ACTT8-800C0TQ TRIAC Equivalent & Substitute Parts

Part Overview

The ACTT8-800C0TQ is a standard TRIAC thyristor manufactured by WeEn Semiconductors, rated for 800V off-state voltage and 8A on-state current in a TO-220AB package. This component is designed for AC switching applications requiring high voltage isolation and moderate current handling. The part is currently active in production with 994 units in stock.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative sourcing is required for supply chain optimization, or when design flexibility permits selection from multiple qualified manufacturers offering compatible electrical and mechanical specifications.

Key Parameters

Parameter	ACTT8-800C0TQ
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	8 A
Voltage - Gate Trigger (Vgt) (Max)	1 V
Current - Gate Trigger (Igt) (Max)	30 mA
Current - Hold (Ih) (Max)	35 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	80A, 88A
Triac Type	Standard
Package / Case	TO-220-3
Supplier Device Package	TO-220AB
Mounting Type	Through Hole
Operating Temperature	150°C (TJ)
Configuration	Single
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ACTT8-800C0TQ is determined by the following critical parameters:

Voltage - Off State: Must equal 800V
Current - On State (It (RMS)) (Max): Must be ≥ 8A
Package / Case: Must be TO-220-3
Mounting Type: Must be Through Hole
Configuration: Must be Single
Voltage - Gate Trigger (Vgt) (Max): Must be ≤ 1.3V for direct compatibility
Current - Gate Trigger (Igt) (Max): Must be ≤ 50mA
Current - Hold (Ih) (Max): Must be ≤ 40mA

Substitute parts are grouped into two categories:

Category 1: Standard TRIAC Type — Direct functional equivalents with identical electrical characteristics and standard TRIAC architecture.

Category 2: Alternistor - Snubberless TRIAC Type — Enhanced TRIAC variants with integrated snubberless technology, offering improved EMI performance and reduced external component requirements while maintaining voltage and current ratings.

Parameter Comparison

Parameter	ACTT8-800C0TQ	ACST830-8T	BTA08-800CW3G	2N6349AG	BTA10-800CWRG	Q8008RH4TP	T1235T-8T
Manufacturer	WeEn Semiconductors	STMicroelectronics	onsemi	Littelfuse Inc.	STMicroelectronics	Littelfuse Inc.	STMicroelectronics
Voltage - Off State	800 V	800 V	800 V	800 V	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	8 A	8 A	8 A	12 A	10 A	8 A	12 A
Voltage - Gate Trigger (Vgt) (Max)	1 V	1 V	1.1 V	2 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	30 mA	30 mA	35 mA	50 mA	35 mA	35 mA	35 mA
Current - Hold (Ih) (Max)	35 mA	30 mA	35 mA	40 mA	35 mA	35 mA	40 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	80A, 88A	80A, 84A	90A @ 60Hz	100A @ 60Hz	100A, 105A	83A, 100A	90A, 95A
Triac Type	Standard	Standard	Standard	Standard	Alternistor - Snubberless	Alternistor - Snubberless	Alternistor - Snubberless
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Supplier Device Package	TO-220AB	TO-220	TO-220AB	TO-220AB	TO-220	TO-220 Non-Isolated Tab	TO-220
Operating Temperature	150°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 150°C (TJ)
RoHS Status	Not specified	ROHS3 Compliant	Not specified	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Standard TRIAC Type)

ACST830-8T (STMicroelectronics) and BTA08-800CW3G (onsemi) are direct functional equivalents to the ACTT8-800C0TQ. Both maintain identical 800V/8A ratings with matching gate trigger and hold current specifications. ACST830-8T is ROHS3 compliant and operates across -40°C to 125°C. BTA08-800CW3G offers the highest inventory availability (20,718 units) among all substitutes. Both are suitable for applications where standard TRIAC performance is required without snubberless technology benefits.

Higher Current Capacity Alternatives (Standard TRIAC Type)

2N6349AG (Littelfuse Inc.) provides 12A on-state current capacity while maintaining 800V voltage rating. This part is suitable for applications requiring higher current handling than the original 8A specification. Gate trigger voltage is specified at 2V maximum, which is higher than the original part. ROHS3 compliance status is not specified.

Snubberless TRIAC Alternatives

BTA10-800CWRG (STMicroelectronics), Q8008RH4TP (Littelfuse Inc.), and T1235T-8T (STMicroelectronics) are Alternistor snubberless TRIAC variants. These parts integrate snubberless technology for improved EMI performance and reduced external component requirements. BTA10-800CWRG and T1235T-8T are ROHS3 compliant. T1235T-8T supports operating temperatures up to 150°C, matching the original part's maximum junction temperature. Q8008RH4TP features a non-isolated tab configuration. All three snubberless variants are suitable for applications where EMI reduction and simplified circuit design are beneficial.

Frequently Asked Questions (FAQ)

Q: Can ACST830-8T directly replace ACTT8-800C0TQ in all applications?

A: ACST830-8T is electrically compatible as a direct substitute. Both parts share identical 800V/8A ratings, gate trigger voltage of 1V maximum, and TO-220-3 package configuration. The primary difference is operating temperature range: ACST830-8T operates from -40°C to 125°C, while ACTT8-800C0TQ is rated to 150°C. Verify application temperature requirements before substitution.

Q: What is the difference between Standard TRIAC and Alternistor - Snubberless types?

A: Standard TRIACs require external snubber circuits to suppress voltage transients and reduce EMI. Alternistor snubberless TRIACs integrate this functionality internally, reducing external component count and improving EMI performance. Both types maintain identical voltage and current ratings. Snubberless variants are suitable for applications where simplified circuit design and improved EMI compliance are priorities.

Q: Is 2N6349AG suitable as a substitute if my application only requires 8A?

A: 2N6349AG is rated for 12A on-state current, exceeding the 8A requirement. The higher current rating does not prevent substitution in 8A applications. However, the gate trigger voltage is specified at 2V maximum, compared to 1V for ACTT8-800C0TQ. Verify gate drive circuit compatibility before substitution.

Q: What are the package differences between TO-220AB and TO-220?

A: Both designations refer to the same TO-220-3 case outline. TO-220AB and TO-220 are supplier-specific package designations. Mechanical compatibility is maintained across all listed substitutes. Verify PCB footprint and thermal management requirements for your specific application.

Q: Are all substitute parts ROHS3 compliant?

A: ACST830-8T, BTA10-800CWRG, Q8008RH4TP, and T1235T-8T are specified as ROHS3 compliant. ACTT8-800C0TQ, BTA08-800CW3G, and 2N6349AG do not have ROHS3 compliance specified in available documentation. Verify compliance requirements for your application and supply chain.

Q: Which substitute offers the best thermal performance?

A: T1235T-8T supports operating temperatures up to 150°C junction temperature, matching ACTT8-800C0TQ. All other substitutes are rated to 125°C maximum. For applications requiring maximum junction temperature operation, T1235T-8T is the appropriate selection.

Q: Can I use BTA10-800CWRG in place of ACTT8-800C0TQ?

A: BTA10-800CWRG is electrically compatible with 800V voltage rating and 10A current capacity exceeding the 8A requirement. The primary distinction is the Alternistor snubberless architecture, which provides integrated EMI suppression. Gate trigger voltage is 1.3V maximum, slightly higher than the original 1V specification. Substitution is suitable for applications where snubberless technology benefits are acceptable.

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