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STMicroelectronics BTA12-600SWRG — Discrete Semiconductors

ST BTA12-600SWRG Sensitive Gate Triac, 600V 12A TO-220

MPNBTA12-600SWRG
Active

STMicroelectronics BTA12-600SWRG, Logic - Sensitive Gate Triac, Single, 600V Off-State, 12A RMS On-State, 10mA Igt, TO-220-3 Through Hole, -40°C to 125°C.

$1.7900Ref. price · indicative, final on quote
STMicroelectronics BTA12-600SWRG datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

BTA12-600SWRG specifications
ParameterValue
Triac typeLogic - Sensitive Gate
MountingThrough Hole
Voltage - off state600 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, 60Hz120A, 126A
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-220-3

Product details

Sensitive-gate triac for logic-level AC switching

12 A RMS load current and surge capability

The 12 A RMS continuous rating covers resistive loads like heaters, incandescent lamps, and small motors up to about 2.5 kW on 230 VAC lines. Non-repetitive surge current is 120 A at 50 Hz and 126 A at 60 Hz — enough to handle inrush from motor starts or cold-filament lamp strikes without exceeding the die's thermal capacity. Holding current (Ih) is 15 mA maximum. Below this load current the triac will commutate off at zero-cross; designs driving very light loads — below 15 mA — may need a dummy resistor to guarantee latching.

The BTA12 base number is a long-running ST power-logic family; replacement risk is low for the foreseeable production horizon.

Frequently asked questions

What is the gate trigger current (Igt) of BTA12-600SWRG?

The maximum gate trigger current (Igt) is 10 mA. This sensitive-gate rating allows direct drive from a microcontroller GPIO or logic-level output through a series resistor.

What is the holding current (Ih) of BTA12-600SWRG?

The maximum holding current (Ih) is 15 mA. Below this load current the triac may not latch; designs with very light loads should include a bleeder resistor.

What is a sensitive gate triac and how does BTA12-600SWRG compare?

A sensitive-gate triac requires a lower gate trigger current — 10 mA for this part — versus 25-50 mA for a standard gate triac. This means the BTA12-600SWRG can be fired directly by a logic-level signal without a driver transistor, simplifying the BOM on microcontroller-based AC phase-control circuits.