LTC4381CDKE-2#TRPBF

Overview

The LTC4381CDKE-2#TRPBF is a board-mount surge protector manufactured by Analog Devices Inc. It operates within a voltage range of 4 VDC to 72 VDC and features a low quiescent current of 12 uA. The device utilizes a DFN-32 package with dimensions of 7 mm x 5 mm x 0.7 mm. Designed for surface mount technology, it supports an operating temperature range from -40°C to +85°C. This component functions as a low Icc surge stopper intended for automotive, avionics, and industrial applications.

Feature Summary

• Provides onboard protection against electrical surges
• Maintains extremely low standby current consumption
• Supports high-voltage input ranges up to 72 VDC

Applications

• Automotive systems
• Avionics equipment
• Industrial control units

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging rather than tube. Confirm the 'C' grade designation matches required temperature specifications. Check official discontinuation notices as related variants may be end-of-life. Ensure compatibility with DFN-32 footprint requirements during integration.

Selection Notes

Select this variant when low quiescent current is critical for battery-operated or sensitive circuits. The DFN-32 package offers compact integration for space-constrained designs. Verify that the 72 VDC maximum rating aligns with system voltage peaks. Consider thermal management capabilities within the specified -40°C to +85°C operational window.

Part Context

This component belongs to the LTC4381 series of current surge stoppers. It serves as a solid-state alternative to traditional fuses and mechanical switches. The device integrates high-side switching capabilities with precise current limiting and surge suppression functions for robust power distribution protection.

Replacement Considerations

LTC4381IDKE-2#PBF is a documented pin-compatible variant within the same family.