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STMicroelectronics T1635H-8I — Discrete Semiconductors

STMicroelectronics T1635H-8I Triac

MPNT1635H-8I
End of Life

STMicroelectronics ECOPACK®2 series, Standard Triac, Single, 800 V Off State, 16 A RMS On-State, Through Hole, TO-220-3, -40°C ~ 125°C.

$1.61Ref. price · indicative, final on quote
STMicroelectronics T1635H-8I datasheet (PDF)
PackagingTO-220-3
RoHSROHS3 Compliant
SeriesECOPACK®2
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

T1635H-8I specifications
ParameterValue
SeriesECOPACK®2
Triac typeStandard
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))16 A
Current - non rep. surge 50, 60Hz160A, 168A
Operating temperature-40°C ~ 125°C (TJ)
PackageTube
ConfigurationSingle
CaseTO-220-3

Product details

Standard triac for AC power switching

The STMicroelectronics T1635H-8I is a standard triac in the ECOPACK®2 series, rated for 800 V off-state voltage and 16 A RMS on-state current. It comes in a through-hole TO-220AB insulated package, making it a direct fit for AC power control in industrial and commercial equipment — motor speed drives, heater banks, lighting dimmers, and solid-state relay front-ends. The junction temperature range of -40°C to 125°C covers outdoor enclosures and engine-bay environments without derating concerns.

Lifecycle and sourcing

The T1635H-8I carries an Active lifecycle status with ROHS3 compliance. No last-time-buy or end-of-life notice is in effect. The ECOPACK®2 series designation means the package meets ST's halogen-free and antimony-free requirements. Sourced and quoted to order through independent distribution.

Package and mounting

The TO-220AB insulated package (supplier device package TO-220AB Insulated) eliminates the need for an external insulating washer when bolting to a heatsink. Through-hole mounting suits point-to-point wiring.

Frequently asked questions

What is the lifecycle status of T1635H-8I?

The T1635H-8I is Active in production with ROHS3 compliance. No end-of-life or last-time-buy notice is in effect, so it remains available for new designs and production runs.

What is the gate trigger current for T1635H-8I?

The maximum gate trigger current (Igt) is 35 mA, and the maximum gate trigger voltage (Vgt) is 1.3 V. This is a standard-gate triac, not a sensitive-gate type.

Is T1635H-8I suitable for AC switching?

Yes, the T1635H-8I is a standard triac rated for 800 V off-state and 16 A RMS on-state, designed for AC power control in applications like motor drives, lighting dimmers, and heater control.

What is the equivalent or replacement for T1635H-8I?

The T1635T-8FP is a Snubberless™ alternistor in the same TO-220 footprint with 800 V / 16 A ratings and a wider junction temperature range of -40°C to 150°C. The T1610T-8FP is a sensitive-gate logic triac with the same voltage and current ratings. Neither is a direct pin-for-pin substitute without reviewing the gate drive and snubber requirements.