Industrial Surge Protection Thermistor Nanjing Shiheng Elec MF72 5D25 Power Type NTC with Performance
Product Overview
The MF72 Power Type NTC Thermistor, manufactured by Nanjing Shiheng Electronics Technology Co., Ltd., is designed for surge current suppression. This product offers reliable performance within a wide operating temperature range and is suitable for various industrial applications requiring protection against inrush currents. Key electrical and reliability specifications are detailed to ensure optimal integration and function.
Product Attributes
- Brand: Shiheng
- Product Series: MF72 Power Type NTC Thermistor
- Origin: Nanjing, China
- Encapsulation Material: Black Phenolic Resin
- Lead Material: Tinned Copper Wire
- Certifications: ISO9001:2015, ISO/TS16949:2009, ISO14001:2015, RoHS, CQC Safety Certification, Jiangsu Province High-tech Product Certification, TUV (R50245892)
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Performance Requirements |
|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5, Test Power 0.1mW, Tested in Air | 5 20% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 3000 10% |
| Maximum Steady State Current | Imax | - | A | 8 |
| Maximum Allowable Capacitance | CT | 240Vac | F | 1000 |
| Dissipation Factor | - | mW/ | 32 | |
| Thermal Time Constant | - | sec | 125 | |
| Withstand Voltage | - | 700V/AC, 1min | - | No breakdown or arcing |
| Insulation Resistance | - | 500V/DC, 1min | M | 500 |
| Operating Temperature Range | - | - | -40 ~ 160 | |
| Maximum Rated Power | Pmax | - | W | 7.5 |
| Lead Strength (Tensile) | - | 101 sec | N | 0.5<d0.8: 10; 0.8<d1.25: 20 |
| Lead Strength (Tensile) | - | 101 sec | % | R/R 25% |
| Solderability | - | Temperature 2455, Time 2-3 sec | - | Tinning Area 95% |
| Resistance to Soldering Heat | - | Solder pot temperature: 2605, Immersion depth 6mm from the resistor body, Time 101 sec | - | R/R 25% |
| Steady State Damp Heat | - | Temperature: 402, Humidity: 932%, Time: 500 hours | - | R/R 25% |
| Rapid Change of Temperature | - | -40 30min25 5min160 30min25 5min, Repeated 5 cycles | - | R/R 25% |
| High Temperature Storage | - | Temperature: 1605, Time: 500 hours | - | R/R 25% |
| Maximum Steady State Current Endurance | - | Thermistor continuously applied maximum steady state current at room temperature for 50024h | - | R/R 25% |
| Maximum Capacitance Endurance | - | Applied maximum allowable capacitance, intermittently closed 50ms, disconnected 5 times the thermal time constant for one cycle, applied 1000 cycles to the thermistor. | - | R/R 25% |
| Model: MF72 5D25 | D | Body Diameter | mm | 25 (Max) |
| Model: MF72 5D25 | L | Lead Length | mm | 27.5 (Min) |
| Model: MF72 5D25 | F | Lead Spacing | mm | 10 1 |
| Model: MF72 5D25 | T | Lead Diameter | mm | 1.0 0.05 |
| Model: MF72 5D25 | d | Max Body Diameter | mm | 8.0 |
Usage Notes:
- Purpose: Surge current suppression.
- Soldering: Keep the soldering point at least 2mm away from the coating layer. Soldering temperature should be below 360, and soldering time less than 3 seconds.
- Storage Temperature: -10 to 40.
- Storage Humidity: 75% RH.
- Avoid storage in environments with corrosive gases and direct sunlight.
- Reseal packaging after opening.
- Shelf Life: 1 year.
Manufacturer Contact:
Nanjing Shiheng Electronics Technology Co., Ltd.
Address: No. 18 Jinyang Road, Hushu Town, Jiangning District, Nanjing City, China
Zip Code: 211121
TEL: 025-52121868
FAX: 025-52122373
Http: //www.shiheng.com.cn
E-MAIL: sales@shiheng.com.cn
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