power type NTC thermistor Nanjing Shiheng Elec MF72 3D25 designed for surge current suppression applications
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Product Description
Product Overview
The MF72 series of power type NTC thermistors, manufactured by Nanjing Shiheng Electronics Co., Ltd., are designed for surge current suppression. These components offer reliable performance with a wide operating temperature range and are manufactured to stringent quality and environmental standards, including ISO9001, ISO/TS16949, ISO14001, and CQC safety certifications. They are suitable for applications requiring effective inrush current limiting.
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, CQC Safety Certification, TUV Certification, Jiangsu High-tech Product Certification
- Environmental Compliance: RoHS
Technical Specifications
| Model | Description | Parameter | Value/Requirement | Unit | Test Conditions |
|---|---|---|---|---|---|
| MF72-3D25 | Power Type NTC Thermistor | Zero Power Resistance at 25 (R25) | 3 20% | Ta=250.5, Test Power 0.1mW, in air | |
| B Value (B25/50) | 2800 10% | K | B=[(TaTb)/(Tb-Ta)]ln(Ra/Rb) | ||
| Max Steady State Current (I max) | 9 | A | |||
| Max Allowable Capacitance (CT) | 1000 | F | 240Vac | ||
| Dissipation Factor () | 32 | mW/ | |||
| Thermal Time Constant () | 124 | sec | |||
| Withstand Voltage | No breakdown or flashover | 700V/AC, 1min | |||
| Insulation Resistance | 500 | M | 500V/DC, 1min | ||
| Operating Temperature Range | -40 ~ 160 | ||||
| Max Rated Power (Pmax) | 7.5 | W | |||
| Lead Strength (Tensile) | 10 (for 0.5| N | 101 sec, no visible damage | | ||
| Solderability | 95% | % | 2455, 2-3 sec | ||
| Resistance to Soldering Heat | R/R 25% | 2605, 6mm from body, 101 sec | |||
| Stable Humidity Heat | R/R 25% | 402, 932% RH, 500 hours | |||
| Temperature Rapid Change | R/R 25% | 5 cycles (-40 30min25 5min160 30min25 5min) | |||
| High Temperature Storage | R/R 25% | 1605, 1000 hours | |||
| Max Steady State Current Durability | R/R 25% | Max steady state current applied at room temp, 50024h | |||
| Max Capacitance Durability | R/R 25% | 1000 cycles (50ms on, 5x off) | |||
| Outer Dimensions (D) | Max: 27.5, Min: 25 | mm | |||
| Outer Dimensions (L) | 10 1 | mm | |||
| Outer Dimensions (F) | Max: 8.0 | mm | |||
| Lead Diameter (d) | 1.0 0.05 | mm |
Usage Precautions:
- Purpose: To suppress surge current.
- Soldering: Distance from coating 2mm, temperature
- Storage Temperature: -10 to 40.
- Storage Humidity: 75% RH.
- Environment: Avoid corrosive gases and direct sunlight.
- Packaging: Reseal after opening.
- Shelf Life: 1 year.
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