S4006DS2TP

Overview

The Littelfuse S4006DS2TP is a sensitive gate Silicon Controlled Rectifier (SCR) rated for 400 V repetitive off-state voltage and 6 A RMS on-state current. It features a low gate trigger current of 200 µA maximum, enabling direct interfacing with microprocessors or sense coils. The device operates within a junction temperature range of -40°C to +110°C and utilizes a TO-252AA surface-mount package. Key electrical parameters include a forward voltage of 1.6 V at rated current, a holding current of 6 mA maximum, and a non-repetitive peak surge current capability of 100 A.

Feature Summary

• Sensitive gate architecture allows triggering by low-power control signals such as microprocessors or proximity switches.
• Glass-passivated junctions provide robust protection against environmental stress and voltage transients.
• Surface-mount TO-252AA package facilitates automated assembly and efficient heat sinking via the exposed tab.

Applications

• Capacitive discharge ignition systems for strobe lights and power tools.
• AC phase control and rectification in home appliances and white goods.
• Motor speed control circuits and battery regulators for two-wheeler vehicles.

Procurement Notes

Verify the specific suffix 'S2TP' confirms the sensitive gate variant and TO-252AA surface-mount packaging configuration. Ensure the procurement documentation explicitly states the 400V rating and 6A current capacity to distinguish it from standard gate or higher-voltage siblings within the Sxx06x family. Cross-reference the manufacturer's latest datasheet for any updates on RoHS compliance status or agency approvals before finalizing orders.

Selection Notes

Select this component when circuit design requires triggering via low-current logic outputs or sense coils rather than high-power gate drivers. The 400V rating suits lower-voltage AC mains applications, while the 6A RMS current supports moderate load switching. Consider the TO-252AA package for PCB space constraints where through-hole options are unavailable. Verify thermal management requirements for the operating environment given the 110°C maximum junction limit.

Part Context

This part belongs to the Littelfuse Sxx06x series of 6 Amp SCRs, which includes both sensitive and standard gate variants. The series is designed for uni-directional switching applications requiring reliable performance in industrial and consumer environments. The S4006DS2TP specifically addresses the need for easy integration with modern digital control systems due to its ultra-low gate trigger current specification.

Replacement Considerations

The S4006VS2TP serves as a standard gate alternative within the same package and current/voltage ratings, though it requires higher gate drive current. For higher voltage applications, the S6006DS2TP offers identical sensitivity and current handling but with a 600V rating. Verify pinout compatibility and thermal characteristics when substituting these family members.