SCT816B

Overview

The SCT816B is a silicon-controlled rectifier (SCR) manufactured by SMC Diode Solutions. It features an 800 V maximum repetitive peak off-state voltage and a 16 A average on-state current rating. The device utilizes standard recovery technology with a gate trigger voltage of 3.5 V and a gate trigger current of 100 mA. It is housed in a TO-220AB package, designed for through-hole mounting. The component operates within a junction temperature range of -40°C to 125°C and supports a non-repetitive peak forward surge current of 200 A.

Feature Summary

• High voltage blocking capability rated at 800 V
• Robust 16 A continuous on-state current handling
• Standard recovery characteristics for general power control
• Through-hole TO-220AB packaging for thermal management

Applications

• Industrial motor speed control systems
• AC power regulation circuits
• Lighting dimmer applications
• Battery charging equipment

Procurement Notes

Verify the specific suffix or variant against the manufacturer's official datasheet to ensure compatibility with required thermal and electrical specifications. Confirm that the TO-220AB package dimensions match the target PCB layout. Check for RoHS compliance status if environmental regulations apply to the end product. Ensure sourcing channels provide authentic components from authorized distributors to guarantee performance reliability.

Selection Notes

Select this SCR when an 800 V blocking voltage and 16 A current capacity are required for AC phase control applications. The standard recovery time makes it suitable for line-frequency operations where ultra-fast switching is not critical. Consider the TO-220AB package for ease of heatsinking in industrial environments. Evaluate gate trigger requirements to ensure the driving circuit can supply the necessary 100 mA trigger current reliably.

Part Context

The SCT816B belongs to the family of silicon-controlled rectifiers produced by SMC Diode Solutions. These devices are engineered for robust power switching in demanding industrial and commercial environments. The series offers reliable performance in AC control applications, providing a balance of voltage rating and current handling capacity suitable for medium-power loads.

Replacement Considerations

Consult official cross-reference lists for direct substitutes with matching 800 V, 16 A ratings and TO-220AB packages. Verify that any replacement maintains identical gate trigger parameters and thermal characteristics to ensure circuit stability without redesign.