MF-RX040/72-AP

$0.26

Description：PTC RESET FUSE 72V 400MA RADIAL
Series：MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Box (TB)

SKU:9ec2600340f3 Category: PTC Resettable Fuses Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 72V 400MA RADIAL
Series：MF-RX/72
Mfr：Bourns Inc.
Package：Tape & Box (TB)
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)

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MF-RX040/72-AP

Overview

The Bourns MF-RX040/72-AP is a radial leaded Polymeric Positive Temperature Coefficient (PPTC) resettable fuse from the Multifuse MF-RX/72 series. It provides overcurrent protection with a hold current of 400 mA and a trip current of 800 mA at maximum ambient temperature. The device supports a maximum voltage of 72 VDC and offers a high fault current rating of 40 A. Initial resistance is typically 860 mOhms, with power dissipation rated at 550 mW. It operates within a temperature range of -40°C to +85°C.

Feature Summary

Utilizes polymer PTC technology for automatic circuit recovery after fault conditions
Provides robust short-circuit protection in high-voltage environments up to 72 VDC
Eliminates nuisance tripping caused by normal temperature fluctuations
Features radial leads for through-hole PCB mounting

Applications

Overcurrent protection for automotive electronic circuits
Surge and overload protection in industrial communication systems
Protection for consumer electronics and security equipment
High-reliability portable device battery circuits

Procurement Notes

Verify the specific suffix against official documentation to confirm packaging type. The AP suffix indicates Ammo Pack packaging, which differs from standard bulk configurations. Ensure the selected variant matches the required handling and assembly specifications for the production line.

Selection Notes

Select this component when a 400 mA hold current and 72 VDC rating are required for radial leaded applications. Consider the 860 mOhms initial resistance and 550 mW power dissipation limits during thermal design. Verify that the 800 mA trip current aligns with the circuit's operational tolerance before implementation.

Part Context

This part belongs to the Bourns Multifuse MF-RX/72 series, designed for high-voltage applications. The series utilizes a specialized 125°C polymer element to ensure reliable performance in harsh environments. It serves as a cost-effective alternative to traditional fuses by offering reusable protection without manual replacement.