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STMicroelectronics T835-800B — Discrete Semiconductors

STMicroelectronics T835-800B Triac, 800V, 8A, DPAK

MPNT835-800B
Active

STMicroelectronics T835-800B, Triac Alternistor - Snubberless, Single, 800 V Off State, 8 A RMS, Surface Mount DPAK, -40°C to 125°C.

$1.4300Ref. price · indicative, final on quote
STMicroelectronics T835-800B datasheet (PDF)
PackagingTO-252-3, DPak (2 Leads + Tab), SC-63
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

T835-800B specifications
ParameterValue
Triac typeAlternistor - Snubberless
MountingSurface Mount
Voltage - off state800 V
Voltage - gate trigger (Vgt)1.3 V
Current - hold (Ih)50 mA
Current - gate trigger (Igt)50 mA
Current - on state (It (RMS))8 A
Current - non rep. surge 50, 60Hz80A, 84A
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-252-3, DPak (2 Leads + Tab), SC-63

Product details

T835-800B — Snubberless 800V, 8A Triac in DPAK

The STMicroelectronics T835-800B is an Alternistor (Snubberless) triac rated for 800 V off-state voltage and 8 A RMS on-state current, housed in a surface-mount DPAK (TO-252) package. The Snubberless construction means it can switch inductive loads like small motors, relays, or solenoids without the external RC snubber network that a standard triac would require — a real BOM simplification.

The DPAK (TO-252) is a surface-mount package with two leads plus a tab (the tab is the main terminal). The tab is electrically live — ensure the PCB copper pour or heatsink is either isolated or at the same potential as MT2. The package code in the supplier device field is DPAK; the case style is TO-252-3.

Frequently asked questions

Is T835-800B a snubberless triac?

Yes. The T835-800B is an Alternistor (Snubberless) triac, meaning it does not require an external RC snubber network for inductive load switching. This simplifies the BOM and reduces board area.

What is the trigger current of T835-800B?

The maximum gate trigger current (Igt) is 50 mA, and the maximum gate trigger voltage (Vgt) is 1.3 V. This is compatible with standard optocoupler or logic-level transistor drive.

What is the equivalent or replacement for T835-800B?

No direct pin-compatible second source is recorded. The T810T-8FP is a through-hole 8 A, 800 V logic-level triac but in a TO-220FP package — it is a functional alternative if the board can accommodate the through-hole footprint.