S8X5ECSAP

Overview

The Littelfuse S8X5ECSAP is a silicon-controlled rectifier (SCR) belonging to the EV Series, designed for sensitive gate triggering applications. It features an 800V repetitive peak off-state voltage and a holding current of 5mA. The device is housed in a TO-92 package with three leads arranged in a straight configuration. It operates within a junction temperature range of -40°C to +150°C and supports a maximum RMS on-state current of 0.8A. This component is engineered for reliable switching performance in low-power control circuits.

Feature Summary

• Sensitive gate structure enables reliable triggering with low gate current requirements
• High thermal stability supports operation in elevated temperature environments up to 150°C
• Robust blocking capability provides protection against high voltage transients in off-state

Applications

• Thyristor trigger circuits for power control systems
• Lighting dimmer switches and phase control applications
• Battery charger regulation circuits
• Solid-state relay driver stages

Procurement Notes

Verify the complete part number including suffixes such as AP to ensure correct packaging and tape-and-reel specifications. Confirm that the TO-92 lead form matches the target PCB footprint. Cross-reference regulatory approvals like UL or VDE if specific compliance is required for the end product. Ensure storage conditions maintain device integrity prior to assembly.

Selection Notes

Select this component when a low-cost, through-hole SCR with sensitive gate characteristics is required. The 0.8A current rating suits light-duty AC load control. Compare holding current and gate trigger voltage against circuit drive capabilities. Consider the TO-92 package constraints regarding thermal dissipation and board space availability compared to surface-mount alternatives.

Part Context

This device is part of Littelfuse's EV Series of silicon-controlled rectifiers. The series focuses on general-purpose switching applications requiring robust performance in compact packages. The S8X5ECSAP variant specifically denotes the 800V blocking voltage class and the AP packaging option, distinguishing it from lower voltage or different package configurations within the same family.

Replacement Considerations

Direct replacements must match the 800V VDRM, 0.8A IT(RMS), and TO-92 straight lead form. Verify compatible gate trigger currents to ensure proper circuit operation. Check equivalent manufacturers' datasheets for pinout compatibility and thermal resistance values to guarantee seamless integration without redesign.

FAQ

What is the maximum repetitive peak off-state voltage for the S8X5ECSAP?

The maximum repetitive peak off-state voltage (VDRM) is 800V.

Does the S8X5ECSAP require a high gate current to turn on?

No, it is a sensitive gate device designed to operate with low gate trigger currents, typically in the microampere range.

What is the operating junction temperature range?

The device supports a junction temperature range from -40°C to +150°C.