S802ECSAP

Overview

The S802ECSAP is a sensitive gate silicon controlled rectifier (SCR) from the Littelfuse EV Series, packaged in TO-92. It features a peak repetitive off-state voltage of 800 V and an average on-state current rating of 900 mA, with an RMS on-state current capacity of 1.5 A. The device requires a maximum gate trigger current of 100 µA and has a maximum gate trigger voltage of 800 mV. Designed for high static dv/dt performance and low turn-off time, it serves as a robust component for power control applications requiring precise triggering characteristics.

Feature Summary

• Sensitive gate design enabling reliable triggering with minimal gate current input
• High static dv/dt capability to prevent false triggering during rapid voltage changes
• Low turn-off time (tq) optimized for efficient circuit recovery
• Specifically engineered for ground fault detection and protection circuits

Applications

• Ground Fault Circuit Interrupter (GFCI) protection systems
• Overvoltage protection circuits
• Crown fire detection systems
• General purpose power control applications

Procurement Notes

Verify the specific suffix 'AP' against the manufacturer's official datasheet to confirm package type and marking details. Ensure the selected component matches the required 800 V blocking voltage and 1.5 A RMS current ratings for the target application. Cross-reference the sensitive gate specifications to guarantee compatibility with existing drive circuitry. Confirm active status and availability through authorized Littelfuse distributors before finalizing procurement plans.

Selection Notes

Select this SCR when a sensitive gate characteristic is required to minimize gate drive power while maintaining high reliability. The 800 V off-state voltage provides adequate margin for standard line-voltage applications. Consider the TO-92 package constraints for thermal management and board space. The low gate trigger current simplifies interface with microcontrollers or logic gates compared to standard gate SCRs.

Part Context

This component belongs to the Littelfuse EV Series, which focuses on sensitive gate SCRs designed for specific protection roles. The series emphasizes high dv/dt immunity and fast turn-off times, distinguishing it from general-purpose thyristors. The S802ECSAP variant specifically targets applications where low-power triggering and robust fault detection are critical requirements.

Replacement Considerations

Consult the official Littelfuse replacement guide for direct equivalents within the S802xSx family. Verify that any substitute maintains the 800 V voltage rating and sensitive gate sensitivity. Ensure the alternative part supports the same TO-92 package and pinout configuration to avoid PCB redesign.

FAQ

What is the maximum gate trigger current for the S802ECSAP?

The maximum gate trigger current is 100 µA, allowing for sensitive triggering with low drive power.

Is the S802ECSAP suitable for GFCI applications?

Yes, the device is specifically designed for Ground Fault Circuit Interrupter applications due to its high static dv/dt and low turn-off time.