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MAC12HCM TRIAC 600V 12A Equivalent & Substitute Parts
Part Overview
The MAC12HCM is a standard TRIAC thyristor rated for 600V off-state voltage and 12A on-state current in a TO-220-3 through-hole package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and compliance with current regulatory standards.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Voltage - Off State | 600 V |
| Current - On State (It (RMS)) (Max) | 12 A |
| Voltage - Gate Trigger (Vgt) (Max) | 1.5 V |
| Current - Non Rep. Surge 50, 60Hz (Itsm) | 100A @ 60Hz |
| Current - Gate Trigger (Igt) (Max) | 50 mA |
| Current - Hold (Ih) (Max) | 60 mA |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | TO-220-3 |
| Mounting Type | Through Hole |
| Configuration | Single |
Substitute Part Grouping Explanation
Substitution of the MAC12HCM is determined by the following critical parameters:
- Voltage - Off State: 600 V (mandatory match)
- Current - On State (It (RMS)) (Max): 12 A (mandatory match)
- Package / Case: TO-220-3 (mandatory match for mechanical compatibility)
- Mounting Type: Through Hole (mandatory match)
- Configuration: Single (mandatory match)
Substitute parts are grouped into two categories:
Direct Equivalent (Identical Electrical Specifications): MAC12HCMG from Littelfuse Inc. provides identical electrical parameters with active product status and improved compliance.
Functional Equivalents (Matching Core Ratings): BT138-600G,127, BT138-600G0Q, BT138-600G0TQ, BTA12-600BW3G, and BTA12-600CW3G maintain the 600V/12A core ratings and TO-220-3 package. These parts may exhibit variations in gate trigger voltage, gate trigger current, and hold current within acceptable engineering tolerances for standard TRIAC applications.
Lower Current Alternatives (8A and 10A): BTA08-600BRG, BTA08-600BW3G, BTA08-600BWRG, and BTA10-600BWRG are suitable only for applications where 8A or 10A on-state current is acceptable. These are not direct substitutes but represent downrated alternatives.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Off State | Current - On State (Max) | Vgt (Max) | Itsm @ 60Hz | Igt (Max) | Ih (Max) | Operating Temp | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| MAC12HCM | onsemi | 600 V | 12 A | 1.5 V | 100A | 50 mA | 60 mA | -40°C ~ 125°C | TO-220-3 | Obsolete |
| MAC12HCMG | Littelfuse Inc. | 600 V | 12 A | 1.5 V | 100A | 50 mA | 60 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BT138-600G,127 | NXP USA Inc. | 600 V | 12 A | 1.5 V | 95A, 105A | 50 mA | 60 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BT138-600G0Q | WeEn Semiconductors | 600 V | 12 A | 1 V | 95A, 105A | 100 mA | 60 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BT138-600G0TQ | WeEn Semiconductors | 600 V | 12 A | 1 V | 95A, 105A | 100 mA | 60 mA | -40°C ~ 150°C | TO-220-3 | Active |
| BTA12-600BW3G | onsemi | 600 V | 12 A | 1.1 V | 105A | 50 mA | 50 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BTA12-600CW3G | Littelfuse Inc. | 600 V | 12 A | 1.1 V | 105A | 35 mA | 45 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BTA08-600BRG | STMicroelectronics | 600 V | 8 A | 1.3 V | 80A, 84A | 50 mA | 50 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BTA08-600BW3G | onsemi | 600 V | 8 A | 1.1 V | 90A | 50 mA | 60 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BTA08-600BWRG | STMicroelectronics | 600 V | 8 A | 1.3 V | 80A, 84A | 50 mA | 50 mA | -40°C ~ 125°C | TO-220-3 | Active |
| BTA10-600BWRG | STMicroelectronics | 600 V | 10 A | 1.3 V | 100A, 105A | 50 mA | 50 mA | -40°C ~ 125°C | TO-220-3 | Active |
Engineering Selection Recommendations
Primary Recommendation: MAC12HCMG (Littelfuse Inc.) is the direct equivalent replacement. It maintains identical electrical specifications and operating temperature range while offering active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment.
Secondary Recommendations for 12A Applications:
BT138-600G,127 (NXP USA Inc.) provides 12A capability with active status and high inventory availability. Gate trigger specifications match the original part.
BTA12-600BW3G (onsemi) and BTA12-600CW3G (Littelfuse Inc.) are active alternatives with 12A ratings. BTA12-600CW3G offers RoHS3 compliance and REACH compliance certification.
BT138-600G0Q and BT138-600G0TQ (WeEn Semiconductors) support 12A operation with lower gate trigger voltage (1V) and higher gate trigger current (100mA). BT138-600G0TQ extends operating temperature to 150°C.
Downrated Alternatives (Current Reduction Required):
BTA10-600BWRG (STMicroelectronics) provides 10A on-state current with Snubberless TRIAC technology and RoHS3 compliance. Suitable only where 10A maximum current is acceptable.
BTA08-600BRG, BTA08-600BW3G, and BTA08-600BWRG provide 8A on-state current. These are suitable only for applications with reduced current requirements.
Frequently Asked Questions (FAQ)
Q: Can I use BTA08 or BTA10 series parts as direct replacements for MAC12HCM?
A: No. BTA08 series parts are rated for 8A maximum on-state current, and BTA10 series for 10A. The MAC12HCM is rated for 12A. Using lower-rated parts in 12A applications will result in component failure. These parts are suitable only for applications where the circuit current requirement does not exceed their respective ratings.
Q: What is the difference between MAC12HCMG and BT138-600G,127?
A: MAC12HCMG is the direct equivalent with identical specifications. BT138-600G,127 is a functional equivalent from a different manufacturer (NXP) with the same 600V/12A ratings and TO-220-3 package. Both are suitable replacements, with MAC12HCMG offering the closest specification match.
Q: Are there compliance differences between substitute parts?
A: Yes. MAC12HCMG, BTA12-600BW3G, and BTA12-600CW3G are RoHS3 compliant. The original MAC12HCM is RoHS non-compliant. All listed parts are REACH Unaffected. Verify compliance requirements for your application before selection.
Q: Can I use BT138-600G0Q or BT138-600G0TQ instead of MAC12HCMG?
A: Yes, both are functional equivalents with 600V/12A ratings and TO-220-3 packaging. However, they have lower gate trigger voltage (1V vs. 1.5V) and higher gate trigger current (100mA vs. 50mA). Verify gate drive circuit compatibility before substitution.
Q: What does "Snubberless" mean in the BTA08-600BWRG and BTA10-600BWRG descriptions?
A: Snubberless TRIACs (Alternistor technology) have improved EMI characteristics and reduced snubber circuit requirements compared to standard TRIACs. These parts are not direct replacements for the standard MAC12HCM due to current rating differences, but the technology offers design advantages in new applications.
Q: Is the TO-220-3 package the same across all substitute parts?
A: Yes. All listed substitute parts use the TO-220-3 through-hole package, ensuring mechanical and pin compatibility with the original MAC12HCM footprint.
Q: Which substitute part has the highest inventory availability?
A: BT138-600G,127 (NXP USA Inc.) has 4444 pieces in stock, the highest among all listed substitutes.
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