ACTT12-800CTNQ TRIAC Equivalent & Substitute Parts

Part Overview

The ACTT12-800CTNQ is a standard TRIAC manufactured by WeEn Semiconductors, rated for 800V off-state voltage and 12A on-state current in a TO-220AB through-hole package. This component is designed for AC switching applications requiring high voltage isolation and moderate current handling. The part is active and RoHS compliant, with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching or exceeding the electrical performance specifications while maintaining compatible mechanical packaging and thermal characteristics. Substitution becomes necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified sources.

Key Parameters

Parameter	ACTT12-800CTNQ
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	12 A
Voltage - Gate Trigger (Vgt) (Max)	1 V
Current - Gate Trigger (Igt) (Max)	35 mA
Current - Hold (Ih) (Max)	30 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	120A, 132A
Operating Temperature (TJ)	150°C
Package / Case	TO-220-3
Mounting Type	Through Hole
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the ACTT12-800CTNQ is determined by the following critical parameters:

Voltage Rating (Off State): Must equal or exceed 800V to maintain isolation capability
Current Rating (On State): Must equal or exceed 12A RMS to handle design current requirements
Package Type: Must be TO-220-3 or TO-220AB compatible for mechanical and thermal compatibility
Gate Trigger Voltage (Vgt): Lower or equal values ensure reliable gate drive compatibility
Gate Trigger Current (Igt): Lower or equal values reduce gate drive circuit requirements
Operating Temperature Range: Must support the application's thermal environment
Compliance: RoHS and REACH status for regulatory alignment

The substitute parts identified below meet these criteria across different TRIAC architectures (Standard and Alternistor - Snubberless types) and manufacturers (STMicroelectronics, Littelfuse Inc.).

Parameter Comparison

Parameter	ACTT12-800CTNQ	BTA12-800CWRG	BTB12-800CWRG	MAC15A10G	MAC15NG	T1625T-8I
Manufacturer	WeEn Semiconductors	STMicroelectronics	STMicroelectronics	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics
Voltage - Off State	800 V	800 V	800 V	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	12 A	12 A	12 A	15 A	15 A	16 A
Voltage - Gate Trigger (Vgt) (Max)	1 V	1.3 V	1.3 V	2 V	1.5 V	1.3 V
Current - Gate Trigger (Igt) (Max)	35 mA	35 mA	35 mA	50 mA	35 mA	25 mA
Current - Hold (Ih) (Max)	30 mA	35 mA	35 mA	40 mA	40 mA	35 mA
Operating Temperature (TJ)	150°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Triac Type	Standard	Alternistor - Snubberless	Alternistor - Snubberless	Standard	Standard	Standard
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Current Rating Match (12A): BTA12-800CWRG and BTB12-800CWRG from STMicroelectronics provide exact current rating equivalence to the ACTT12-800CTNQ. Both are Alternistor - Snubberless architecture variants with ROHS3 compliance. The primary distinction is packaging: BTA12-800CWRG uses TO-220AB Insulated, while BTB12-800CWRG uses standard TO-220. Both maintain 800V off-state voltage and support gate trigger specifications compatible with the original design.

Higher Current Rating (15A - 16A): MAC15A10G, MAC15NG, and T1625T-8I exceed the 12A requirement with 15A or 16A ratings. These parts provide design margin for current handling and are suitable when application requirements permit higher current capacity. MAC15NG offers the lowest gate trigger voltage (1.5V) among the 15A options. T1625T-8I supports the highest operating temperature (150°C), matching the ACTT12-800CTNQ thermal specification.

Compliance and Availability: All substitute parts carry ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment. Inventory levels across all substitutes exceed 1,200 units, supporting production requirements.

Temperature Consideration: The ACTT12-800CTNQ specifies 150°C maximum junction temperature. T1625T-8I matches this specification. BTA12-800CWRG, BTB12-800CWRG, MAC15A10G, and MAC15NG are rated to 125°C maximum, which may require thermal design review in high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can BTA12-800CWRG directly replace ACTT12-800CTNQ in existing designs?

A: Yes. Both parts share identical voltage (800V) and current (12A) ratings, matching package type (TO-220-3), and compatible gate trigger specifications. The primary difference is the Alternistor - Snubberless architecture in the BTA12-800CWRG, which may reduce EMI in switching applications. Verify thermal requirements, as BTA12-800CWRG is rated to 125°C versus 150°C for the ACTT12-800CTNQ.

Q: What is the difference between BTA12-800CWRG and BTB12-800CWRG?

A: Both parts are electrically identical with 800V, 12A ratings and Alternistor - Snubberless architecture. The difference is packaging: BTA12-800CWRG uses TO-220AB Insulated, while BTB12-800CWRG uses standard TO-220. Select based on PCB layout requirements and isolation specifications.

Q: Can I use MAC15NG or MAC15A10G as substitutes if my design only requires 12A?

A: Yes. Both parts exceed the 12A requirement with 15A ratings, providing design margin. MAC15NG has a lower gate trigger voltage (1.5V) compared to MAC15A10G (2V), making it more compatible with lower-power gate drive circuits. Both are rated to 125°C maximum junction temperature.

Q: Why does T1625T-8I have a lower gate trigger current (25mA) than the ACTT12-800CTNQ (35mA)?

A: Lower gate trigger current indicates more sensitive gate response, reducing gate drive circuit power requirements. This is an advantage in designs with limited gate drive capability. T1625T-8I also supports 150°C junction temperature, matching the original part's thermal rating.

Q: Are all substitute parts available in the same packaging?

A: All parts use TO-220-3 package type. Supplier device packages vary slightly: ACTT12-800CTNQ, BTA12-800CWRG, MAC15A10G, MAC15NG, and T1625T-8I use TO-220AB variants, while BTB12-800CWRG uses standard TO-220. Verify PCB footprint compatibility before selection.

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

A: Alternistor - Snubberless architecture (BTA12-800CWRG, BTB12-800CWRG) reduces EMI and switching noise compared to Standard types. Standard TRIACs (ACTT12-800CTNQ, MAC15NG, MAC15A10G, T1625T-8I) may require external snubber circuits in noise-sensitive applications. Both types are electrically compatible when voltage and current ratings match.

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