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MF-SM250-2
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Product Detailed Parameters
- Description：PTC RESET FUSE 15V 2.5A 2SMD
- Series：Multifuse®, MF-SM
- Mfr：Bourns Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Polymeric
- Voltage - Max：15V
- Current - Hold (Ih) (Max)：2.5 A
- Current - Trip (It)：5:00 AM
- Current - Max：100 A
- Time to Trip：25 s
- Resistance - Initial (Ri) (Min)：24 mOhms
- Resistance - Post Trip (R1) (Max)：85 mOhms
- Operating Temperature：-40°C ~ 85°C
- Grade：Automotive
- Qualification：AEC-Q200
- Ratings：-
- Mounting Type：Surface Mount
- Package / Case：2-SMD
- Size / Dimension：0.344" L x 0.264" W (8.75mm x 6.71mm)
- Height - Seated (Max)：-
- Thickness (Max)：0.118" (3.00mm)
- Lead Spacing：-
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Overview
The Bourns MF-SM250-2 is a surface-mount polymer positive temperature coefficient (PPTC) resettable fuse designed for circuit protection. It features a hold current of 2.5 A and a trip current of 5 A, operating at a maximum voltage of 15 VDC. The device has a maximum resistance of 85 mΩ and a minimum resistance of 24 mΩ, with a power dissipation rating of 1.9 W. It supports a maximum current of 100 A and a switched current of 5 A. The component utilizes SMD/SMT termination style and is available in reel packaging.
Feature Summary
- Polymer PTC technology provides automatic reset functionality after fault conditions clear
- Surface mount design enables automated PCB assembly processes
- High current handling capability ensures robust protection against overcurrent events
Applications
- Automotive applications
- Standard electronic applications
- Overcurrent protection in low voltage DC circuits
Procurement Notes
Verify the specific ordering suffix to confirm package type and tape/reel specifications. Ensure the selected variant matches the required hold current and voltage ratings for the target application. Confirm RoHS compliance status if restricted substances are a concern. Cross-reference the manufacturer part number with distributor catalogs to ensure availability of the correct configuration.
Selection Notes
Select this component when a compact, surface-mount solution is required for low-voltage DC circuit protection. The 2.5 A hold current suits applications needing precise overcurrent limiting without nuisance tripping during normal operation. Consider the 15 VDC maximum voltage limit when designing power supply protection. Evaluate the thermal environment to ensure the power dissipation rating remains within safe operating limits during sustained load conditions.
Part Context
This part belongs to the MF-SM series of high-density resettable fuses from Bourns. These components are engineered for space-constrained designs requiring reliable overcurrent protection. The series offers various current ratings and package options to accommodate different board layout requirements and electrical specifications across consumer and industrial electronics.
Replacement Considerations
Public confirmed substitute part numbers are not provided in the source material. Verify compatibility by matching hold current, trip current, maximum voltage, and physical dimensions. Ensure the replacement component meets the same safety certifications and mounting requirements as the original MF-SM250-2.
