MAC212A8G TRIAC 600V 12A Equivalent & Substitute Parts

Part Overview

The MAC212A8G is a standard TRIAC thyristor rated for 600V off-state voltage and 12A on-state current, manufactured by Littelfuse Inc. in TO-220AB through-hole packaging. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, lead time considerations, or specific performance characteristics such as gate trigger voltage optimization or snubberless operation.

Key Parameters

Parameter	MAC212A8G
Manufacturer	Littelfuse Inc.
Category	Thyristors
TRIAC Type	Standard
Voltage - Off State	600 V
Current - On State (It RMS Max)	12 A
Voltage - Gate Trigger (Vgt Max)	2 V
Current - Gate Trigger (Igt Max)	50 mA
Current - Hold (Ih Max)	50 mA
Current - Non Rep. Surge (Itsm)	100A @ 60Hz
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3
Supplier Device Package	TO-220AB
Configuration	Single
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Voltage - Off State: Must equal 600V
Current - On State (It RMS Max): Must equal or exceed 12A
Mounting Type: Must be Through Hole
Package / Case: Must be TO-220-3 or TO-220-3 Isolated Tab
Configuration: Must be Single
Operating Temperature Range: Must encompass the application requirement
Gate Trigger Voltage (Vgt): Lower values indicate improved gate sensitivity
TRIAC Type: Standard, Alternistor - Snubberless, or Internally Triggered variants are functionally compatible

Substitute parts are grouped into three categories based on TRIAC type and current rating:

Group 1: 12A Rating (Direct Current Match)

Q6012LH5TP (Littelfuse Alternistor - Snubberless)
AVS12CB (STMicroelectronics Internally Triggered)
BTA212-600B/DG,127 (NXP Standard)
BTA312-600B,127 (WeEn Semiconductors Standard)

Group 2: 10A Rating (Reduced Current Capacity)

BTA10-600BRG (STMicroelectronics Standard)
BTA10-600BWRG (STMicroelectronics Alternistor - Snubberless)

Group 3: 8A Rating (Reduced Current Capacity)

BTA08-600BRG (STMicroelectronics Standard)
BTA08-600BWRG (STMicroelectronics Alternistor - Snubberless)
BTB08-600BRG (STMicroelectronics Standard)
BTB08-600BWRG (STMicroelectronics Alternistor - Snubberless)

Parameter Comparison

Part Number	Manufacturer	TRIAC Type	Voltage - Off State	Current - On State (It RMS Max)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Itsm (60Hz)	Operating Temp	Package	RoHS Status
MAC212A8G	Littelfuse Inc.	Standard	600 V	12 A	2	50	50	100A	-40°C ~ 125°C	TO-220AB	ROHS3
Q6012LH5TP	Littelfuse Inc.	Alternistor - Snubberless	600 V	12 A	1.3	50	50	110A, 120A	-40°C ~ 125°C	TO-220 Isolated Tab	ROHS3
AVS12CB	STMicroelectronics	Internally Triggered	600 V	12 A	Not specified	Not specified	Not specified	100A, 105A	0°C ~ 125°C	TO-220	ROHS3
BTA212-600B/DG,127	NXP USA Inc.	Standard	600 V	12 A	1.5	50	60	95A, 105A	0°C ~ 125°C	TO-220AB	Not specified
BTA312-600B,127	WeEn Semiconductors	Standard	600 V	12 A	1.5	50	60	95A, 105A	0°C ~ 125°C	TO-220AB	ROHS3
BTA10-600BRG	STMicroelectronics	Standard	600 V	10 A	1.3	50	50	100A, 105A	-40°C ~ 125°C	TO-220	ROHS3
BTA10-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	10 A	1.3	50	50	100A, 105A	-40°C ~ 125°C	TO-220	ROHS3
BTA08-600BRG	STMicroelectronics	Standard	600 V	8 A	1.3	50	50	80A, 84A	-40°C ~ 125°C	TO-220	ROHS3
BTA08-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	8 A	1.3	50	50	80A, 84A	-40°C ~ 125°C	TO-220	ROHS3
BTB08-600BRG	STMicroelectronics	Standard	600 V	8 A	1.3	50	50	80A, 84A	-40°C ~ 125°C	TO-220	ROHS3
BTB08-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	8 A	1.3	50	50	80A, 84A	-40°C ~ 125°C	TO-220	ROHS3

Engineering Selection Recommendations

Direct Equivalents (12A Current Rating)

Q6012LH5TP, BTA212-600B/DG,127, and BTA312-600B,127 are direct current equivalents to MAC212A8G. All three maintain 600V off-state voltage and 12A on-state current specifications. Q6012LH5TP offers reduced gate trigger voltage (1.3V vs 2V) and higher surge current capability (110A-120A vs 100A), making it suitable for applications requiring improved gate sensitivity. BTA212-600B/DG,127 and BTA312-600B,127 are functionally equivalent with slightly lower gate trigger voltage (1.5V) and comparable surge ratings. All three are ROHS3 compliant and Active product status.

