ACTT12-800CQ TRIAC Equivalent & Substitute Parts

Part Overview

The ACTT12-800CQ 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 active and in production with 1005 units currently in stock. Alternative equivalent parts are necessary to address supply chain flexibility, regional availability, and specific application requirements where substitute devices meet or exceed the electrical and mechanical specifications of the original part.

Substiute Parts

ACTT12-800CQ

WeEn SemiconductorsIn Stock: 1107ACTT12-800CQ Datasheet

Current PartRFQ

BTA12-800BRG

STMicroelectronicsIn Stock: 22370BTA12-800BRG Datasheet

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BTA12-800BWRG

STMicroelectronicsIn Stock: 22275BTA12-800BWRG Datasheet

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BTB12-800BW3G

onsemiIn Stock: 9772BTB12-800BW3G Datasheet

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MAC16NG

Littelfuse Inc.In Stock: 1368MAC16NG Datasheet

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T1635T-8I

STMicroelectronicsIn Stock: 25456T1635T-8I Datasheet

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Key Parameters

Substitute Part Grouping Explanation

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

Primary Matching Criteria:

• Voltage - Off State: 800 V (exact match required)
• Current - On State (It (RMS)) (Max): 12 A minimum
• Package / Case: TO-220-3
• Mounting Type: Through Hole

Secondary Compatibility Parameters:

• Voltage - Gate Trigger (Vgt) (Max): Must not exceed 1.3 V
• Current - Gate Trigger (Igt) (Max): Must not exceed 50 mA
• Current - Hold (Ih) (Max): Must not exceed 50 mA
• Operating Temperature: Must support minimum 125°C

Substitute parts are grouped into two categories:

Category A - Direct Current Rating Match (12A): BTA12-800BRG and BTA12-800BWRG from STMicroelectronics, and BTB12-800BW3G from onsemi. These devices maintain the 12A on-state current specification and meet all electrical parameter requirements.

Category B - Upgraded Current Rating (16A): MAC16NG from Littelfuse Inc. and T1635T-8I from STMicroelectronics. These devices exceed the 12A requirement with 16A on-state current capability, providing additional design margin while maintaining 800V voltage rating and TO-220AB packaging.

Parameter Comparison

Engineering Selection Recommendations

BTA12-800BRG and BTA12-800BWRG (STMicroelectronics): Both devices are ROHS3 compliant with extended operating temperature range (-40°C to 125°C). BTA12-800BWRG is classified as an Alternistor - Snubberless variant, offering enhanced performance characteristics. Both maintain 12A current rating with slightly elevated gate trigger voltage (1.3V vs. 1V). High inventory availability (22284 and 22200 units respectively) supports supply chain continuity.

BTB12-800BW3G (onsemi): Standard TRIAC with 12A rating and gate trigger voltage of 1.1V, closest to the original specification. Extended operating temperature range (-40°C to 125°C). Available in bulk packaging with 9713 units in stock.

MAC16NG (Littelfuse Inc.): Upgraded 16A current rating provides additional design margin. ROHS3 compliant with extended operating temperature to 150°C. Gate trigger voltage of 1.5V is within acceptable limits. Suitable for applications requiring higher current capacity within the same voltage class.

T1635T-8I (STMicroelectronics): Alternistor - Snubberless variant with 16A current rating and extended operating temperature to 150°C. Gate trigger current matches original specification at 35mA. ROHS3 compliant with highest inventory availability (25400 units). Recommended for applications benefiting from snubberless technology and elevated temperature operation.

Frequently Asked Questions (FAQ)

Q: Can BTA12-800BRG directly replace ACTT12-800CQ in existing designs? A: Yes. BTA12-800BRG maintains identical voltage and current ratings with compatible gate trigger parameters within acceptable limits. The TO-220AB package and through-hole mounting are identical. Pin configuration is standard for TRIAC devices in this package class.

Q: What is the difference between standard TRIAC and Alternistor - Snubberless variants? A: Alternistor - Snubberless devices (BTA12-800BWRG and T1635T-8I) incorporate internal snubber networks, reducing external component requirements in AC switching applications. Both variants meet the electrical specifications of the ACTT12-800CQ.

Q: Why do some substitute parts have 16A rating instead of 12A? A: MAC16NG and T1635T-8I provide higher current capacity within the same 800V voltage class and TO-220AB package. These devices are fully compatible substitutes that offer additional design margin for applications approaching the 12A limit.

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.

Q: What is the impact of different gate trigger voltage specifications? A: Gate trigger voltage differences (1V to 1.5V) are within normal TRIAC parameter variation. All substitute parts remain compatible with standard gate drive circuits designed for 800V TRIACs. Circuit performance is not affected within these specification ranges.

Q: Can I use parts with extended temperature ratings (-40°C to 150°C) in place of the original 125°C specification? A: Yes. Extended temperature ratings provide additional operational margin and are fully backward compatible. Applications limited to 125°C operation are unaffected by higher temperature ratings.

Q: What packaging differences exist among substitute parts? A: ACTT12-800CQ is supplied in tube packaging. Substitute parts are available in tube (BTA12-800BRG, BTA12-800BWRG, T1635T-8I), bulk (BTB12-800BW3G), and box (MAC16NG) packaging. All use identical TO-220AB component packaging for PCB mounting.