MF-SM185/33-2

$0.44

Description：PTC RESET FUSE 33V 1.8A 2SMD
Series：Multifuse®, MF-SM
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:d678f9af52be Category: PTC Resettable Fuses Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 33V 1.8A 2SMD
Series：Multifuse®, MF-SM
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：33V
Current - Hold (Ih) (Max)：1.8 A
Current - Trip (It)：3.6 A
Current - Max：40 A
Time to Trip：5 s
Resistance - Initial (Ri) (Min)：40 mOhms
Resistance - Post Trip (R1) (Max)：150 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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MF-SM185/33-2

Overview

The Bourns MF-SM185/33-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-SM series. It provides overcurrent protection with a maximum voltage rating of 33V and a trip current of 3.6A. The device maintains a holding current of 1.8A and trips within 5 seconds under fault conditions. It features a compact footprint measuring 9.5mm in length, 3mm in width, and 3mm in height, suitable for automated assembly.

Feature Summary

Self-resetting thermal protection mechanism eliminates the need for manual replacement after fault clearance.
Surface-mount construction enables direct integration into PCB layouts for space-constrained designs.
Polymeric material provides rapid response to overcurrent events while maintaining stable performance.

Applications

Portable electronic devices requiring compact circuit protection
Consumer electronics power input circuits
Industrial control board overcurrent safeguarding

Procurement Notes

Verify component authenticity through authorized Bourns distributors or official channels. Confirm datasheet revisions match production batch requirements. Ensure storage conditions comply with moisture sensitivity level specifications to maintain solderability and electrical integrity prior to assembly.

Selection Notes

Evaluate circuit operating voltage against the 33V maximum rating to prevent dielectric breakdown. Compare expected load current with the 1.8A holding current to avoid nuisance tripping during normal operation. Assess ambient temperature effects on trip characteristics, as higher temperatures reduce effective current capacity.

Part Context

This component belongs to the MF-SM series of miniature resettable fuses designed for surface-mount technology applications. The series offers various current and voltage ratings to accommodate diverse circuit protection needs while maintaining a consistent low-profile package format for modern manufacturing processes.