MAC12HCDG TRIAC Equivalent & Substitute Parts

Part Overview

The MAC12HCDG is a standard TRIAC thyristor manufactured by Littelfuse Inc., rated for 400V off-state voltage and 12A on-state current in a TO-220AB through-hole package. This component is actively produced and widely used in AC switching and control applications. Substitute parts may be required due to inventory constraints, application-specific performance needs, or design optimization for higher voltage or current ratings while maintaining compatible package and thermal characteristics.

Substiute Parts

MAC12HCDG

Littelfuse Inc.In Stock: 4875MAC12HCDG Datasheet

Current PartRFQ

Q4025R6TP

Littelfuse Inc.In Stock: 2808Q4025R6TP Datasheet

MFR RecommendedRFQ

BTB12-600BWRG

STMicroelectronicsIn Stock: 2078BTB12-600BWRG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAC12HCDG is determined by the following criteria:

Primary Compatibility Requirements:

• Mounting type: Through Hole (TO-220 package family)
• Configuration: Single TRIAC
• Operating temperature range: -40°C ~ 125°C (TJ) minimum
• RoHS3 compliance and REACH unaffected status

Allowable Parameter Variations:

• Voltage - Off State: Equal to or greater than 400V
• Current - On State (It (RMS)): Equal to or greater than 12A
• Voltage - Gate Trigger (Vgt): Equal to or less than 1.5V
• Current - Gate Trigger (Igt): Equal to or less than 50mA
• Current - Hold (Ih): Equal to or less than 60mA

Both substitute parts meet these criteria while offering enhanced performance characteristics in specific parameters.

Parameter Comparison

Engineering Selection Recommendations

Q4025R6TP Selection Criteria: The Q4025R6TP offers increased current handling capacity at 25A on-state current while maintaining the same 400V voltage rating. This substitute is suitable for applications requiring higher current capacity within the same voltage class. Both parts are manufactured by Littelfuse Inc. and maintain identical thermal operating ranges and RoHS3 compliance.

BTB12-600BWRG Selection Criteria: The BTB12-600BWRG provides enhanced voltage rating at 600V off-state while maintaining the 12A current specification of the original part. This substitute is appropriate for applications requiring higher voltage withstand capability. Manufactured by STMicroelectronics, it maintains identical thermal operating ranges and RoHS3 compliance. The gate trigger voltage is improved at 1.3V maximum.

Both substitutes are active products with confirmed inventory availability and meet all regulatory compliance requirements specified for the MAC12HCDG.

Frequently Asked Questions (FAQ)

Q: Can Q4025R6TP replace MAC12HCDG in all applications? A: Q4025R6TP is electrically compatible for direct substitution in circuits designed for MAC12HCDG. The higher current rating (25A vs 12A) provides additional margin but does not prevent operation in lower-current applications. Verify circuit design does not depend on the specific current limitation of the original part.

Q: What is the primary difference between Q4025R6TP and BTB12-600BWRG? A: Q4025R6TP maintains 400V voltage rating with increased current capacity (25A). BTB12-600BWRG maintains 12A current rating with increased voltage capacity (600V). Select based on whether your application requires higher current handling or higher voltage withstand.

Q: Are all three parts pin-compatible? A: Yes. All three parts use TO-220-3 package configuration with identical through-hole mounting. PCB layout and thermal management considerations remain consistent across substitutions.

Q: Do the substitute parts require different gate drive circuits? A: Both substitutes have gate trigger voltage specifications (1.3V maximum) that are equal to or better than the original MAC12HCDG (1.5V maximum). Existing gate drive circuits designed for MAC12HCDG will operate with both substitutes.

Q: What is the difference between Standard TRIAC and Alternistor - Snubberless types? A: This distinction is provided in the part specifications. Both substitute parts are classified as Alternistor - Snubberless type, while the original MAC12HCDG is Standard type. Consult application requirements to determine if this classification difference affects circuit performance.