S4004VS2

Overview

The S4004VS2 is a Silicon Controlled Rectifier (SCR) manufactured by Littelfuse, designed for general-purpose power control applications. It features a rated repetitive off-state voltage of 400 V and an on-state RMS current of 4 A. The device operates within a junction temperature range of -40°C to +110°C and utilizes a TO-251 package with through-hole mounting. Key electrical characteristics include a gate trigger current of 200 µA, a holding current maximum of 6 mA, and a non-repetitive peak on-state current capability of 30 A.

Feature Summary

• Sensitive gate structure enabling reliable triggering with low gate current requirements
• Robust thermal performance supporting operation in high-temperature environments up to 110°C
• High surge current handling capability suitable for inductive load switching

Applications

• General purpose AC/DC power control circuits
• Solid state relay input stages
• Industrial motor control interfaces

Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm pinout and packaging variations. Ensure the procurement channel provides traceable datasheets matching the exact part number to avoid substitution errors in sensitive designs.

Selection Notes

Select this component when a 4 A RMS SCR with a 400 V blocking voltage is required in a compact through-hole form factor. Consider the 200 µA gate sensitivity for low-power drive compatibility and verify that the TO-251 package fits the available PCB real estate constraints.

Part Context

This device belongs to the Sxx04xSx series of thyristors from Littelfuse. It shares core electrical specifications with other variants in the family but differs in physical package and mounting style, specifically utilizing the TO-251 configuration for through-hole integration.

Replacement Considerations

Direct replacements must match the 4 A / 400 V rating and TO-251 package. Verify equivalent gate trigger currents and holding parameters before substituting with generic equivalents.