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STMicroelectronics T1235-600G-TR — Discrete Semiconductors

STMicroelectronics T1235-600G-TR Snubberless™ Triac

MPNT1235-600G-TR
End of Life

STMicroelectronics Snubberless™ series, Alternistor - Snubberless triac, T1235-600G-TR, 600 V off-state, 12 A RMS on-state, surface mount D2PAK (TO-263-3), -40°C to 125°C junction temperature.

$2.02Ref. price · indicative, final on quote
STMicroelectronics T1235-600G-TR datasheet (PDF)
PackagingTO-263-3, D²Pak (2 Leads + Tab), TO-263AB
RoHSROHS3 Compliant
SeriesSnubberless™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

T1235-600G-TR specifications
ParameterValue
SeriesSnubberless™
Triac typeAlternistor - Snubberless
MountingSurface Mount
Voltage - off state600 V
Voltage - gate trigger (Vgt)1.3 V
Current - hold (Ih)35 mA
Current - gate trigger (Igt)35 mA
Current - on state (It (RMS))12 A
Current - non rep. surge 50, 60Hz120A, 126A
Operating temperature-40°C ~ 125°C (TJ)
PackageTape & Reel (TR); Cut Tape (CT)
ConfigurationSingle
CaseTO-263-3, D²Pak (2 Leads + Tab), TO-263AB

Product details

600 V, 12 A Snubberless™ alternistor in D2PAK

The STMicroelectronics T1235-600G-TR is a Snubberless™ alternistor triac rated for 600 V off-state voltage and 12 A RMS on-state current, housed in a surface-mount D2PAK (TO-263-3) package.

The D2PAK (TO-263-3) footprint is the same as a standard D²Pak with two leads plus the tab. The tab is the main terminal (MT2) and carries the full load current. The surface-mount package suits reflow soldering; the Tape & Reel (TR) variant is the ordering code for automated assembly. The Cut Tape (CT) option is available for prototype or low-volume builds.

The Snubberless™ series is an established ST product line with multiple current ratings sharing the same TO-263 footprint, so if a future design needs a higher current, the T2535-600G-TR (25 A) or T3035H-6G-TR (30 A) are pin-compatible surface-mount alternatives within the same series — both also Snubberless™ alternistors in D2PAK.

Frequently asked questions

What is the equivalent replacement for T1235-600G-TR?

Within the same Snubberless™ series, the T2535-600G-TR (25 A) and T3035H-6G-TR (30 A) are pin-compatible D2PAK alternistors with higher current ratings. For a through-hole alternative, the T1235H-6I (12 A, TO-220) shares the same 600 V off-state and Snubberless™ construction.

What is a snubberless triac?

A Snubberless™ triac is designed to switch inductive loads without an external RC snubber network. It achieves this through a higher dV/dt immunity and a more robust turn-off characteristic than a standard triac, reducing component count and board area.

What is the difference between alternistor and standard triac?

An alternistor triac has a different internal structure that provides higher dV/dt immunity and better commutating dI/dt capability than a standard triac. This makes it more suitable for inductive loads and reduces the risk of false triggering from line transients.

What is the pinout of T1235-600G-TR?

The D2PAK (TO-263-3) pinout is standard: pin 1 is Main Terminal 1 (MT1), pin 2 is Gate (G), and the tab is Main Terminal 2 (MT2). The tab is electrically active and must be isolated or connected to the load line as per the circuit design.