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Specifications
Resistance @ 25℃:
3Ω
Power(Watts):
6W
Pitch:
10mm
Operating Temperature:
-40℃~+160℃
Tolerance:
±20%
B Constant (25℃/100℃):
-
Steady State Current (Max):
8A
Thermal Time Constant:
1.47min
B Constant (25℃/85℃):
-
B Constant (25℃/75℃):
-
B Constant (25℃/50℃):
2800K
B Constant Tolerance:
±10%
Mfr. Part #:
MF72 3D20
Package:
Through Hole,P=10mm
Key Attributes
Model Number:
MF72 3D20
Product Description
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 specific electrical and thermal characteristics, making them suitable for various industrial applications requiring protection against inrush currents.
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 Conditions | Unit | Performance Requirements |
|---|---|---|---|---|
| Zero Power Resistance at 25 | R25 | Ta=250.5, Test Power 0.1mW, Tested in air | 3 20% | |
| B Value | B25/50 | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | K | 2800 10% |
| Maximum Steady Current | I max | A | 8 | |
| Maximum Allowable Capacitance | CT | 240Vac | F | 820 |
| Dissipation Factor | mW/ | 24 | ||
| Thermal Time Constant | sec | 88 | ||
| 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 | 6 | |
| Lead Strength (Pull) | 0.5| | No visible damage, R/R25% | | |
| Solderability | Temperature 2455, Time 2-3 sec | Wetted area 95% | ||
| 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 5min160 30min25 5min, Repeated 5 times | R/R25% | ||
| High Temperature Storage | Temperature: 1605, Time: 1000 hours | R/R25% | ||
| Maximum Steady Current Durability | Continuous application of maximum steady current at room temperature for 50024h | R/R25% | ||
| Maximum Capacitance Durability | Apply maximum allowable capacitance, intermittently close 50ms, open 5 times the thermal time constant for one cycle, apply 1000 cycles to the thermistor | R/R25% | ||
| Model: MF72-3D20 | MF72 | Shiheng Brand | Power Type NTC Thermistor | |
| 3 | Zero power resistance at 25 | 3 | ||
| D20 | Body Diameter | mm | D=20 |
| Dimensions (Unit: mm) | D | L | F | T | d |
|---|---|---|---|---|---|
| Max 22.5 | Min 25 | 101 | Max 7 | 1.00.05 |
Usage Notes
- 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 less than 3 seconds.
- Storage Temperature: -10 to 40.
- Storage Humidity: 75% RH.
- Storage Environment: Avoid storage in environments with corrosive gases and direct sunlight.
- Packaging: Reseal packaging after opening.
- Shelf Life: 1 year.
Contact Information
- Company: Nanjing Shiheng Electronics Technology Co., Ltd.
- Address: No. 18 Jinyang Road, Hushu Town, Jiangning District, Nanjing City, China
- Postal Code: 211121
- Tel: 025-52121868
- Fax: 025-52122373
- Email: sales@shiheng.com.cn
- Website: Http://www.shiheng.com.cn
1810161312_Nanjing-Shiheng-Elec-MF72-3D20_C122779.pdf
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