L6006L656 TRIAC Logic - Sensitive Gate 600V 6A TO-220 Equivalent & Substitute Parts

Part Overview

The L6006L656 is a TRIAC Logic - Sensitive Gate thyristor manufactured by Littelfuse Inc., rated for 600V off-state voltage and 6A on-state current in a TO-220-3 Isolated Tab package. This part is discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute TRIACs must maintain electrical compatibility across voltage, current, gate trigger characteristics, and thermal operating ranges.

Key Parameters

Parameter	L6006L656 Value
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)	5 mA
Current - Hold (Ih) (Max)	10 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	50A, 60A
Operating Temperature Range	-40°C ~ 110°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-220-3 Isolated Tab, Formed Leads
Triac Type	Logic - Sensitive Gate
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the L6006L656 is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - Off State: 600V
Current - On State (It (RMS)): 6A maximum
Voltage - Gate Trigger (Vgt): 1.3V maximum
Current - Gate Trigger (Igt): 5 mA maximum (Logic - Sensitive Gate type requirement)
Current - Hold (Ih): 10 mA maximum
Mounting Type: Through Hole
Package: TO-220-3 configuration
RoHS Compliance: ROHS3 Compliant

Acceptable Variation:

Operating Temperature Range: Extended range acceptable (up to 125°C)
Current - Non Rep. Surge (Itsm): Higher values acceptable (60A, 63A)
Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories:

Category 1 - Direct Logic - Sensitive Gate Substitutes (Identical Gate Characteristics): Parts maintaining the Logic - Sensitive Gate type with Igt ≤ 5 mA and Ih ≤ 10 mA.

Category 2 - Alternistor Snubberless Substitutes (Higher Gate Current Tolerance): Parts with Alternistor - Snubberless type and higher gate trigger current (Igt ≤ 50 mA, Ih ≤ 50 mA) for applications where gate sensitivity is less critical.

Parameter Comparison

Part Number	Manufacturer	Triac Type	Voltage - Off State	Current - On State (It)	Vgt (Max)	Igt (Max)	Ih (Max)	Itsm (50/60Hz)	Operating Temp	Package	Product Status
L6006L656	Littelfuse Inc.	Logic - Sensitive Gate	600 V	6 A	1.3 V	5 mA	10 mA	50A, 60A	-40°C ~ 110°C	TO-220-3 Isolated Tab	Discontinued
BTA06-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	6 A	1.3 V	5 mA	10 mA	60A, 63A	-40°C ~ 125°C	TO-220-3	Active
BTA06-600BWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	50 mA	50 mA	60A, 63A	-40°C ~ 125°C	TO-220-3	Active
BTA06-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	6 A	1.3 V	35 mA	35 mA	60A, 63A	-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	80A, 84A	-40°C ~ 125°C	TO-220-3	Active
BTA08-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	8 A	1.3 V	35 mA	35 mA	80A, 84A	-40°C ~ 125°C	TO-220-3	Active
BTA10-600CRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	25 mA	25 mA	100A, 105A	-40°C ~ 125°C	TO-220-3	Active
BTA10-600BRG	STMicroelectronics	Standard	600 V	10 A	1.3 V	50 mA	50 mA	100A, 105A	-40°C ~ 125°C	TO-220-3	Active
BTA12-600TWRG	STMicroelectronics	Logic - Sensitive Gate	600 V	12 A	1.3 V	5 mA	10 mA	120A, 126A	-40°C ~ 125°C	TO-220-3	Active
BTA12-600CWRG	STMicroelectronics	Alternistor - Snubberless	600 V	12 A	1.3 V	35 mA	35 mA	120A, 126A	-40°C ~ 125°C	TO-220-3	Active
BTA12-600BRG	STMicroelectronics	Standard	600 V	12 A	1.3 V	50 mA	50 mA	120A, 126A	-40°C ~ 125°C	TO-220-3	Active

Engineering Selection Recommendations

Primary Substitute - Direct Replacement: BTA06-600TWRG is the optimal substitute for L6006L656. Both parts are Logic - Sensitive Gate type with identical gate trigger specifications (Igt 5 mA, Ih 10 mA). The BTA06-600TWRG maintains all critical electrical parameters, offers extended operating temperature range (-40°C to 125°C), and is in active production status with high inventory availability (2058 pcs). Both parts are ROHS3 compliant.

