Littelfuse PolySwitch RXEF Resettable Fuse 72V DC 200mA-400mA

The Littelfuse PolySwitch RXEF Resettable Fuse 72V DC 200mA-400mA is a radial-leaded polymer positive temperature coefficient (PPTC) resettable fuse for overcurrent protection in sensitive electronic circuits. It is rated at 72V DC, with a holding current of 200mA and a trip point at 400mA.

Overview

The RXEF series is designed to provide overcurrent protection for sensitive electronic circuits. When an overcurrent condition occurs, the fuse transitions from a low-resistance to a high-resistance state, limiting the fault current. Once the fault is cleared and the power is cycled, the device resets itself, removing the need for manual replacement and helping to reduce maintenance and downtime.

Key Features

• Radial-leaded PPTC resettable fuse construction
• 72V DC voltage rating
• Holding current of 200mA with a trip point at 400mA
• Typical time-to-trip of 2.2 seconds under specified conditions
• Automatic reset after the fault is cleared and the power is cycled
• Operating temperature range from -40°C to +85°C
• Compact, round form factor with 5.8mm lead spacing for PCB integration
• Compatible with high-volume electronics assembly processes

Dimensions

The fuse measures 3.3 wide, 1.5 deep and 4.3 high, and weighs 0.153 g.

Applications

The fuse is used to protect devices such as satellite video receivers, computer motherboards, modems, and USB hubs. It is also used in industrial controls, transformers, battery packs, and communication equipment, including phones, fax machines, and analogue/digital line cards.

Certifications

The RXEF series is UL recognised, CSA approved, TÜV approved to EN 60730-1, and CQC approved to several GB standards. Choose the Littelfuse PolySwitch RXEF Resettable Fuse when you need resettable overcurrent protection for compact electronic designs.