MAC212A10 TRIAC 800V 12A Equivalent & Substitute Parts

Part Overview

The MAC212A10 is a standard TRIAC rated for 800V off-state voltage and 12A on-state current in a TO-220AB through-hole package, manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The MAC212A10 remains functionally available through direct manufacturer variants and cross-compatible alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

MAC212A10

onsemiIn Stock: 5670MAC212A10 Datasheet

Current PartRFQ

MAC212A10G

onsemiIn Stock: 5095MAC212A10G Datasheet

DirectRFQ

MAC212A10G

onsemiIn Stock: 5095MAC212A10G Datasheet

DirectRFQ

BT138-800,127

WeEn SemiconductorsIn Stock: 7095BT138-800,127 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MAC212A10 is determined by strict equivalence across the following critical parameters:

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

Substitute parts are grouped into two categories:

Direct Equivalent (MAC212A10G): Identical electrical specifications and packaging. Differs only in product status (Active vs. Obsolete) and packaging format (Bulk vs. standard).

Similar Alternative (BT138-800,127): Meets all critical electrical parameters and mechanical requirements. Manufactured by WeEn Semiconductors with Active product status and RoHS3 compliance. Minor variations exist in gate trigger voltage (1.5V vs. 2V maximum) and gate trigger current (35mA vs. 50mA maximum), which remain within acceptable substitution tolerances for standard TRIAC applications.

Parameter Comparison

Engineering Selection Recommendations

MAC212A10G is the primary substitute for the obsolete MAC212A10. Both components are manufactured by onsemi with identical electrical and mechanical specifications. MAC212A10G carries Active product status, ensuring long-term availability and supply chain continuity. Selection of MAC212A10G requires no circuit modifications and provides direct pin-for-pin compatibility.

BT138-800,127 serves as a secondary alternative manufactured by WeEn Semiconductors. This component meets all critical electrical parameters and maintains TO-220-3 through-hole packaging. BT138-800,127 offers RoHS3 compliance, which may be required for applications subject to environmental regulations. The lower gate trigger voltage (1.5V vs. 2V) and reduced gate trigger current (35mA vs. 50mA) represent improved performance characteristics suitable for gate drive circuit optimization. Operating temperature specification differs (125°C maximum vs. -40°C to 125°C range), which must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can MAC212A10G be used as a direct replacement for MAC212A10?

A: Yes. MAC212A10G is electrically and mechanically identical to MAC212A10. Both components share the same voltage rating (800V), current rating (12A), gate trigger specifications, and TO-220-3 package. The primary difference is product status: MAC212A10G is Active while MAC212A10 is Obsolete.

Q: What are the key differences between MAC212A10 and BT138-800,127?

A: Both components meet the critical specifications: 800V off-state voltage, 12A on-state current, and TO-220-3 through-hole packaging. BT138-800,127 has a lower gate trigger voltage (1.5V vs. 2V maximum) and reduced gate trigger current (35mA vs. 50mA maximum). BT138-800,127 also provides RoHS3 compliance and is manufactured by WeEn Semiconductors rather than onsemi.

Q: Is the lower gate trigger voltage of BT138-800,127 a concern?

A: No. A lower gate trigger voltage represents an advantage, as it requires less gate drive power to activate the TRIAC. This characteristic is suitable for applications with limited gate drive capability.

Q: Does BT138-800,127 require circuit modifications?

A: No circuit modifications are required. BT138-800,127 maintains identical pin configuration and TO-220-3 package geometry. Gate drive circuits may benefit from the lower trigger voltage, but existing designs will function without modification.

Q: Which substitute should be selected for new designs?

A: Selection depends on specific requirements. MAC212A10G is recommended for direct replacement of existing MAC212A10 designs. BT138-800,127 is recommended for new designs requiring RoHS3 compliance or applications where reduced gate drive power is beneficial.

Q: Are all three components pin-compatible?

A: Yes. MAC212A10, MAC212A10G, and BT138-800,127 all use TO-220-3 packaging with identical pin configuration and mechanical dimensions, ensuring direct physical and electrical compatibility.