Secondary Substitutes - Same Current Rating (6A): BTA06-600BWRG and BTA06-600CWRG are Alternistor - Snubberless variants with 600V, 6A ratings. These parts have higher gate trigger current requirements (50 mA and 35 mA respectively) compared to the L6006L656 (5 mA). These substitutes are suitable for applications where gate sensitivity is not a limiting design factor. Both are active, ROHS3 compliant, and available in high quantities.

Higher Current Alternatives: BTA08-600SWRG (8A Logic - Sensitive Gate), BTA10-600CRG (10A Standard), and BTA12-600TWRG (12A Logic - Sensitive Gate) provide increased current capacity while maintaining 600V voltage rating and TO-220-3 packaging. These are suitable only for designs where the higher current rating does not create thermal or circuit design conflicts. All are active and ROHS3 compliant.

Compliance Status: All recommended substitutes maintain ROHS3 compliance and are manufactured by STMicroelectronics, an established semiconductor supplier with consistent product availability and quality standards.

Frequently Asked Questions (FAQ)

Q: Can BTA06-600BWRG or BTA06-600CWRG directly replace L6006L656? A: Both parts meet the 600V, 6A electrical requirements and TO-220-3 package specification. However, they are Alternistor - Snubberless type with higher gate trigger current (50 mA and 35 mA respectively) versus the L6006L656 Logic - Sensitive Gate type (5 mA). Direct substitution is possible only if the circuit design does not depend on low gate trigger current sensitivity. BTA06-600TWRG is the preferred substitute for gate-sensitive applications.

Q: Why is BTA06-600TWRG recommended over BTA06-600BWRG? A: BTA06-600TWRG is a Logic - Sensitive Gate type matching the L6006L656 gate characteristics exactly (Igt 5 mA, Ih 10 mA). BTA06-600BWRG is Alternistor - Snubberless type with significantly higher gate trigger current (50 mA). For circuits designed around the L6006L656 gate sensitivity, BTA06-600TWRG ensures functional equivalence without circuit redesign.

Q: Can higher current rated parts (8A, 10A, 12A) substitute for the 6A L6006L656? A: Higher current rated TRIACs maintain the 600V voltage rating and TO-220-3 package compatibility. However, substitution requires circuit analysis to confirm that increased current capacity does not introduce thermal management issues or alter circuit behavior. These parts are suitable only for designs with current headroom or where increased surge current capability is beneficial.

Q: What is the difference between Logic - Sensitive Gate and Alternistor - Snubberless types? A: Logic - Sensitive Gate TRIACs have low gate trigger current requirements (typically 5-10 mA), suitable for low-power gate drive circuits. Alternistor - Snubberless TRIACs have higher gate trigger current requirements (35-50 mA) and are optimized for snubberless operation in AC switching applications. Selection depends on gate drive circuit design and application requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The L6006L656 and all listed substitute parts are ROHS3 compliant, meeting environmental and hazardous substance restrictions for electronic components.

Q: What is the package difference between TO-220-3 Isolated Tab and standard TO-220-3? A: The L6006L656 specifies TO-220-3 Isolated Tab with formed leads. STMicroelectronics substitute parts specify standard TO-220-3 packaging. Both are through-hole TO-220 variants with three leads. Physical mounting compatibility is maintained, though lead forming specifications may differ. Verify mechanical fit in target PCB design.

Q: Is inventory availability a factor in substitute selection? A: Yes. BTA06-600CWRG has the highest inventory (18654 pcs), followed by BTA08-600SWRG (26100 pcs) and BTA12-600TWRG (27550 pcs). BTA06-600TWRG, the recommended primary substitute, has 2058 pcs available. Inventory levels support long-term production continuity for all listed substitutes.

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