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STMicroelectronics ACST1035-8FP — Discrete Semiconductors

ST ACST1035-8FP TRIAC, 800V 10A TO-220FPAB

MPNACST1035-8FP
End of Life

ST ACST1035-8FP, Standard Triac, 800 V, 10 A, Through Hole, TO-220-3 Full Pack, -40°C to 150°C (TJ), Tube, Active.

$1.6Ref. price · indicative, final on quote
STMicroelectronics ACST1035-8FP datasheet (PDF)
PackagingTO-220-3 Full Pack
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ACST1035-8FP specifications
ParameterValue
Triac typeStandard
MountingThrough Hole
Operating temperature-40°C ~ 150°C (TJ)
PackageTube
CaseTO-220-3 Full Pack

Product details

800 V / 10 A AC switch for resistive and inductive loads

The ST ACST1035-8FP is a standard triac rated at 800 V and 10 A, housed in a TO-220FPAB full-pack package. This through-hole device switches AC loads directly — heaters, motors, lighting ballasts, solenoid valves — where a single triac replaces a relay or contactor.

Standard gate — expect higher gate current than logic-level triacs

This is a standard triac, not a logic-level or sensitive-gate type.

The TO-220FPAB package is a standard ST footprint, so second-sourcing with a functionally similar triac in the same package is straightforward if supply tightens.

TO-220FPAB — isolated tab, no mica washer needed

The full-pack TO-220-3 has the mounting hole and tab fully encapsulated. No insulating bushings or mica washers are required when bolting to a chassis or heatsink.

Frequently asked questions

Where can I buy ACST1035-8FP available via RFQ confirmation?

The ACST1035-8FP is available to order through independent distribution. Submit an RFQ for current pricing and availability — stock levels and lead times are confirmed at quote time, not published on this page.

What is the equivalent of ACST1035-8FP?

There is no direct second-source listed. The closest functional peer is the Z0410MH (600 V / 4 A, 125°C junction), but that part has lower voltage and current ratings. For a higher-current alternative, the T1635H-8I (800 V / 16 A, 125°C junction) offers more headroom but a lower temperature rating. Neither is a pin-for-pin replacement — verify the gate trigger requirements and thermal budget before substituting.

Is ACST1035-8FP suitable for AC load control?

Yes, this is a standard triac designed for AC line switching. The 800 V blocking voltage covers 240 VAC mains with margin for surges; the 10 A rating handles resistive loads like heaters and lighting, and derated inductive loads like small motors and solenoids. The 150°C junction temperature gives extra thermal margin for inrush or stalled-rotor conditions.