Power Type NTC Thermistor Nanjing Shiheng Elec MF72 5D20 for Industrial Surge Protection Applications
Product Overview
The MF72 Series Power Type NTC Thermistor from Nanjing Shiheng Electronics Technology Co., Ltd. is designed for surge current suppression. This series offers reliable performance with a wide operating temperature range of -40C to 160C. Key electrical characteristics include a zero-power resistance at 25C (R25) and a B value, crucial for defining its thermal behavior. The product is manufactured with a black phenolic resin encapsulation and tinned copper leads, ensuring durability and ease of soldering. Suitable for various industrial applications requiring effective inrush current limiting.
Product Attributes
- Brand: Shiheng
- Product Name: MF72 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 High-tech Product Certification, TUV Certification
Technical Specifications
| Item | Symbol | Test Condition | Unit | Performance Requirement |
|---|---|---|---|---|
| Zero-power resistance at 25 | R25 | Ta=250.5, Test Power 0.1mW, in air | 5 20% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 3000 10% |
| Max Steady Current | I max | - | A | 7 |
| Max Allowable Capacitance | CT | 240Vac | F | 820 |
| Dissipation Factor | - | mW/ | 24 | |
| Thermal Time Constant | - | sec | 87 | |
| Withstand Voltage | - | 700V/AC, 1min | - | No breakdown or flashover |
| Insulation Resistance | - | 500V/DC, 1min | M | 500 |
| Operating Temperature Range | - | - | -40 ~ 160 | |
| Max Rated Power | Pmax | - | W | 6 |
| Lead Strength (Pull) | - | Time: 101 sec | N | 0.5<d0.8: 10; 0.8<d1.25: 20 |
| Solderability | - | Temperature 2455, Time 2-3 sec | - | Tinning area 95% |
| Resistance to Soldering Heat | - | Solder pot temp: 2605, Immersion depth 6mm from body, Time 101 sec | - | R/R 25% |
| Steady State Damp Heat | - | Temperature: 402, Humidity: 932%, Time: 500 hours | - | R/R 25% |
| Rapid Temperature Change | - | -40 30min25 5min160 30min25 5min, 5 cycles | - | R/R 25% |
| High Temperature Storage | - | Temperature: 1605, Time: 1000 hours | - | R/R 25% |
| Max Steady Current Durability | - | Continuously apply max steady current at room temp for 50024h | - | R/R 25% |
| Max Capacitance Durability | - | Apply max allowable capacitance, close 50ms, open 5 times thermal time constant for a cycle, 1000 cycles | - | R/R 25% |
| Product Model Description: MF72-5D20 Shiheng Brand MF72: Power Type NTC Thermistor 5: Zero-power resistance at 25 is 5 20: Body diameter D20 | ||||
| Outline Dimensions (Unit: mm): D: Max 22.5, Min 25; L: 101; F: Max 7; T: 1.00.05 | ||||
Usage Precautions:
- Purpose: Surge current suppression.
- Soldering: Distance from coating layer 2mm, temperature < 360, time < 3 seconds.
- Storage Temperature: -1040.
- Storage Humidity: 75% RH.
- Avoid storage in corrosive gas or direct sunlight environments.
- Reseal packaging after opening.
- Shelf life: 1 year.
Contact Information:
Tel: 025-52121868
Address: No. 18 Jinyang Road, Hushutown, Jiangning District, Nanjing City, 211121, China
Fax: 025-52122373
Email: sales@shiheng.com.cn
Website: http://www.shiheng.com.cn
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