MF-R185-2

$0.49

Description：PTC RESET FUSE 30V 1.85A RADIAL
Series：Multifuse®, MF-R
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:cbfc1d2f59d7 Category: PTC Resettable Fuses Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 30V 1.85A RADIAL
Series：Multifuse®, MF-R
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：30V
Current - Hold (Ih) (Max)：1.85 A
Current - Trip (It)：3.7 A
Current - Max：40 A
Time to Trip：8.7 s
Resistance - Initial (Ri) (Min)：40 mOhms
Resistance - Post Trip (R1) (Max)：110 mOhms
Resistance - 25°C (Typ)：-
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.472" Dia x 0.118" T (12.00mm x 3.00mm)
Height - Seated (Max)：0.724" (18.40mm)
Thickness (Max)：-
Lead Spacing：0.201" (5.10mm)

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MF-R185-2

Overview

The Bourns MF-R185-2 is a radial leaded PPTC resettable fuse from the Multifuse MF-R series. It features a 30 VDC maximum voltage rating and a 1.85 A hold current. The trip current is specified at 3.7 A, with a maximum rated current of 40 A. Typical resistance ranges from 40 mΩ to 110 mΩ. Operating temperature spans -40°C to +85°C. The component utilizes a 5.1 mm lead spacing and bulk packaging.

Feature Summary

Provides automatic circuit protection through positive temperature coefficient polymer technology
Restores conductivity after fault removal without manual replacement
Designed for PCB mounting via radial leads

Applications

Overcurrent protection in consumer electronics power supplies
Signal line protection in telecommunications equipment
Battery pack protection circuits

Procurement Notes

Verify the specific suffix against official Bourns documentation to confirm exact electrical tolerances and physical dimensions. Ensure the selected variant matches the required hold and trip currents for the target application circuit. Confirm RoHS compliance status through the manufacturer's latest release notes.

Selection Notes

Select this component when a 30 VDC system requires overcurrent protection with a 1.85 A continuous operating limit. Evaluate the thermal environment to ensure operation within the -40°C to +85°C range. Consider the 5.1 mm lead pitch for appropriate PCB footprint design and assembly compatibility.

Part Context

This part belongs to the Bourns Multifuse MF-R series of high-reliability resettable fuses. The series is engineered for robust circuit protection in demanding electronic environments. The MF-R designation indicates a standard radial leaded configuration suitable for through-hole mounting on printed circuit boards.