AVS12CB (STMicroelectronics Internally Triggered) maintains 12A current and 600V voltage ratings but operates within a narrower temperature range (0°C to 125°C vs -40°C to 125°C). This part is suitable for applications not requiring extended low-temperature operation.

Reduced Current Alternatives (10A and 8A Ratings)

BTA10-600BRG and BTA10-600BWRG provide 10A on-state current, representing an 83% capacity retention relative to MAC212A8G. These parts are suitable for applications where load current does not exceed 10A. BTA10-600BWRG (Alternistor - Snubberless variant) offers improved EMI performance through reduced gate trigger voltage (1.3V).

BTA08-600BRG, BTA08-600BWRG, BTB08-600BRG, and BTB08-600BWRG provide 8A on-state current, representing a 67% capacity retention. These parts are applicable only to applications with maximum load current of 8A or less. All 8A variants feature gate trigger voltage of 1.3V and are ROHS3 compliant.

All substitute parts listed maintain TO-220 through-hole mounting and single configuration, ensuring mechanical compatibility with MAC212A8G footprints.

Frequently Asked Questions (FAQ)

Q: Can Q6012LH5TP replace MAC212A8G in all applications?

A: Q6012LH5TP is a direct current equivalent with identical 600V and 12A ratings. The primary difference is TRIAC type (Alternistor - Snubberless vs Standard) and gate trigger voltage (1.3V vs 2V). Applications requiring standard TRIAC characteristics should verify compatibility with snubberless operation. The isolated tab variant of Q6012LH5TP may require PCB layout adjustment compared to MAC212A8G's standard TO-220AB package.

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

A: Alternistor - Snubberless TRIACs are optimized for reduced EMI and improved gate sensitivity through lower gate trigger voltage. Standard TRIACs provide conventional thyristor operation. Both types are functionally compatible in TO-220 packages at equivalent voltage and current ratings. Application-specific EMI requirements determine which type is appropriate.

Q: Can I use BTA10-600BRG or BTA08-600BRG as substitutes?

A: BTA10-600BRG and BTA08-600BRG are substitutes only for applications where load current does not exceed 10A and 8A respectively. These parts maintain 600V voltage rating and TO-220 through-hole mounting. Current derating must be verified against application load requirements. Use of reduced-current parts in applications exceeding their rated current will result in thermal stress and component failure.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts except BTA212-600B/DG,127 are explicitly ROHS3 compliant. BTA212-600B/DG,127 RoHS status is not specified in available data. Compliance verification with NXP documentation is required for applications with mandatory ROHS3 requirements.

Q: What is the impact of operating temperature range differences?

A: MAC212A8G operates from -40°C to 125°C. AVS12CB operates from 0°C to 125°C, representing a 40°C reduction in low-temperature capability. BTA212-600B/DG,127 also operates from 0°C to 125°C. All other substitutes maintain the full -40°C to 125°C range. Applications requiring operation below 0°C must use parts with extended low-temperature ratings.

Q: How does gate trigger voltage affect circuit design?

A: Gate trigger voltage (Vgt) determines the minimum gate voltage required to initiate TRIAC conduction. MAC212A8G specifies 2V maximum, while most substitutes specify 1.3V to 1.5V. Lower gate trigger voltage improves gate sensitivity and reduces gate drive circuit complexity. Applications with marginal gate drive circuits benefit from lower Vgt specifications. Existing gate drive circuits designed for 2V operation remain compatible with lower Vgt parts.

Q: Can I interchange TO-220AB and TO-220 packages?

A: TO-220AB and TO-220 packages are mechanically similar but differ in tab isolation. TO-220AB features an isolated tab suitable for direct mounting to heatsinks without electrical isolation. Standard TO-220 packages may require isolation considerations. PCB footprint compatibility should be verified before substitution. Q6012LH5TP features an isolated tab variant (TO-220 Isolated Tab), ensuring compatibility with MAC212A8G mounting requirements.

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