L6006L8 TRIAC Logic - Sensitive Gate 600V 6A TO-220 Equivalent & Substitute Parts

Part Overview

The L6006L8 is a TRIAC Logic - Sensitive Gate thyristor rated for 600 V off-state voltage and 6 A on-state current (RMS), packaged in TO-220-3 Isolated Tab configuration. Manufactured by Littelfuse Inc., this component is discontinued at DiGi Electronics. Equivalent and substitute parts are available from active manufacturers including STMicroelectronics and WeEn Semiconductors, offering compatible or enhanced electrical characteristics within the same package family.

Key Parameters

Parameter	L6006L8
Manufacturer	Littelfuse Inc.
Triac Type	Logic - Sensitive Gate
Voltage - Off State	600 V
Current - On State (It RMS Max)	6 A
Voltage - Gate Trigger (Vgt Max)	1.3 V
Current - Gate Trigger (Igt Max)	10 mA
Current - Hold (Ih Max)	20 mA
Operating Temperature	-40°C ~ 110°C (TJ)
Package / Case	TO-220-3 Isolated Tab
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the L6006L8 is determined by the following critical parameters:

Voltage Rating: 600 V off-state voltage (mandatory match)
Current Rating: 6 A on-state current or higher (equal or greater capacity acceptable)
Triac Type: Logic - Sensitive Gate preferred for gate trigger characteristics; Alternistor - Snubberless acceptable with higher gate trigger current tolerance
Gate Trigger Voltage (Vgt): 1.3 V maximum (critical for gate drive compatibility)
Package: TO-220-3 configuration (mechanical and thermal compatibility)
Operating Temperature: Extended range preferred (-40°C ~ 125°C vs. -40°C ~ 110°C)
Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories: direct Logic - Sensitive Gate equivalents and Alternistor - Snubberless alternatives with compatible electrical parameters.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (It RMS Max)	Voltage - Gate Trigger (Vgt Max)	Current - Gate Trigger (Igt Max)	Current - Hold (Ih Max)	Operating Temperature	Package	Product Status
L6006L8	Littelfuse Inc.	Logic - Sensitive Gate	600 V	6 A	1.3 V	10 mA	20 mA	-40°C ~ 110°C	TO-220-3 Isolated Tab	Discontinued
BT137X-600E,127	WeEn Semiconductors	Logic - Sensitive Gate	600 V	8 A	1.5 V	10 mA	20 mA	-40°C ~ 125°C	TO-220-3 Full Pack, Isolated Tab	Active
BTA06-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	6 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-220-3	Active
BTA06-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active
BTA06-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	35 mA	35 mA	-40°C ~ 125°C	TO-220-3	Active
BTA08-600SWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	10 mA	15 mA	-40°C ~ 125°C	TO-220-3	Active
BTA08-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	8 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	TO-220-3	Active
BTA10-600BRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active
BTA10-600CRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	25 mA	25 mA	-40°C ~ 125°C	TO-220-3	Active
BTA12-600BRG	STMicroelectronics	Standard	600 V	12 A	1.3 V	50 mA	50 mA	-40°C ~ 125°C	TO-220-3	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred for Pin-Compatible Replacement):

BTA06-600TWRG (STMicroelectronics) provides the closest functional match to L6006L8. Both are Logic - Sensitive Gate TRIACs with 600 V rating, 6 A on-state current, and 1.3 V gate trigger voltage. BTA06-600TWRG offers lower gate trigger current (5 mA vs. 10 mA) and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 110°C). Product status is Active with ROHS3 compliance and unlimited moisture sensitivity level.

Higher Current Capacity Alternatives (Logic - Sensitive Gate):

BT137X-600E,127 (WeEn Semiconductors) and BTA08-600SWRG or BTA08-600TWRG (STMicroelectronics) provide 8 A on-state current with Logic - Sensitive Gate characteristics. These are suitable where circuit design permits higher current capacity. All maintain 600 V voltage rating, 1.3 V gate trigger voltage, and TO-220-3 package compatibility. All are Active status with ROHS3 compliance.

