Dongguan Ampfort Electronics Co., Ltd.
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SURGE-GARD ICL Inrush Current Limiter Circuit Protection Devices NTC Thermistors 2.5 Ohms ±20% 8A MF73T-1 2.5/8
Description
Negative Temperature Coefficient (NTC) thermistors are thermally sensitivesemiconductor resistors which exhibit a decrease in resistance as absolutetemperature increases. Change in the resistance of the NTC thermistor can bebrought about either by a change in the ambient temperature or internally by selfheating resulting from current flowing through the device. Most of the practicalapplications of NTC thermistors are based on these material characteristics.
Specification
| Name | High Power NTC Thermistor |
| P/N | MF73T-1 2.5/8 |
| R@25C | 2.5 Ohms |
| Tolerance | 20% |
| Maximum steady-state current | 8A |
| Max allowable capacity value | 680uF |
| Operating temperature | -40 ~ +170C |
| Max rated power | 3.2W |
Features
• Lowers rectifier cost by reducing required peak forward surge current rating
• Reduces Noise
• Reduces Fuse Failures
• High Current Capability
• Equivalent to SG130
Selection Procedure
• Calculate IMAX
• Calculate R@25°C
• Select SURGEGARD specified to handle the input energy &maximum current with a R@25°C value capable of limiting the inrush current
• Evaluate Joules Rating
• Calculatethe SURGEGARD™resistance at IOPusing the 'M'curve in Figure B
• Check Figure C ifde-rating isrequired for high ambient operating temperature
Installation Options
• Thru-hole Leads
• Insulated/Uninsulated
• Standoffs• Preformed Leads
• See Figure D
Actual Product Photo