ACTT12-800CTQ TRIAC Equivalent & Substitute Parts

Part Overview

The ACTT12-800CTQ is a standard TRIAC thyristor 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 classified as Active product status and is RoHS Compliant. Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory availability, supply chain considerations, or specific performance characteristics within the allowed electrical and mechanical parameter ranges for this thyristor category.

Key Parameters

Parameter	Value	Unit
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)	50	mA
Current - Non Rep. Surge 50Hz	120	A
Current - Non Rep. Surge 60Hz	132	A
Operating Temperature (TJ)	150	°C
Package / Case	TO-220-3	-
Mounting Type	Through Hole	-
Configuration	Single	-

Substitute Part Grouping Explanation

Substitution eligibility for the ACTT12-800CTQ is determined by the following criteria:

Primary Matching Parameters:

Voltage - Off State: 800V (exact match required)
Package / Case: TO-220-3 (exact match required)
Mounting Type: Through Hole (exact match required)
Configuration: Single (exact match required)

Secondary Compatibility Parameters:

Current - On State (It (RMS)) (Max): 12A minimum (equal or higher current rating acceptable)
Voltage - Gate Trigger (Vgt) (Max): Within standard thyristor gate trigger voltage range
Current - Gate Trigger (Igt) (Max): Within standard thyristor specifications
Current - Hold (Ih) (Max): Within standard thyristor specifications

Substitute parts are grouped into two categories based on current rating: direct 12A equivalents and higher-rated 16A alternatives that maintain full backward compatibility with 12A applications.

Parameter Comparison

Parameter	ACTT12-800CTQ (WeEn)	BTA12-800BRG (STM)	BTA12-800BWRG (STM)	BTB12-800BW3G (onsemi)	MAC16NG (Littelfuse)	T1635T-8I (STM)
Voltage - Off State	800V	800V	800V	800V	800V	800V
Current - On State (It (RMS)) (Max)	12A	12A	12A	12A	16A	16A
Voltage - Gate Trigger (Vgt) (Max)	1V	1.3V	1.3V	1.1V	1.5V	1.3V
Current - Gate Trigger (Igt) (Max)	35mA	50mA	50mA	50mA	50mA	35mA
Current - Hold (Ih) (Max)	50mA	50mA	50mA	50mA	50mA	45mA
Current - Non Rep. Surge 50Hz	120A	120A	120A	120A	150A	120A
Current - Non Rep. Surge 60Hz	132A	126A	126A	120A	150A	126A
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
Triac Type	Standard	Standard	Alternistor - Snubberless	Standard	Standard	Alternistor - Snubberless
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Supplier Device Package	TO-220AB	TO-220AB Insulated	TO-220AB Insulated	TO-220AB	TO-220AB	TO-220AB Insulated
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct 12A Equivalents (Recommended for Pin-Compatible Replacement):

BTA12-800BRG and BTB12-800BW3G are direct current-rated equivalents to the ACTT12-800CTQ. Both maintain 12A on-state current rating, 800V off-state voltage, and TO-220AB packaging. BTA12-800BRG is manufactured by STMicroelectronics with ROHS3 Compliant status and REACH Unaffected designation. BTB12-800BW3G is manufactured by onsemi and available in bulk packaging. Both parts are Active product status.

Snubberless Alternistor Options (Enhanced Performance Characteristics):

BTA12-800BWRG (STMicroelectronics) is a Snubberless Alternistor variant maintaining 12A current rating and 800V voltage rating. This part offers reduced EMI and improved switching characteristics compared to standard TRIAC designs. Operating temperature range is -40°C to 125°C with ROHS3 Compliant and REACH Unaffected status.

Higher Current Rated Alternatives (16A Rated):

MAC16NG (Littelfuse Inc.) and T1635T-8I (STMicroelectronics) are rated for 16A on-state current, providing increased current capacity while maintaining 800V off-state voltage and TO-220AB packaging. MAC16NG is a standard TRIAC with ROHS3 Compliant status. T1635T-8I is a Snubberless Alternistor with operating temperature range of -40°C to 150°C, matching the maximum junction temperature of the ACTT12-800CTQ. Both parts are Active product status.

All substitute parts maintain the same package footprint, mounting type, and electrical classification as the ACTT12-800CTQ, ensuring mechanical and functional compatibility within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can BTA12-800BRG directly replace ACTT12-800CTQ in existing designs?

A: Yes. BTA12-800BRG maintains identical voltage rating (800V), current rating (12A), package type (TO-220AB), and mounting configuration (through-hole). Both are single-configuration TRIACs. The primary difference is gate trigger voltage specification (1.3V maximum versus 1V maximum), which remains within acceptable thyristor operating parameters.

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

A: Snubberless Alternistor designs (BTA12-800BWRG, T1635T-8I) incorporate internal snubber networks to reduce EMI and improve switching performance. Standard TRIAC designs (BTA12-800BRG, BTB12-800BW3G, MAC16NG) do not include this feature. Both types are electrically compatible for the specified voltage and current parameters.

Q: Are 16A rated parts (MAC16NG, T1635T-8I) suitable for 12A applications?

A: Yes. Higher current-rated thyristors are backward compatible with lower current applications. A 16A-rated TRIAC can safely operate in circuits designed for 12A maximum current. The higher rating provides additional design margin and thermal headroom.

Q: What is the significance of TO-220AB Insulated versus standard TO-220AB packaging?

A: TO-220AB Insulated packaging includes an internal isolation layer between the die and the metal tab, reducing the risk of electrical leakage through the mounting surface. Standard TO-220AB packaging does not include this isolation. Both are mechanically compatible with standard TO-220 mounting hardware. Application requirements determine which variant is appropriate.

Q: Which substitute part has the highest operating temperature rating?

A: T1635T-8I supports operating junction temperature up to 150°C, matching the ACTT12-800CTQ specification. BTA12-800BRG, BTA12-800BWRG, BTB12-800BW3G, and MAC16NG are rated to 125°C maximum junction temperature.

Q: Are all substitute parts RoHS compliant?

A: BTA12-800BRG, BTA12-800BWRG, MAC16NG, and T1635T-8I are ROHS3 Compliant. BTB12-800BW3G RoHS status is not specified in available documentation. ACTT12-800CTQ is RoHS Compliant.

Q: What inventory availability should be considered for component selection?

A: BTA12-800BWRG (22,200 pcs), BTA12-800BRG (22,284 pcs), and T1635T-8I (25,400 pcs) have the highest stock levels. BTB12-800BW3G (9,713 pcs) and MAC16NG (1,296 pcs) have lower availability. ACTT12-800CTQ has 831 pcs in stock.

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