MINIASMDC075F/33-2

Overview

The Littelfuse MINIASMDC075F/33-2 is a PolySwitch miniASMD series polymer PTC resettable fuse designed for surface mount applications. It features a maximum holding current of 750 mA and a trip current of 1.6 A at 25°C. The device supports a maximum voltage of 33 VDC with a maximum fault current rating of 100 A. Initial resistance ranges from 90 to 290 mOhms, while post-trip resistance is up to 390 mOhms. It operates within a temperature range of -40°C to +85°C in an 1812 (4532 metric) package.

Feature Summary

• Provides automatic circuit protection against overcurrent conditions through reversible polymer technology
• Engineered for surface mount integration on printed circuit boards
• Offers high interrupting capacity for robust fault handling

Applications

• Portable electronic devices requiring compact overcurrent protection
• Battery-powered equipment circuits
• Consumer electronics power lines

Procurement Notes

Verify the specific suffix designation during procurement to ensure correct voltage and current ratings. Confirm that the component meets required industry certifications such as UL or CSA for the target market. Check moisture sensitivity levels and storage conditions prior to soldering to maintain reliability.

Selection Notes

Select this component when space constraints require an 1812 footprint with a 33V DC rating. Ensure the application current remains below the 750 mA holding threshold under all operating temperatures. Verify that the expected fault currents do not exceed the 100 A maximum rating for safe operation.

Part Context

This part belongs to the miniASMD family of resettable fuses, which are optimized for automotive and industrial applications. It shares design characteristics with other PolySwitch devices but offers specific electrical parameters tailored for higher voltage environments compared to standard miniSMD variants.

Replacement Considerations

MINISMDC075F/33-2 serves as a non-automotive grade alternative within the same series.