Q6006RH3 Equivalent & Substitute Parts

Part Overview

The Q6006RH3 is a Littelfuse Inc. Alternistor-type TRIAC rated for 600 V off-state voltage and 6 A on-state current in a TO-220AB through-hole package. This snubberless design is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing production and maintenance applications. Substitute TRIACs in this voltage class maintain the same 600 V rating while offering higher current ratings, standard TRIAC configurations, or enhanced gate sensitivity characteristics.

Key Parameters

Parameter	Q6006RH3 Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	6 A
Triac Type	Alternistor - Snubberless
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA
Current - Hold (Ih) (Max)	15 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q6006RH3 is determined by the following criteria:

Mandatory Parameters for Substitution:

Voltage - Off State: 600 V (exact match required)
Package / Case: TO-220-3 (mechanical compatibility)
Mounting Type: Through Hole (assembly compatibility)

Current Rating Consideration: Substitute parts are grouped by on-state current rating. The Q6006RH3 operates at 6 A maximum. Substitutes with equal or higher current ratings (8 A, 12 A, 16 A) are electrically compatible in applications where the original 6 A rating is sufficient, as higher-rated devices operate within the same voltage envelope and package footprint.

Gate Trigger Characteristics: The Q6006RH3 features low gate trigger voltage (1.3 V max) and low gate trigger current (10 mA max), characteristic of Alternistor-type or Logic-Sensitive Gate TRIACs. Standard TRIAC substitutes with higher gate trigger specifications (2 V, 50 mA) require circuit evaluation for gate drive compatibility. Logic-Sensitive Gate alternatives (BTA16-600SW3G) maintain the low gate trigger profile.

Triac Type Transition: The original Alternistor-Snubberless design transitions to Standard or Logic-Sensitive Gate configurations in available substitutes. This change does not affect 600 V voltage class operation but may alter snubber network requirements in the application circuit.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Current - On State (Max)	Triac Type	Vgt (Max)	Igt (Max)	Ih (Max)	Package	Product Status
Q6006RH3	Littelfuse Inc.	600 V	6 A	Alternistor - Snubberless	1.3 V	10 mA	15 mA	TO-220-3	Discontinued
2N6344AG	Littelfuse Inc.	600 V	12 A	Standard	2 V	50 mA	40 mA	TO-220-3	Active
2N6344G	Littelfuse	600 V	8 A	Standard	2 V	50 mA	40 mA	TO-220-3	Active
2N6348AG	onsemi	600 V	12 A	Standard	2 V	50 mA	40 mA	TO-220-3	Active
BTA08-600BW3G	onsemi	600 V	8 A	Standard	1.1 V	50 mA	60 mA	TO-220-3	Active
BTA08-600CW3G	Littelfuse Inc.	600 V	8 A	Standard	1.1 V	35 mA	35 mA	TO-220-3	Active
BTA12-600BW3G	onsemi	600 V	12 A	Standard	1.1 V	50 mA	50 mA	TO-220-3	Active
BTA12-600CW3G	Littelfuse Inc.	600 V	12 A	Standard	1.1 V	35 mA	45 mA	TO-220-3	Active
BTA16-600BW3G	onsemi	600 V	16 A	Standard	1.1 V	50 mA	60 mA	TO-220-3	Active
BTA16-600CW3G	onsemi	600 V	16 A	Standard	1.1 V	35 mA	50 mA	TO-220-3	Active
BTA16-600SW3G	onsemi	600 V	16 A	Logic - Sensitive Gate	1.3 V	10 mA	20 mA	TO-220-3	Active

Engineering Selection Recommendations

Direct Substitution (Lowest Circuit Impact): BTA16-600SW3G is the closest functional equivalent. It maintains the 600 V voltage rating, TO-220-3 package, and critical gate trigger parameters (Vgt 1.3 V max, Igt 10 mA max) that match the Q6006RH3 Alternistor profile. The Logic-Sensitive Gate configuration preserves low-gate-drive circuit compatibility. Higher current rating (16 A) provides design margin without affecting voltage class operation.

Current-Matched Substitutes (8 A Rating): BTA08-600CW3G (Littelfuse Inc.) and BTA08-600BW3G (onsemi) provide 8 A on-state current, closest to the original 6 A rating. Both maintain 600 V voltage class and TO-220-3 package. Gate trigger voltage is lower (1.1 V max) than the original, reducing gate drive requirements. These are suitable for applications where current margin above 6 A is acceptable.

Higher Current Capacity (12 A and 16 A Ratings): 2N6344AG, 2N6344G, 2N6348AG, BTA12-600BW3G, and BTA12-600CW3G provide 12 A ratings. BTA16-600BW3G and BTA16-600CW3G provide 16 A ratings. All maintain 600 V voltage class and TO-220-3 package. Standard TRIAC configuration requires gate drive circuit evaluation due to higher gate trigger specifications (Vgt 2 V or 1.1 V, Igt 35-50 mA). These are suitable for applications requiring higher current capacity within the same voltage envelope.

Compliance and Availability: All substitute parts are ROHS3 compliant and active in production. Littelfuse Inc. and onsemi manufacturers ensure supply continuity and technical support.

Frequently Asked Questions (FAQ)

Q: Can I use a higher current-rated TRIAC as a direct replacement for the Q6006RH3? A: Yes, within the same voltage class. A TRIAC rated for 8 A, 12 A, or 16 A at 600 V operates safely in circuits designed for 6 A operation. The higher current rating provides design margin and does not affect voltage class performance. Package and mounting type must remain TO-220-3 through-hole.

Q: What is the difference between Alternistor-Snubberless and Standard TRIAC types? A: The Q6006RH3 Alternistor-Snubberless type is optimized for reduced snubber network requirements in the application circuit. Standard TRIAC substitutes may require snubber evaluation depending on load characteristics. Logic-Sensitive Gate types (BTA16-600SW3G) maintain low gate trigger specifications similar to the original Alternistor design.

Q: Does gate trigger voltage affect substitution compatibility? A: Gate trigger voltage (Vgt) and current (Igt) determine gate drive circuit requirements. The Q6006RH3 specifies Vgt 1.3 V max and Igt 10 mA max. Substitutes with lower Vgt (1.1 V) reduce gate drive requirements. Substitutes with higher Vgt (2 V) and Igt (50 mA) require circuit evaluation to ensure adequate gate drive capability. BTA16-600SW3G maintains the original gate trigger profile.

Q: Are all substitute parts available in the same packaging options? A: All listed substitutes are available in TO-220-3 through-hole package. Packaging variants (Box, Tube, Bulk) differ by supplier and do not affect electrical performance or mechanical compatibility.

Q: What is the operating temperature range for substitute parts? A: All substitute parts operate across -40°C to 125°C junction temperature, matching the Q6006RH3 specification. BTA16-600SW3G operates to -40°C to 110°C, which is within typical industrial requirements.

Q: Can I mix different substitute part numbers in the same circuit board? A: Yes, provided all parts maintain the same voltage class (600 V), package (TO-220-3), and mounting type (through-hole). Verify gate drive circuit compatibility if mixing parts with different gate trigger specifications.

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