Power type NTC thermistor component Nanjing Shiheng Elec MF72 5D7 electrical surge suppression
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
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.