S4008RTP

Overview

The S4008RTP is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse Inc. It features an 8 A RMS on-state current rating and supports a repetitive peak off-state voltage of 400 V. The device utilizes a surface-mount DPAK-2 (TO-252-2) package configuration. Key electrical parameters include a maximum gate trigger current of 500 uA, a forward voltage drop of 1.6 V, and a non-repetitive peak on-state current capacity of 100 A. The component operates within a temperature range from -40 °C to +110 °C.

Feature Summary

• High sensitivity gate triggering capability for efficient control circuitry
• Surface-mount construction optimized for automated PCB assembly processes
• Robust thermal performance suitable for compact power management designs

Applications

• General purpose AC/DC power conversion circuits
• Solid-state relay switching applications
• Industrial motor speed control systems

Procurement Notes

Verify the specific datasheet revision and manufacturer documentation when sourcing this component. Confirm that the ordering suffix corresponds to the required tape-and-reel packaging format. Ensure compliance with RoHS directives and check for any specific handling requirements related to moisture sensitivity levels during storage and soldering operations.

Selection Notes

Select this SCR based on its 8 A continuous current rating and 400 V blocking voltage capabilities. Consider the low gate trigger current requirement for driving compatibility with standard logic or microcontroller outputs. Evaluate the thermal resistance characteristics of the DPAK-2 package against the expected heat dissipation requirements of the target application environment.

Part Context

This part belongs to the Littelfuse Sxx08xSx series of silicon controlled rectifiers. The series provides standardized high-current thyristor solutions designed for reliable operation in various power control environments. The specific model integrates industry-standard pinouts and mechanical dimensions to facilitate direct replacement in existing board layouts requiring similar electrical specifications.

Replacement Considerations

Compatible substitutes include the S4008DS3RP, which shares identical electrical ratings and package type. Verify that alternative components maintain the same gate trigger current limits and thermal characteristics to ensure circuit functionality remains unchanged.