Q6012RH2 TRIAC Alternistor 600V 12A TO-220 Equivalent & Substitute Parts

Part Overview

The Q6012RH2 is a snubberless TRIAC Alternistor rated for 600V off-state voltage and 12A on-state current in a TO-220 through-hole package, manufactured by Littelfuse Inc. This component is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement. Substitute parts must maintain electrical compatibility across voltage, current, and gate trigger specifications while accommodating different TRIAC architectures (Alternistor, Logic-Sensitive Gate, Internally Triggered, or Standard types).

Key Parameters

Parameter	Q6012RH2 Value	Unit
Voltage - Off State	600	V
Current - On State (It RMS) Max	12	A
Voltage - Gate Trigger (Vgt) Max	1.3	V
Current - Gate Trigger (Igt) Max	10	mA
Current - Hold (Ih) Max	15	mA
Current - Non Rep. Surge (50/60Hz)	110A / 120A	A
Operating Temperature Range	-40 to 125	°C
Package / Case	TO-220-3	—
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

Voltage - Off State: 600V minimum (equal or higher acceptable)
Current - On State (It RMS): 12A minimum (equal or higher acceptable)
Package / Case: TO-220-3 (mechanical and thermal compatibility)
Mounting Type: Through Hole (PCB assembly compatibility)

Secondary Compatibility Factors:

Voltage - Gate Trigger (Vgt) Max: 1.3V to 1.5V range acceptable
Current - Gate Trigger (Igt) Max: 5mA to 10mA range acceptable
Current - Hold (Ih) Max: 15mA (consistent across all candidates)
Operating Temperature: -40°C to 125°C minimum (higher maximum acceptable)
RoHS Compliance: ROHS3 or equivalent required

TRIAC Type Variations: Substitute parts include Logic-Sensitive Gate, Internally Triggered, and Standard architectures. These represent different gate sensitivity and triggering characteristics but maintain electrical parameter compatibility within the specified ranges.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State (V)	Current - On State Max (A)	Vgt Max (V)	Igt Max (mA)	Ih Max (mA)	Operating Temp (°C)	Product Status
Q6012RH2	Littelfuse Inc.	600	12	1.3	10	15	-40 to 125	Discontinued
BTA12-600SWRG	STMicroelectronics	600	12	1.3	10	15	-40 to 125	Active
BTB12-600SWRG	STMicroelectronics	600	12	1.3	10	15	-40 to 125	Active
AVS12CB	STMicroelectronics	600	12	—	—	15	0 to 125	Active
BTA216-600D,127	WeEn Semiconductors	600	16	1.5	5	15	—	Active
BTA316-600D,127	WeEn Semiconductors	600	16	1.5	5	15	125	Active
BTA316-600E,127	WeEn Semiconductors	600	16	1.5	10	15	125	Active
BTA316-600ET,127	WeEn Semiconductors	600	16	1.5	10	15	150	Active
BTA316-600ET/DGQ	WeEn Semiconductors	600	16	1.0	10	15	150	Active
T1610H-6T	STMicroelectronics	600	16	1.3	10	15	-40 to 150	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (12A Current Rating):

BTA12-600SWRG and BTB12-600SWRG from STMicroelectronics provide identical electrical specifications to the Q6012RH2 across all critical parameters. Both are active products with ROHS3 compliance and equivalent inventory availability. These represent the closest functional replacements.

Internally Triggered Alternative (12A Current Rating):

AVS12CB from STMicroelectronics maintains the 12A current rating and 600V voltage specification. Operating temperature range is reduced to 0°C to 125°C (versus -40°C to 125°C on the original). This part is suitable for applications not requiring extended low-temperature operation.

Higher Current Capacity Substitutes (16A Current Rating):

BTA216-600D,127, BTA316-600D,127, BTA316-600E,127, BTA316-600ET,127, BTA316-600ET/DGQ, and T1610H-6T all provide 16A on-state current, exceeding the 12A requirement. These parts are electrically compatible and support higher current applications. BTA316-600ET,127 and T1610H-6T offer extended operating temperature ranges to 150°C. All are active products with ROHS3 compliance.

Compliance and Availability:

All substitute parts maintain ROHS3 compliance or equivalent environmental standards. Inventory levels range from 861 to 13,190 units across active suppliers, ensuring procurement availability.

Frequently Asked Questions (FAQ)

Q: Can I use a 16A TRIAC substitute in place of the 12A Q6012RH2?

A: Yes. The 16A parts (BTA216, BTA316, T1610H series) are electrically compatible. Higher current rating provides design margin and does not create incompatibility. Thermal management and PCB layout remain unchanged for equivalent power dissipation at 12A operation.

Q: What is the difference between BTA12-600SWRG and BTB12-600SWRG?

A: Both parts are electrically identical with matching specifications. The difference is in base product designation (BTA12 versus BTB12) and packaging tube designation. Both are STMicroelectronics Logic-Sensitive Gate TRIACs suitable for direct substitution.

Q: Is the AVS12CB (Internally Triggered) compatible with my circuit designed for the Q6012RH2 (Alternistor)?

A: The AVS12CB maintains electrical compatibility across voltage, current, and hold current specifications. The primary difference is gate triggering architecture. Verify gate drive circuit compatibility with the internally triggered design before implementation. Operating temperature range is reduced to 0°C to 125°C.

Q: Why do some substitutes have higher gate trigger voltage (Vgt) specifications?

A: BTA216, BTA316, and related parts specify Vgt Max of 1.5V versus 1.3V on the Q6012RH2. This represents a wider tolerance band and does not affect circuit operation. Gate drive circuits designed for 1.3V will function with 1.5V parts.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All listed substitutes use TO-220-3 through-hole packaging with identical mechanical and thermal characteristics. PCB footprints and heatsink mounting are directly compatible.

Q: What is the difference between BTA316-600E,127 and BTA316-600ET,127?

A: Both are Logic-Sensitive Gate TRIACs with identical electrical specifications. BTA316-600ET,127 supports extended operating temperature to 150°C (versus 125°C). Select BTA316-600ET,127 for high-temperature applications.

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