L6004L3 TRIAC Logic - Sensitive Gate 600V 4A TO-220 Equivalent & Substitute Parts

Part Overview

The L6004L3 is a TRIAC Logic - Sensitive Gate thyristor manufactured by Littelfuse Inc., rated for 600V off-state voltage and 4A on-state current in a TO-220-3 through-hole package. This component is discontinued at DiGi Electronics. Substitute parts are necessary to maintain circuit functionality and ensure continued availability for new designs or replacement applications.

Key Parameters

Parameter	L6004L3 Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	4 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	3 mA
Current - Hold (Ih) (Max)	5 mA
Operating Temperature Range	-40°C ~ 110°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the L6004L3 is determined by the following criteria:

Critical Parameters:

Voltage - Off State: 600V (must match)
Package / Case: TO-220-3 (must match for mechanical compatibility)
Mounting Type: Through Hole (must match)
Configuration: Single (must match)

Functional Parameters:

Current - On State (It (RMS)): Substitute must equal or exceed 4A
Voltage - Gate Trigger (Vgt): Must not exceed 1.3V
Current - Gate Trigger (Igt): Lower values indicate more sensitive gate operation
Current - Hold (Ih): Lower values indicate more sensitive hold characteristics

Substitute parts are grouped by current rating (6A, 8A, 10A, 12A) and TRIAC type (Logic - Sensitive Gate, Alternistor - Snubberless, Standard). All substitutes maintain 600V off-state voltage and TO-220-3 packaging.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (Max)	Voltage - Gate Trigger (Max)	Current - Gate Trigger (Max)	Current - Hold (Max)	Operating Temperature	Product Status
L6004L3	Littelfuse Inc.	Logic - Sensitive Gate	600 V	4 A	1.3 V	3 mA	5 mA	-40°C ~ 110°C	Discontinued
BTA06-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	Active
BTA06-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	Active
BTA06-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	6 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	Active
BTA08-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	8 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	Active
BTA08-600SWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	Active
BTA10-600BRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	Active
BTA10-600CRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	Active
BTA12-600BRG	STMicroelectronics	Standard	600 V	12 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	Active
BTA12-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	12 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	Active
BTA12-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	12 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Direct Functional Replacement (Logic - Sensitive Gate Type): BTA06-600TWRG, BTA08-600SWRG, and BTA12-600TWRG maintain the Logic - Sensitive Gate TRIAC type with gate trigger current specifications of 5mA, matching the low-gate-current sensitivity of the L6004L3. These parts are active products from STMicroelectronics with extended operating temperature range (-40°C ~ 125°C) and ROHS3 compliance.

Higher Current Capacity Substitutes (Alternistor - Snubberless Type): BTA06-600CWRG, BTA08-600CWRG, and BTA12-600CWRG provide increased on-state current ratings (6A, 8A, 12A respectively) with Snubberless technology. Gate trigger current specifications range from 35mA to 50mA, indicating less sensitive gate operation compared to the L6004L3.

Standard TRIAC Type Substitutes: BTA10-600BRG, BTA10-600CRG, and BTA12-600BRG offer Standard TRIAC operation with current ratings of 10A and 12A. Gate trigger current specifications range from 25mA to 50mA.

All substitute parts are active products with ROHS3 compliance and extended operating temperature ranges, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can BTA06-600TWRG directly replace L6004L3 in existing circuits? A: BTA06-600TWRG is a Logic - Sensitive Gate TRIAC with matching gate trigger voltage (1.3V max) and similar gate trigger current (5mA). The 6A on-state current rating exceeds the L6004L3's 4A rating, providing margin. Operating temperature range extends to 125°C versus 110°C for the L6004L3. Direct substitution is electrically compatible.

Q: What is the difference between Logic - Sensitive Gate and Alternistor - Snubberless types? A: Logic - Sensitive Gate TRIACs (L6004L3, BTA06-600TWRG, BTA08-600SWRG, BTA12-600TWRG) feature low gate trigger current (3mA to 5mA), enabling operation with low-power gate drive circuits. Alternistor - Snubberless types (BTA06-600BWRG, BTA06-600CWRG, BTA08-600CWRG, BTA12-600CWRG) require higher gate trigger current (35mA to 50mA) but provide improved EMI performance and reduced snubber network requirements.

Q: Are all substitute parts available in TO-220-3 packaging? A: All listed substitute parts are specified in TO-220-3 through-hole packaging, matching the L6004L3 mechanical form factor and pin configuration.

Q: What is the temperature operating range difference between L6004L3 and STMicroelectronics substitutes? A: The L6004L3 operates from -40°C to 110°C (TJ). All STMicroelectronics substitute parts extend the upper temperature limit to 125°C (TJ), providing 15°C additional thermal margin.

Q: Which substitute part has the closest gate trigger current specification to L6004L3? A: BTA06-600TWRG, BTA08-600SWRG, and BTA12-600TWRG all specify 5mA maximum gate trigger current, matching the L6004L3's 3mA specification within the Logic - Sensitive Gate classification. These parts maintain the lowest gate current requirements among all substitutes.

Q: Can I use a higher current-rated TRIAC as a substitute? A: Yes. BTA08-600SWRG (8A), BTA10-600CRG (10A), and BTA12-600TWRG (12A) all exceed the L6004L3's 4A on-state current rating. Higher current ratings provide design margin and do not compromise circuit function when gate drive and thermal management are appropriately designed.

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