S8X5ECS2

Overview

The Littelfuse S8X5ECS2 is a silicon-controlled rectifier (SCR) from the EV Series, designed for sensitive gate triggering applications. It features an 800 V rated repetitive off-state voltage and supports an RMS on-state current of 800 mA. The device utilizes a TO-92 through-hole package and operates within a temperature range of -40°C to +125°C. Key electrical characteristics include a maximum holding current of 5 mA, a forward voltage of 1.7 V, and a gate trigger current of 50 µA. The component exhibits a low leakage current of 3 µA under rated conditions and withstands a non-repetitive peak on-state current of 10 A.

Feature Summary

• Sensitive gate architecture enabling reliable triggering with minimal control current
• Robust thermal performance supporting operation up to 125°C junction temperature
• High voltage blocking capability suitable for demanding power switching environments

Applications

• Battery charger circuits requiring precise turn-on control
• Consumer electronics protection stages
• Control panel switching mechanisms
• DC motor drive interfaces

Procurement Notes

Verify the specific suffix against official Littelfuse documentation to confirm pinout and electrical tolerances. Ensure the procurement channel provides valid RoHS compliance records. Cross-reference the manufacturer part number with authorized distributor catalogs to avoid counterfeit components. Confirm that the delivered units match the specified TO-92 package dimensions and lead configuration.

Selection Notes

Select this component when a high-voltage SCR with low gate sensitivity is required for compact designs. The TO-92 package suits applications with limited board space and through-hole assembly constraints. Evaluate the 800 mA RMS current rating against the load requirements to ensure adequate margin. Consider the 50 µA gate trigger current for compatibility with low-power control logic or microcontroller outputs without additional amplification.

Part Context

The S8X5ECS2 belongs to Littelfuse's EV Series of sensitive gate SCRs. This series is engineered for general-purpose switching where low gate drive power is advantageous. The component shares architectural similarities with other parts in the S8X8ES family but differs in specific gate sensitivity and packaging variations. It serves as a discrete solution for controlling AC or DC loads in industrial and consumer settings.

Replacement Considerations

Direct substitutes may include other 800V 0.8A sensitive gate SCRs in TO-92 packages from Littelfuse or compatible manufacturers. Verify that replacement devices maintain identical gate trigger current specifications to ensure circuit compatibility. Check for equivalent thermal resistance and holding current values to prevent latch-up failures.