Q6008LT TRIAC Equivalent & Substitute Parts

Part Overview

The Q6008LT is an internally triggered TRIAC manufactured by Littelfuse Inc., rated for 600 V off-state voltage and 8 A on-state current in a TO-220-3 isolated tab package. This component is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement. The part operates across the industrial temperature range of -40°C to 125°C and maintains ROHS3 compliance.

Key Parameters

Parameter	Q6008LT Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	8 A
Current - Non Rep. Surge 50, 60Hz (Itsm)	83 A, 100 A
Current - Hold (Ih) (Max)	60 mA
Triac Type	Internally Triggered
Operating Temperature	-40°C to 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab
Configuration	Single
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the Q6008LT is determined by the following critical parameters:

Voltage Rating: Off-state voltage must be 600 V or higher
Current Rating: On-state current (It (RMS)) must be 8 A or higher to maintain or exceed the original specification
Package Type: TO-220-3 through-hole mounting required for mechanical compatibility
Operating Temperature Range: -40°C to 125°C minimum
Configuration: Single TRIAC configuration
Compliance: ROHS3 compliance required

Substitute parts are grouped by current rating capability. Parts rated at 8 A or above with 600 V off-state voltage are direct substitutes. Parts rated below 8 A (6 A variants) are downgrades and function only in applications with reduced current requirements. Parts rated above 8 A (10 A, 12 A variants) are upgrades suitable for higher current applications.

Parameter Comparison

Parameter	Q6008LT	BTA06-600BWRG	BTA06-600CWRG	BTA06-600TWRG	BTA08-600CWRG	BTA08-600SWRG	BTA10-600BRG	BTA10-600CRG	BTA12-600BRG	BTA12-600CWRG	BTA12-600TWRG
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	8 A	6 A	6 A	6 A	8 A	8 A	10 A	10 A	12 A	12 A	12 A
Current - Non Rep. Surge 50, 60Hz (Itsm)	83 A, 100 A	60 A, 63 A	60 A, 63 A	60 A, 63 A	80 A, 84 A	80 A, 84 A	100 A, 105 A	100 A, 105 A	120 A, 126 A	120 A, 126 A	120 A, 126 A
Current - Hold (Ih) (Max)	60 mA	50 mA	35 mA	10 mA	35 mA	15 mA	50 mA	25 mA	50 mA	35 mA	10 mA
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-220-3 Isolated Tab	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Direct Equivalents (8 A Rating)

BTA08-600CWRG and BTA08-600SWRG are the primary substitutes for Q6008LT. Both maintain the 8 A on-state current rating and 600 V off-state voltage. BTA08-600CWRG is an Alternistor - Snubberless type with 35 mA gate trigger current and 35 mA hold current. BTA08-600SWRG is a Logic - Sensitive Gate type with 10 mA gate trigger current and 15 mA hold current. Both are manufactured by STMicroelectronics, carry active product status, and maintain ROHS3 compliance with extensive inventory availability (16,750 and 26,100 units respectively).

Downgrade Options (6 A Rating)

BTA06-600BWRG, BTA06-600CWRG, and BTA06-600TWRG are suitable only for applications where the load current does not exceed 6 A. These parts reduce on-state current capacity by 25% relative to the Q6008LT. BTA06-600BWRG and BTA06-600CWRG are Alternistor - Snubberless types. BTA06-600TWRG is a Logic - Sensitive Gate type with the lowest gate trigger current (5 mA). All three maintain 600 V off-state voltage and active product status.

Upgrade Options (10 A and 12 A Ratings)

BTA10-600BRG, BTA10-600CRG, BTA12-600BRG, BTA12-600CWRG, and BTA12-600TWRG provide increased current capacity for applications requiring higher load currents. BTA10 variants are rated at 10 A; BTA12 variants at 12 A. All maintain 600 V off-state voltage, TO-220-3 package compatibility, and active product status with ROHS3 compliance. BTA12-600BRG offers the highest inventory availability at 212,600 units.

Frequently Asked Questions (FAQ)

Q: Can BTA06 series parts replace Q6008LT in all applications?

A: No. BTA06 series parts are rated at 6 A maximum on-state current, which is 25% lower than the Q6008LT's 8 A rating. They are suitable only for applications where the actual load current does not exceed 6 A. Exceeding this rating will cause thermal stress and potential device failure.

Q: What is the difference between Alternistor - Snubberless and Logic - Sensitive Gate types?

A: Alternistor - Snubberless types (BTA06-600BWRG, BTA06-600CWRG, BTA08-600CWRG, BTA12-600CWRG) have higher gate trigger current requirements (35-50 mA). Logic - Sensitive Gate types (BTA06-600TWRG, BTA08-600SWRG, BTA12-600TWRG) have lower gate trigger current requirements (5-10 mA), making them suitable for low-power gate drive circuits. Selection depends on the available gate drive capability in the application.

Q: Are BTA10 and BTA12 series parts pin-compatible with Q6008LT?

A: Yes. All substitute parts listed use the TO-220-3 package with identical pin configuration and mechanical footprint. Direct board-level substitution is possible without PCB modification.

Q: Does the Q6008LT's isolated tab affect substitution?

A: The Q6008LT uses a TO-220-3 Isolated Tab package variant. Standard TO-220-3 packages (used by all BTA series substitutes) have a standard tab. If thermal isolation is required in the application, verify that the standard tab configuration meets thermal and isolation requirements before substitution.

Q: What inventory considerations apply to these substitutes?

A: All listed substitute parts carry active product status with substantial inventory availability. BTA12-600BRG has the highest stock level at 212,600 units. BTA08-600SWRG and BTA12-600TWRG also maintain high availability above 26,000 units. Downgrade options (BTA06 series) have lower availability, ranging from 1,367 to 2,058 units.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the Q6008LT's regulatory status. REACH compliance information is available for all STMicroelectronics BTA series parts listed.

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