T405-800B-TR

Overview

The T405-800B-TR is a logic-level sensitive gate triac manufactured by STMicroelectronics, designed for surface-mount applications in the DPAK package. It features an RMS on-state current of 4 A and a rated repetitive off-state voltage of 800 V. Key electrical parameters include a non-repetitive peak on-state current of 31 A, a maximum holding current of 10 mA, and a gate trigger current of 5 mA. The device operates within a junction temperature range of -40°C to +125°C and exhibits a typical on-state voltage of 1.5 V.

Feature Summary

• Logic-sensitive gate architecture enabling direct drive from microcontrollers or low-power logic circuits without additional triggering components.
• Snubberless technology providing high commutation performance suitable for AC inductive loads with improved dV/dt and dI/dt capabilities.

Applications

• Control of universal motors in power tools and kitchen appliances.
• Electro-valve switching in domestic appliances such as dishwashers and washing machines.
• General AC load switching in industrial systems requiring compact surface-mount solutions.

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official datasheet to confirm pinout configuration and electrical tolerances, as variations may exist within the T405 series. Ensure the ordering quantity aligns with standard reel packaging specifications provided by authorized distributors. Cross-reference the RoHS compliance status with the latest environmental declaration documents prior to final procurement decisions.

Selection Notes

Select this component when an 800 V blocking voltage is required for AC line applications, distinguishing it from the 600 V variant. The 4 A RMS rating suits moderate power loads, while the sensitive gate characteristic simplifies driver design. Consider the DPAK thermal performance for heat dissipation requirements in enclosed spaces compared to through-hole alternatives.

Part Context

This part belongs to the T405 series of three-quadrant triacs from STMicroelectronics. The series utilizes proprietary Snubberless and logic-level technologies to enhance commutation reliability. The T405-800B-TR specifically denotes the 800 V voltage grade version packaged in tape and reel format for automated surface-mount assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Engineers should consult the manufacturer's official replacement guide or contact technical support directly for validated cross-reference data before implementing alternative components in production designs.