MF-RX040/72-2

$0.70

Description：PTC RESET FUSE 72V 400MA RADIAL
Series：MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:3ee6c1c3e3ba Category: PTC Resettable Fuses Brand: Bourns Inc.

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 72V 400MA RADIAL
Series：MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：-
Voltage - Max：72V
Current - Hold (Ih) (Max)：400 mA
Current - Trip (It)：800 mA
Current - Max：40 A
Time to Trip：3.9 s
Resistance - Initial (Ri) (Min)：-
Resistance - Post Trip (R1) (Max)：-
Operating Temperature：-
Grade：-
Qualification：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.291" Dia x 0.122" W (7.40mm x 3.10mm)
Height - Seated (Max)：-
Thickness (Max)：-
Lead Spacing：0.201" (5.10mm)

Download product information

MF-RX040/72-2

Overview

The Bourns MF-RX040/72-2 is a radial leaded PPTC resettable fuse from the Multifuse MF-RX series. It features a hold current of 0.4 A and a maximum voltage rating of 72 VDC. The device trips at 0.8 A and has a maximum trip time of 2 seconds. It operates within a temperature range of -40°C to +85°C and carries UL, CSA, and RoHS certifications.

Feature Summary

Provides automatic circuit protection against overcurrent conditions by increasing resistance when tripped.
Offers repeated use capability after fault clearance without requiring replacement.
Designed for through-hole mounting with radial leads for standard PCB integration.

Applications

Overcurrent protection in portable electronic devices
Protection for battery packs and power supply circuits
Surge protection in communication equipment interfaces

Procurement Notes

Verify component authenticity by checking manufacturer markings and datasheet specifications. Confirm that the radial lead configuration matches the target PCB footprint requirements. Ensure the 72V DC rating aligns with the system's maximum operating voltage to guarantee reliable performance under all conditions.

Selection Notes

Select this component when a low-profile radial solution is required for circuits operating up to 72V DC. The 0.4A hold current suits applications needing precise current limiting without nuisance tripping during normal operation. Consider thermal derating factors if the ambient temperature approaches the upper limit of the specified operating range.

Part Context

This part belongs to the Bourns Multifuse MF-RX family of polymer positive temperature coefficient resettable fuses. These components are engineered to provide robust circuit protection in space-constrained environments while maintaining compliance with international safety standards for consumer and industrial electronics.

Replacement Considerations

Consult official Bourns documentation for verified substitute part numbers. Do not assume cross-compatibility with other manufacturers' PTC devices due to variations in trip characteristics and voltage ratings.