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STMicroelectronics T1210T-8T — Discrete Semiconductors

STMicroelectronics T1210T-8T Triac, 800V 12A, TO-220-3

MPNT1210T-8T
End of Life

STMicroelectronics T1210T-8T, Logic - Sensitive Gate Triac, Single, 800 V Off State, 12 A RMS, 10 mA Igt, TO-220-3, Tube, -40°C to 150°C.

$1.61Ref. price · indicative, final on quote
STMicroelectronics T1210T-8T datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

T1210T-8T specifications
ParameterValue
Triac typeLogic - Sensitive Gate
MountingThrough Hole
Voltage - off state800 V
Voltage - gate trigger (Vgt)1.3 V
Current - hold (Ih)15 mA
Current - gate trigger (Igt)10 mA
Current - on state (It (RMS))12 A
Current - non rep. surge 50, 60Hz90A, 95A
Operating temperature-40°C ~ 150°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-220-3

Product details

The STMicroelectronics T1210T-8T is a sensitive-gate logic-level triac rated for 800 V off-state voltage and 12 A RMS on-state current. Packaged in a through-hole TO-220-3, it is designed for AC load switching in applications like solid-state relays, motor speed controllers, lighting dimmers, and heater controls. The sensitive gate (10 mA max Igt) allows direct triggering from low-voltage logic or microcontroller GPIO without an additional driver transistor.

There is no last-time-buy or obsolescence risk on this line item.

Frequently asked questions

What is the gate trigger current (Igt) of T1210T-8T?

The maximum gate trigger current (Igt) is 10 mA. This sensitive-gate rating allows direct drive from logic-level signals.

What is the equivalent part for T1210T-8T if not available?

The closest functional equivalent is the T1210T-8FP, which shares the same 800 V off-state voltage, 12 A RMS current, sensitive-gate trigger, and TO-220 package but in a different lead form (full-pack isolated). Verify thermal and mounting compatibility before substituting.

Can T1210T-8T be used for inductive load switching?

Yes, the sensitive gate and 15 mA holding current are suitable for inductive loads such as small motors, solenoids, and transformers. Ensure the load current stays above the holding current at the minimum operating voltage. For highly inductive loads, add a snubber circuit across the triac to limit dV/dt.