T435-600T

Overview

The T435-600T is a Snubberless™ Triac from STMicroelectronics, rated for 600 V blocking voltage and 4 A RMS on-state current. It utilizes logic level technology to enable direct microcontroller interfacing with a maximum gate trigger current of 35 mA. The device operates within a junction temperature range of -40°C to 125°C and is housed in a TO-220 package. Key electrical parameters include a peak non-repetitive surge current of 30 A at 50 Hz and 31 A at 60 Hz, a holding current of 35 mA, and a maximum gate trigger voltage of 1.3 V.

Feature Summary

• Snubberless operation eliminates the need for external RC snubber circuits under specified limits
• Logic level triggering allows direct drive from standard microcontroller ports
• High static dV/dt immunity reduces false turn-on risks in noisy environments

Applications

• Universal motor speed control in power tools
• Electrovalve actuation in kitchen appliances
• Light dimmer circuits

Procurement Notes

Verify the specific ordering suffix to confirm the exact package variant and tape-and-reel specifications. Confirm RoHS compliance status and moisture sensitivity level requirements against the target assembly process. Ensure the supplier provides valid traceability documentation for the semiconductor batch.

Selection Notes

Select this component when designing AC inductive load switches that require high commutation performance without external snubbers. The 35 mA gate current rating facilitates interface with low-power logic devices. Verify that the application's peak transient currents remain within the 30 A/31 A surge limits defined for the 50 Hz or 60 Hz supply frequency respectively.

Part Context

This part belongs to the T4 Series of 4A Triacs, which are engineered for general-purpose AC switching applications. The series leverages ST’s proprietary Snubberless technology to simplify circuit design by removing passive components typically required for dv/dt protection. It serves as a solid-state alternative to mechanical relays in compact appliance designs.

Replacement Considerations

Direct substitutes within the same family include T435-800T for higher voltage ratings. Cross-family replacements such as Z0409MF may be considered if pin compatibility and thermal characteristics align with the existing PCB layout and heat dissipation strategy.

FAQ

What is the maximum gate trigger current (Igt) for the T435-600T?

The maximum gate trigger current is 35 mA, enabling direct connection to many microcontroller output pins.

Does the T435-600T require an external snubber circuit?

No, it features Snubberless technology designed to operate without an external RC snubber circuit when operating within specified limits.

What is the peak non-repetitive surge current capability?

The device supports a surge current of 30 A at 50 Hz and 31 A at 60 Hz.