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STMicroelectronics T2035H-8I — Discrete Semiconductors

STMicroelectronics T2035H-8I Triac, 800V, 20A

MPNT2035H-8I
End of Life

STMicroelectronics T2035H-8I, ECOPACK®2 series, Alternistor - Snubberless triac, 800 V off-state, 20 A RMS on-state, Single configuration, Through Hole, TO-220-3, TO-220AB Insulated, -40°C to 125°C.

$1.83Ref. price · indicative, final on quote
STMicroelectronics T2035H-8I datasheet (PDF)
PackagingTO-220-3
SeriesECOPACK®2
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

T2035H-8I specifications
ParameterValue
SeriesECOPACK®2
Triac typeAlternistor - Snubberless
MountingThrough Hole
Voltage - off state800 V
Voltage - gate trigger (Vgt)1.3 V
Current - hold (Ih)35 mA
Current - gate trigger (Igt)35 mA
Current - on state (It (RMS))20 A
Current - non rep. surge 50, 60Hz200A, 210A
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-220-3

Product details

20 A Snubberless triac for industrial AC switching

The STMicroelectronics T2035H-8I is a 20 A RMS Alternistor-Snubberless triac in a TO-220AB Insulated package, rated for 800 V off-state blocking. Its Snubberless construction allows direct drive of inductive loads—motors, solenoids, transformers—without the external RC snubber typically required by standard triacs, simplifying the BOM and saving board space. The fully isolated tab eliminates the insulating washer for metal-chassis mounting, a time-saver in panel assembly.

Ratings that define the load interface

The 20 A RMS on-state current covers continuous loads. The 200 A / 210 A non-repetitive surge capability handles capacitive loads and lamp cold-filament inrush.

The 125°C upper limit gives headroom for convection-cooled designs in sealed cabinets.

Mount directly to a heatsink or chassis without an insulating pad.

Frequently asked questions

Is T2035H-8I lead-free and RoHS compliant?

Yes, the T2035H-8I is part of the ECOPACK®2 series, which is ST's RoHS-compliant and halogen-free packaging family.

What is the difference between T2035H-8I and T2035H-6I?

The T2035H-8I has an 800 V off-state voltage rating, while the T2035H-6I is rated for 600 V. All other specifications—20 A RMS, Snubberless Alternistor type, TO-220AB Insulated package—are identical. Choose the -8I for 277 VAC line applications where additional voltage margin is required.

What is the closest functional second-source to T2035H-8I?

The T1635T-8FP is a 16 A, 800 V Alternistor-Snubberless triac in a TO-220FP fully isolated package, with a wider -40°C to 150°C junction temperature range. It is a functional alternative for designs that can accept the lower 16 A current rating and the different package footprint.