S401EAP

Overview

The S401EAP is a silicon-controlled rectifier (SCR) manufactured by Littelfuse Inc., designed for standard phase control applications. It features a 400 V repetitive peak reverse voltage and a 1 A average on-state current rating. The device utilizes a TO-92 through-hole package, making it suitable for compact circuit designs. As part of the Low Power SCR series, it offers standard recovery characteristics optimized for lower current heat, lamp, and audible alarm controls in home goods.

Feature Summary

• Standard phase control triggering capability requiring minimal gate current
• Through-hole mounting configuration for reliable PCB integration
• Optimized thermal performance for low-power consumer applications

Applications

• Audible alarm controls for home goods
• Lamp dimming and control circuits
• Lower current heat regulation systems

Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and compliance status. Confirm that the 400V rating aligns with the target circuit's voltage requirements. Check for RoHS compliance documentation if required by project specifications. Ensure the TO-92 footprint matches the design layout before finalizing procurement orders.

Selection Notes

Select this component for applications requiring standard phase control with moderate current handling. The 1A rating suits small-scale power regulation tasks. Consider the TO-92 package size constraints during board layout. Evaluate thermal dissipation needs for continuous operation within the specified current limits.

Part Context

This device belongs to Littelfuse's Low Power SCR series, which provides solutions up to 1200V. The S401EAP specifically targets the 400V segment, offering a balance of voltage blocking and current carrying capacity for residential and light industrial electronics.

Replacement Considerations

Cross-reference with other 400V 1A SCRs in the TO-92 package. Verify pinout compatibility and electrical parameter equivalence before substitution.