Littelfuse PolySwitch 2920L Series Resettable PTC Fuse 33V DC 1.5A Hold

The Littelfuse PolySwitch 2920L Series Resettable PTC Fuse is a surface-mount overcurrent protection device with a 1.5 A hold current and a 3 A trip current, rated for 33 V DC.

Overview

This PPTC (Polymeric Positive Temperature Coefficient) fuse provides self-recovering overcurrent protection in a compact, low-profile package. After a fault condition is cleared, the device resets automatically, removing the need for manual fuse replacement. Its fast response to fault currents helps protect sensitive electronic components from damage caused by short circuits or excessive current draw.

The component is specified to operate across a temperature range of -40°C to +85°C and can withstand peak currents up to 40 A, making it suitable for demanding electrical environments.

Key Features

• Resettable operation: The PolySwitch technology returns to a low-resistance state once the fault is removed and power is cycled.
• Space-efficient design: The 2920 (7351 metric) case style suits densely packed printed circuit boards.
• Fast time-to-trip: Trips in 2 seconds under fault conditions.
• Durable construction: Built with durable materials for consistent performance and long-term stability.

Applications

Designed for electronic systems where board space is limited, this resettable fuse serves as a safety component in circuits that require reliable overcurrent protection.