LTC4381IDKE-2#PBF

Overview

The LTC4381IDKE-2#PBF 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 is housed in a DFN-32 package with dimensions of 7 mm x 5 mm x 0.7 mm. It supports surface mount technology (SMD/SMT) and functions reliably across an operating temperature range from -40°C to +85°C. This component is designed for applications requiring robust surge suppression capabilities.

Feature Summary

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

Applications

• Automotive systems
• Avionics equipment
• Industrial control units

Procurement Notes

Verify the current lifecycle status before procurement, as this part may be discontinued or subject to limited supply conditions. Confirm that the DFN-32 package and specific suffix match your design requirements. Check for moisture sensitivity handling instructions if storage duration has exceeded recommended limits. Ensure compatibility with existing thermal management strategies given the small form factor.

Selection Notes

Select this component when designing circuits requiring high-voltage surge protection with minimal power drain. The DFN-32 package suits space-constrained layouts. Consider the -40°C to +85°C operating range for environmental suitability. Verify that the 12 uA quiescent current meets system standby specifications. Ensure the 72 VDC maximum rating aligns with the target bus voltage.

Part Context

This device belongs to the LTC4381 series of surge stoppers from Analog Devices. It is engineered for protecting sensitive electronics from transient voltage spikes. The series offers various packages and ratings to accommodate different industrial and automotive standards. The IDKE-2 variant specifically denotes the industrial temperature grade and DFN-32 packaging configuration.

Replacement Considerations

Check for official substitute part numbers from Analog Devices if this item is unavailable. Verify pinout compatibility and electrical parameter equivalence for any alternative components.