T405Q-600B-TR

Overview

The T405Q-600B-TR is a logic-level triac manufactured by STMicroelectronics, designed for general-purpose AC inductive load control. It operates with a rated repetitive off-state voltage (VDRM) of 600 V and an RMS on-state current (ItRMS) of 4 A. The device supports non-repetitive surge currents up to 38 A. Key electrical parameters include a maximum holding current (Ih) of 10 mA, a gate trigger voltage (Vgt) of 1.5 V, and a gate trigger current (Igt) of 10 mA. The component features a low on-state voltage of 1.5 V and a leakage current of 5 uA at VDRM. It functions within a junction temperature range of -40°C to +125°C and is housed in a DPAK surface-mount package.

Feature Summary

• Logic-level sensitivity enabling direct microcontroller gate drive without additional buffering circuitry.
• Snubberless technology providing high commutation performance suitable for AC inductive loads.

Applications

• Motor drive and control systems
• Industrial appliance switching
• Consumer electronics power management

Procurement Notes

Verify the specific suffix 'TR' corresponds to the required tape-and-reel packaging configuration during sourcing. Confirm that the DPAK footprint matches the target PCB design constraints. Ensure the 600 V rating aligns with the peak line voltage requirements of the intended application circuit to maintain adequate safety margins.

Selection Notes

Select this component when a compact surface-mount solution is required for 4 A AC switching applications. The logic-level gate sensitivity simplifies driver interface design compared to standard gate devices. Consider the thermal dissipation capabilities of the DPAK package relative to the expected RMS current loading in the final assembly.

Part Context

This part belongs to the T405Q series of sensitive gate triacs from STMicroelectronics. The 'B' designation typically indicates specific electrical characteristics or pinout variations within the family, while 'TR' denotes reel packaging. It serves as the surface-mount equivalent to through-hole variants like the T405Q-600H, offering similar electrical performance in a smaller form factor.

Replacement Considerations

Direct functional substitutes within the same package may include other 4 A, 600 V logic-level triacs in DPAK packages from compatible manufacturers. Verify gate trigger current specifications to ensure compatibility with existing drive circuits before substitution.