MAC16HCDG TRIAC Equivalent & Substitute Parts

Part Overview

The MAC16HCDG is a standard TRIAC manufactured by Littelfuse Inc., rated for 400V off-state voltage and 16A on-state current in a TO-220AB through-hole package. This component is designed for AC switching and control applications requiring reliable thyristor performance across industrial and consumer electronics. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application continuity when the primary part becomes unavailable or when design requirements permit higher current ratings or alternative TRIAC architectures.

Substiute Parts

MAC16HCDG

Littelfuse Inc.In Stock: 781MAC16HCDG Datasheet

Current PartRFQ

Q4025R6TP

Littelfuse Inc.In Stock: 2808Q4025R6TP Datasheet

MFR RecommendedRFQ

MAC16DG

onsemiIn Stock: 9129MAC16DG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAC16HCDG are classified into two categories based on substitution criteria:

Parametric Equivalent (Direct Replacement): MAC16DG by onsemi matches all critical electrical parameters—400V off-state voltage, 16A on-state current, identical gate trigger specifications, and matching temperature range. This part is a true parametric equivalent suitable for direct substitution where packaging format (Bulk vs. Tube) is acceptable.

Functional Upgrade (Higher Current Rating): Q4025R6TP by Littelfuse Inc. operates at the same 400V voltage rating but provides increased on-state current capacity (25A vs. 16A) and implements Alternistor snubberless TRIAC architecture. This part is suitable for applications where higher current handling is required or where snubberless operation provides circuit advantages. Gate trigger parameters differ slightly (Vgt 1.3V vs. 1.5V, Igt 80mA vs. 50mA), reflecting the different TRIAC type.

All substitute parts maintain identical package format (TO-220AB), through-hole mounting, single configuration, and operating temperature range (-40°C to 125°C).

Parameter Comparison

Engineering Selection Recommendations

MAC16DG (onsemi) is the recommended parametric equivalent for direct replacement of MAC16HCDG. Both parts are Active status products with identical electrical specifications, temperature range, and package format. Selection of MAC16DG is appropriate when procurement from onsemi is preferred or when Littelfuse supply is constrained. Packaging differs (Bulk vs. Tube), which may affect handling and storage procedures but does not impact electrical performance or application compatibility.

Q4025R6TP (Littelfuse Inc.) is suitable as a functional upgrade when application requirements permit higher on-state current capacity (25A vs. 16A) or when snubberless TRIAC architecture is advantageous for circuit design. This part is recommended for new designs targeting higher current applications or for retrofit scenarios where increased current margin is desired. The Alternistor snubberless design may eliminate the need for external snubber networks in certain AC switching applications.

All three parts maintain Active product status, full RoHS3 compliance, REACH unaffected status, and EAR99 export classification. Selection should be based on current rating requirements, TRIAC architecture preference, and manufacturer availability.

Frequently Asked Questions (FAQ)

Q: Can MAC16DG directly replace MAC16HCDG in existing designs?

A: Yes. MAC16DG is a parametric equivalent with identical voltage rating (400V), on-state current (16A), gate trigger specifications, and operating temperature range. The primary difference is packaging format (Bulk vs. Tube) and manufacturer (onsemi vs. Littelfuse). No circuit modifications are required.

Q: When should Q4025R6TP be used instead of MAC16HCDG?

A: Q4025R6TP is appropriate when the application requires higher on-state current capacity (25A vs. 16A) or when snubberless TRIAC operation is beneficial. Both parts share the same 400V voltage rating and TO-220AB package, but Q4025R6TP provides increased current handling and different gate trigger characteristics. Circuit validation is necessary to confirm compatibility with the higher current rating and Alternistor architecture.

Q: Are all substitute parts compatible with TO-220AB PCB layouts?

A: Yes. MAC16HCDG, MAC16DG, and Q4025R6TP all use TO-220-3 package format with TO-220AB supplier device package designation. All three parts are through-hole mounted components with identical pin configuration and footprint compatibility.

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

A: Standard TRIACs (MAC16HCDG, MAC16DG) are conventional thyristor devices. Alternistor snubberless TRIACs (Q4025R6TP) incorporate internal design features that reduce or eliminate the need for external snubber networks in AC switching circuits. The snubberless design may simplify circuit design and reduce component count in certain applications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. MAC16HCDG, MAC16DG, and Q4025R6TP are all RoHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating.