RXEF050 0.5A Resettable PPTC Fuse – 72V Radial Polyfuse – Raychem/Littelfuse

The RXEF050 is a reliable PPTC resettable fuse (polyfuse) designed by Raychem and now produced by Littelfusefor robust overcurrent protection in electronic circuits. This radial-leaded through-hole device automatically resets after fault conditions are cleared, offering long-term, maintenance-free circuit protection.

With a hold current of 500mA and a trip current of 1A, the RXEF050 is ideal for protecting power supplies, communication devices, consumer electronics, battery-operated systems, and industrial equipment. It supports up to 72V DC operating voltage and can tolerate surge currents up to 40A, ensuring dependable performance under demanding conditions.

The device features a fast 4-second trip time at 1A, low initial resistance, and stable operation across a wide –40°C to +85°C temperature range. Safety approvals ensure suitability for a broad range of commercial and industrial applications.

Key Specifications:

• Manufacturer: Raychem / Littelfuse

• Part Number: RXEF050

• Type: PPTC Resettable Fuse (Polyfuse)

• Mounting Style: Radial, through-hole

• Hold Current (Ihold): 500mA

• Trip Current (Itrip): 1A

• Maximum Voltage: 72V DC

• Maximum Current (Imax): 40A

• Time to Trip: ~4 seconds @ 1A

• Initial Resistance: 0.5Ω

• Post-Trip Resistance: ≤ 1.17Ω

• Operating Temperature: –40°C to +85°C

Package Includes:
1 x RXEF050 0.5A Resettable PPTC Fuse

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