Product Overview
The MF72 series of power type NTC thermistors, manufactured by Nanjing Shiheng Electronics Technology Co., Ltd., are designed for surge current suppression. These components offer reliable performance with a wide operating temperature range and are suitable for applications requiring precise temperature-dependent resistance characteristics. They are manufactured to meet stringent quality and environmental standards.
Product Attributes
- Brand: Shiheng ()
- Product Type: Power Type NTC Thermistor
- Origin: Nanjing, China
- Encapsulation Material: Black Phenolic Resin
- Lead Material: Tinned Copper Wire
- Certifications: ISO9001:2008, ISO/TS16949:2009, ISO14001:2004, RoHS, CQC Safety Certification, Jiangsu Province High-tech Product Certification, TUV Certification.
Technical Specifications
| Item | Symbol | Test Conditions | Unit | Performance Requirement | ||
|---|---|---|---|---|---|---|
| 1. Electrical Performance | ||||||
| Zero-power resistance at 25 | R25 | Ta=250.5, Test power 0.1mW, Tested in air | 520% | |||
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 260010% | ||
| Maximum Steady Current | I max | / | A | 2 | ||
| Maximum Allowable Capacitance | CT | 240Vac | F | 150 | ||
| Dissipation Factor | / | mW/ | 10 | |||
| Thermal Time Constant | / | sec | 30 | |||
| Withstand Voltage | / | 500V/AC, 1min | / | No breakdown or arcing | ||
| Insulation Resistance | / | 500V/DC, 1min | M | 500 | ||
| Operating Temperature Range | / | / | -40 ~ 130 | |||
| Maximum Rated Power | Pmax | / | W | 1 | ||
| Resistance-Temperature Curve | / | / | / | See Figure 1 | ||
| Volt-Ampere Curve | / | / | / | See Figure 2 | ||
| 2. Reliability | ||||||
| Lead Strength | / | Tension: wire diameter (mm), Tension (N) 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: 500 hours | / | R/R25% | ||
| Rapid Temperature Change | / | -40 30min25 5min130 30min25 5min, Repeat 5 times | / | R/R25% | ||
| High Temperature Storage | / | Temperature: 1305, Time: 1000 hours | / | R/R25% | ||
| Maximum Steady Current Endurance | / | Continuously apply maximum steady current to thermistor at room temperature for 50024h | / | R/R25% | ||
| Maximum Capacitance Endurance | / | Apply maximum allowable capacitance, intermittently close 50ms, open for 5 times the thermal time constant per cycle, apply 1000 cycles to the thermistor. | / | R/R25% | ||
| 5. Outline Dimensions (Unit: mm) | ||||||
| D | L1 | L2 | F | T | d | |
| Max 9.0 | Min 17 | 52 | 51 | 1 | Max 5 | 0.60.05 |
| 6. Product Model Description | ||||||
| MF72 5 D 7 | ||||||
| Shiheng Brand | MF72: Power Type NTC Thermistor | 5: Zero-power resistance at 25 is 5 | 7: Body diameter D7 | |||
3. Usage Precautions
- Product Purpose: Surge current suppression.
- Soldering: When using a soldering iron, the welding point should be at least 2mm away from the coating layer. Welding temperature should be below 360, and welding time should be less than 3 seconds.
- Storage Temperature: -1040.
- Storage Humidity: 75% RH.
- Storage Environment: Avoid storing in environments with corrosive gases and direct sunlight.
- Packaging: Reseal after opening the package.
- Shelf Life: 1 year.
4. Derating Curve
Refer to attached Figure 1 for Resistance-Temperature Curve and Figure 2 for Volt-Ampere Curve.
Contact Information:
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
1810161334_Nanjing-Shiheng-Elec-MF72-5D7_C122762.pdf
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