Alternistor - Snubberless Options (Gate Drive Tolerance Required):

BTA06-600BWRG and BTA06-600CWRG (STMicroelectronics) maintain 600 V, 6 A ratings with 1.3 V gate trigger voltage but feature higher gate trigger current (50 mA and 35 mA respectively). These are suitable only where gate drive circuits can supply higher trigger current. Both are Active status with ROHS3 compliance and extended temperature range.

Higher Current Standard TRIAC Options (Design Margin):

BTA10-600BRG, BTA10-600CRG, and BTA12-600BRG (STMicroelectronics) provide 10 A and 12 A ratings respectively with 600 V voltage rating and 1.3 V gate trigger voltage. These are Standard-type TRIACs with higher gate trigger current requirements (25 mA to 50 mA). Suitable where circuit design requires additional current margin. All are Active status with ROHS3 compliance and extended temperature range.

Frequently Asked Questions (FAQ)

Q: Can BTA06-600TWRG directly replace L6006L8 without circuit modification?

A: Yes. BTA06-600TWRG is a direct pin-compatible substitute with identical voltage rating (600 V), on-state current (6 A), and gate trigger voltage (1.3 V). The lower gate trigger current (5 mA vs. 10 mA) and extended temperature range are improvements. TO-220-3 package compatibility is confirmed.

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

A: Logic - Sensitive Gate TRIACs (L6006L8, BTA06-600TWRG, BTA08-600SWRG) are optimized for low gate trigger current (5-10 mA) and are suitable for logic-level gate drive circuits. Alternistor - Snubberless types (BTA06-600BWRG, BTA06-600CWRG) require higher gate trigger current (35-50 mA) but offer improved EMI performance. Substitution between types requires gate drive circuit verification.

Q: Can I use an 8 A rated TRIAC in place of the 6 A L6006L8?

A: Yes, if circuit design permits. BT137X-600E,127, BTA08-600SWRG, and BTA08-600TWRG all provide 8 A on-state current with compatible voltage and gate trigger specifications. Higher current capacity provides design margin but does not degrade performance in 6 A applications. Verify thermal management and PCB layout remain adequate.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant. L6006L8 is also ROHS3 compliant. Moisture sensitivity level is 1 (Unlimited) for all parts, indicating no special storage or handling requirements.

Q: What is the operating temperature difference between L6006L8 and substitute parts?

A: L6006L8 operates from -40°C to 110°C (TJ). All substitute parts extend the upper limit to 125°C (TJ), providing 15°C additional thermal margin. This is beneficial for applications with elevated ambient or self-heating conditions.

Q: Which substitute part has the lowest gate trigger current?

A: BTA06-600TWRG and BTA08-600TWRG both feature 5 mA maximum gate trigger current, lower than L6006L8 (10 mA). This reduces gate drive circuit power requirements and is compatible with lower-power logic-level gate drive sources.

Q: Can I substitute a 10 A or 12 A TRIAC for the 6 A L6006L8?

A: Yes, if circuit design permits. BTA10-600BRG, BTA10-600CRG, and BTA12-600BRG provide higher current capacity with identical 600 V voltage rating and 1.3 V gate trigger voltage. However, these are Standard-type TRIACs with higher gate trigger current requirements (25-50 mA). Gate drive circuit verification is required before substitution.

Q: What is the package difference between TO-220-3 Isolated Tab and TO-220-3 Full Pack?

A: Both are TO-220-3 configurations suitable for through-hole mounting. Isolated Tab (L6006L8) provides electrical isolation between the tab and the die. Full Pack (BT137X-600E,127) does not provide isolation. Verify PCB layout and thermal management requirements before substitution, as tab isolation affects grounding and heat dissipation paths.

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