-Current Curve | See Figure 2 | |||
| 2. Reliability | ||||
| Lead Strength | Tensile Force: 10N (for 0.5| | No visible damage, R/R25% | | |
| Solderability | Temperature 2455, Time 2-3 sec | 95% tinning area | ||
| Resistance to Soldering Heat | Solder pot temperature: 2605, Immersion depth 6mm from resistor body, Time 101 sec | R/R25% | ||
| Steady State Damp Heat | Temperature: 402, Humidity: 932%, Time: 1000 hours | R/R25% | ||
| Temperature Cycling | -40 30min 25 5min 200 30min 25 5min, 5 cycles | R/R25% | ||
| High Temperature Storage | Temperature: 2005, Time: 1000 hours | R/R25% | ||
| Maximum Steady Current Endurance | Continuous application of maximum steady current at room temperature, 100024h | R/R25% | ||
| Maximum Capacitance Endurance | Application of maximum allowable capacitance, intermittent closure 50ms, disconnection 5 times the thermal time constant per cycle, 1000 cycles applied to thermistor. | R/R25% | ||
| 3. Usage Precautions | ||||
| Product Purpose | Inrush current suppression | |||
| Soldering | Soldering point at least 2mm from coating layer, soldering temperature <360, time <3 sec | |||
| Storage Temperature | -10 ~ 40 | |||
| Storage Humidity | % RH | 75% | ||
| Storage Environment | Avoid storage in environments with corrosive gases and direct sunlight | |||
| Packaging | Reseal after opening | |||
| Shelf Life | Year | 1 | ||
| 5. Outline Dimensions (Unit: mm) | ||||
| Model | D | L1 | L2 | F1 |
| MF72-2.5D15 | Max17.5 Min17 | 52 | 7.51 | 41.5 |
| F2 | T | d | ||
| MF72-2.5D15 | Max6.0 | 0.80.05 | ||
| 6. Product Model Description | ||||
| MF72 | 2.5 | D | 15 | |
| Shiheng Brand | MF72: Power Type NTC Thermistor | 2.5: Zero-power resistance at 25 is 2.5 | 15: Body diameter D15 | |
Contact Information:
Address: No. 18 Jinyang Road, Hushu Town, Jiangning District, Nanjing City, 211121
TEL: 025-52121868
FAX: 025-52122373
Http: //www.shiheng.com.cn
E-MAIL: sales@shiheng.com.cn
1810161311_Nanjing-Shiheng-Elec-MF72-2-5D15_C122776.pdf
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