MAC97A8 TRIAC Equivalent & Substitute Parts

Part Overview

The MAC97A8 is a Logic-Sensitive Gate TRIAC manufactured by onsemi, rated for 600V off-state voltage and 600mA on-state current in a TO-92 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The MAC97A8 serves in applications requiring low gate-trigger current thyristor switching, commonly found in AC power control circuits, light dimmers, and motor speed controllers. Substitution is required due to product discontinuation while maintaining electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	MAC97A8 Value
Voltage - Off State	600 V
Current - On State (It RMS) Max	600 mA
Voltage - Gate Trigger (Vgt) Max	2 V
Current - Gate Trigger (Igt) Max	5 mA
Current - Hold (Ih) Max	10 mA
Current - Non Rep. Surge (Itsm)	8A @ 60Hz
Operating Temperature Range	-40°C to 110°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3
Triac Type	Logic - Sensitive Gate

Substitute Part Grouping Explanation

Substitution for the MAC97A8 is determined by the following critical parameters:

Voltage Rating: All substitutes must maintain 600V off-state voltage to ensure circuit protection and reliability
Current Rating: On-state current (It RMS) must equal or exceed 600mA to handle design load requirements
Gate Characteristics: Gate trigger voltage (Vgt) and gate trigger current (Igt) determine circuit compatibility; substitutes with lower Vgt values provide improved gate sensitivity
Hold Current (Ih): Must not exceed 10mA to maintain circuit stability
Package Type: TO-92 or TO-92-3 through-hole configuration required for PCB compatibility
Triac Type: Logic-Sensitive Gate classification ensures proper gate control behavior

Substitutes are grouped into three categories:

Direct Equivalent (Same Current Rating): MAC97A8,116 maintains identical 600mA current rating with improved temperature range and active product status.

Upgrade Substitutes (Higher Current Rating): LX807ME, Z00607MA 1BA2, and SST130U-600D provide 800mA current capacity, offering design margin while maintaining 600V voltage rating and TO-92 packaging.

Extended Capability Substitutes (1A Rating): L601E5, Z0103MA variants, and Z0107MA 1AA2 provide 1A current capacity for applications requiring higher current handling with maintained 600V voltage rating.

Parameter Comparison

Part Number	Manufacturer	Voltage (V)	Current (mA)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Itsm (A)	Temp Range (°C)	Package	Status
MAC97A8	onsemi	600	600	2	5	10	8 @ 60Hz	-40 to 110	TO-92	Obsolete
MAC97A8,116	NXP USA Inc.	600	600	2	5	10	8, 8.8	-40 to 125	TO-92-3	Active
LX807ME	Littelfuse Inc.	600	800	1.3	5	5	8, 9.5	-40 to 110	TO-92	Active
BTA2008-600D,412	WeEn Semiconductors	600	800	2	5	10	9, 10	-40 to 125	TO-92-3	Active
L601E5	Littelfuse Inc.	600	1000	1.3	5	10	16.7, 20	-65 to 125	TO-92	Active
SST130U-600D	SMC Diode Solutions	600	800	1.3	10	7	400 @ 50Hz	-40 to 125	TO-92	Active
Z00607MA 1BA2	STMicroelectronics	600	800	1.3	5	5	9, 9.5	-40 to 110	TO-92-3	Active
Z0103MA 1AA2	STMicroelectronics	600	1000	1.3	3	7	8, 8.5	-40 to 125	TO-92-3	Active
Z0103MA,126	WeEn Semiconductors	600	1000	1	5	7	8, 8.5	-40 to 125	TO-92-3	Active
Z0103MA,412	NXP USA Inc.	600	1000	1.3	3	7	8, 8.5	-40 to 125	TO-92-3	Active
Z0107MA 1AA2	STMicroelectronics	600	1000	1.3	5	10	8, 8.5	-40 to 125	TO-92-3	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications)

MAC97A8,116 from NXP USA Inc. provides the closest functional equivalent with identical 600V/600mA ratings and matching gate characteristics. This part is active in production with extended temperature range to 125°C, offering improved reliability over the obsolete MAC97A8. RoHS compliance status should be verified against your design requirements.

For Current-Margin Applications (800mA Rating)

LX807ME (Littelfuse), BTA2008-600D,412 (WeEn Semiconductors), and Z00607MA 1BA2 (STMicroelectronics) provide 800mA current capacity while maintaining 600V voltage rating. These parts offer design margin for load variations. LX807ME and Z00607MA 1BA2 maintain the original -40°C to 110°C temperature range, while BTA2008-600D,412 extends to 125°C. All three are RoHS compliant and active in production.

For High-Current Applications (1A Rating)

L601E5, Z0103MA variants, and Z0107MA 1AA2 provide 1A current capacity suitable for applications requiring higher current handling. L601E5 from Littelfuse offers the widest temperature range (-65°C to 125°C). Z0103MA and Z0107MA variants from STMicroelectronics and NXP provide 1A capacity with 125°C maximum temperature rating. All are RoHS compliant and active in production.

Compliance Considerations

All recommended substitutes are RoHS compliant except SST130U-600D, which carries REACH Affected status. Verify compliance requirements against your design specifications and regional regulations before final selection.

Frequently Asked Questions (FAQ)

Q: Can MAC97A8 be replaced with a higher current-rated TRIAC?

A: Yes. Substitutes with 800mA or 1A ratings maintain 600V voltage compatibility and TO-92 packaging. Higher current ratings provide design margin without affecting circuit operation, provided gate control characteristics remain within acceptable ranges.

Q: What is the difference between Logic-Sensitive Gate and Standard TRIAC types?

A: Logic-Sensitive Gate TRIACs require lower gate trigger current (typically 3-5mA) compared to Standard types (10mA or higher). The MAC97A8 is Logic-Sensitive Gate type; SST130U-600D is Standard type. Substitution between these types requires circuit verification to ensure gate drive capability.

Q: Are TO-92 and TO-92-3 packages interchangeable?

A: Both TO-92 and TO-92-3 are through-hole packages with identical pin configurations and PCB footprints. The primary difference is lead forming; TO-92-3 has formed leads for improved mechanical stability. Both are mechanically and electrically compatible for PCB mounting.

Q: How does gate trigger voltage (Vgt) affect circuit design?

A: Lower Vgt values (1.3V vs 2V) reduce gate drive circuit complexity and power consumption. Substitutes with Vgt of 1.3V require less gate current to trigger the TRIAC. Verify your gate drive circuit can supply the specified Igt (gate trigger current) at the substitute part's Vgt rating.

Q: What is the significance of hold current (Ih)?

A: Hold current is the minimum current required to maintain TRIAC conduction after gate signal removal. The MAC97A8 specifies 10mA maximum. Substitutes with lower Ih (5-7mA) may turn off more readily when gate signal is removed, affecting circuit timing in some applications.

Q: Should I select a substitute based on product status alone?

A: No. While active product status ensures long-term availability, electrical parameters must match or exceed design requirements. Verify voltage rating, current capacity, gate characteristics, and temperature range against your circuit specifications before selection.

Q: Are there RoHS compliance differences among substitutes?

A: Most substitutes are RoHS3 compliant. SST130U-600D is RoHS compliant but carries REACH Affected status. Verify compliance certifications against your regional requirements and customer specifications.

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