MF-RX185/72-2

$0.55

Description：PTC RESET FUSE 72V 1.85A RADIAL
Series：Multifuse®, MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:a089fc046467 Category: PTC Resettable Fuses Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 72V 1.85A RADIAL
Series：Multifuse®, MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：72V
Current - Hold (Ih) (Max)：1.85 A
Current - Trip (It)：3.7 A
Current - Max：40 A
Time to Trip：12.6 s
Resistance - Initial (Ri) (Min)：80 mOhms
Resistance - Post Trip (R1) (Max)：190 mOhms
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.701" L x 0.122" W (17.80mm x 3.10mm)
Height - Seated (Max)：0.902" (22.90mm)
Thickness (Max)：-
Lead Spacing：0.201" (5.10mm)

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MF-RX185/72-2

Overview

The Bourns MF-RX185/72-2 is a radial leaded polymeric positive temperature coefficient (PPTC) resettable fuse from the MF-RX/72 series. It features a hold current of 1.85 A and a trip current of 3.7 A, with a maximum voltage rating of 72 VDC. The device has a maximum resistance of 190 mΩ and a minimum resistance of 80 mΩ. It operates within a temperature range of -40°C to +85°C and supports a maximum fault current of 40 A. The component measures 15.18 mm in diameter and 21.18 mm in height, with a lead spacing of 5.1 mm.

Feature Summary

Provides automatic circuit protection by increasing resistance significantly upon overheating due to overcurrent conditions
Automatically resets to a low-resistance state once the fault condition is removed and the device cools down
Designed for through-hole PCB mounting with radial leads for secure mechanical attachment

Applications

Overcurrent protection in consumer electronics circuits
Protection in industrial instrumentation systems
Surge and overload protection in telecommunications equipment

Procurement Notes

Verify that the specific suffix '-2' corresponds to the reel packaging format as indicated in distributor listings, while ensuring the electrical parameters match the required 1.85 A hold current and 72 VDC rating. Confirm RoHS compliance status and UL certification requirements for the target application before finalizing procurement orders.

Selection Notes

Select this component when a high-current resettable fuse is needed for 72 VDC systems requiring a 1.85 A hold current. Ensure the available space accommodates the 15.18 mm diameter and 21.18 mm height. Verify that the 40 A maximum fault current capability exceeds the potential short-circuit currents in the protected circuit to ensure reliable operation.

Part Context

This part belongs to the Bourns MF-RX/72 series of PPTC resettable fuses. The series offers various hold currents and voltage ratings, utilizing polymeric technology for rapid response to overcurrent events. These components are designed to replace traditional fusible links in applications requiring repeated protection cycles without manual replacement.