T1235T-6I

Triacs Overview

The T1235T-6I is a bidirectional triac from STMicroelectronics, designed for general-purpose AC switching applications. It features a standard 12 A RMS on-state current and a 600 V rated repetitive off-state voltage. The device operates within a junction temperature range of -40 °C to +125 °C. Key electrical parameters include a maximum holding current of 30 mA, a gate trigger voltage of 1.3 V, and a gate trigger current of 35 mA. It exhibits a typical on-state voltage of 1.55 V and a low off-state leakage current of 5 µA at the rated blocking voltage.

Triacs Feature Summary

• Snubberless logic level design eliminates the need for external snubber RC circuits under defined limits
• TO-220AB insulated package provides tab insulation with UL1557 certification at 2.5 kV RMS
• Three-quadrant triggering capability ensures reliable gate activation across various control configurations

Triacs Applications

• On/off or phase angle control in general purpose AC switching systems
• High commutation capability applications requiring snubberless operation
• Value-sensitive appliances utilizing logic-level gate drive

Triacs Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number T1235T-6I with official STMicroelectronics documentation. Confirm that the TO-220AB insulated package matches the required specifications. Ensure compliance with RoHS directives and check for specific ordering suffixes if variant selection is necessary. Validate datasheet revisions before finalizing procurement decisions.

Triacs Selection Notes

Select this component when a 12 A RMS current rating and 600 V blocking voltage are required for AC load control. The insulated TO-220AB package is suitable for applications needing galvanic isolation between the heatsink and the circuit. Consider the three-quadrant triggering and snubberless characteristics for simplified circuit designs where high dV/dt immunity is beneficial.

Triacs Part Context

The T1235T-6I belongs to the T1235T series of Snubberless Triacs manufactured by STMicroelectronics. This series is characterized by its ability to operate without external snubber networks, reducing component count and cost. The device is part of a broader family of thyristors designed for robust AC switching performance in consumer and industrial electronics.

Triacs Replacement Considerations

The T1235T-8I serves as a direct substitute within the same series, offering identical 12 A current ratings but with an increased 800 V blocking voltage. Designers must verify that the higher voltage rating does not conflict with existing circuit constraints and that the thermal and mechanical footprints remain compatible.