S4X8ES1RP

Scrs Overview

The Littelfuse S4X8ES1RP is a sensitive gate Silicon Controlled Rectifier (SCR) designed for through-hole mounting in TO-92 packages. It features a rated repetitive off-state voltage (VDRM) of 400 V and an on-state RMS current (IT(RMS)) of 800 mA. The device exhibits a maximum forward voltage drop (VF) of 1.7 V and an off-state leakage current of 3 µA at VDRM. Key triggering parameters include a gate trigger voltage (VGT) of 800 mV and a gate trigger current (IGT) of 500 nA. It supports a non-repetitive on-state surge current of 10 A and operates within a temperature range of -40 °C to +125 °C.

Scrs Feature Summary

• Sensitive gate architecture enabling reliable triggering with low gate current requirements
• Robust surge current capability exceeding 10 A for transient protection applications
• Through-hole TO-92 packaging suitable for standard PCB assembly processes

Scrs Applications

• AC line voltage sensing circuits
• Solid-state relay driver stages
• General purpose switching applications requiring low gate drive power

Scrs Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct package type and tape/reel specifications. Confirm that the sensitive gate variant matches the design requirements for low-current triggering environments. Cross-reference the RoHS compliance status with current regulatory standards before finalizing procurement orders.

Scrs Selection Notes

Select this component when a 400 V blocking voltage and 800 mA continuous current rating are required in a compact TO-92 footprint. The sensitive gate characteristic makes it suitable for microcontroller-driven interfaces where minimal gate current is available. Ensure thermal management accounts for the 1.7 V forward voltage drop during conduction periods.

Scrs Part Context

This SCR belongs to the Littelfuse S4X8 series, which provides various voltage ratings up to 800 V within the same package family. The S4X8ES1RP specifically addresses applications needing 400 V isolation with high sensitivity. It complements higher-power variants in the lineup by offering a cost-effective solution for low-to-medium current control tasks.

Scrs Replacement Considerations

Direct substitutes must match the 400 V VDRM, 800 mA IT(RMS), and TO-92 package dimensions. Verify equivalent sensitive gate characteristics to maintain circuit triggering reliability. Check for pinout compatibility and thermal performance similarities before integrating alternative manufacturers' components.