L6008R8 TRIAC Equivalent & Substitute Parts

Part Overview

The L6008R8 is a Logic - Sensitive Gate TRIAC rated for 600 V off-state voltage and 8 A on-state current, manufactured by Littelfuse Inc. in a Through Hole TO-220-3 package. This part is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design requirements and production continuity. Substitute parts must maintain compatibility across voltage rating, current capacity, gate trigger characteristics, and thermal operating range to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	L6008R8 Value
Voltage - Off State	600 V
Current - On State (It (RMS)) (Max)	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	10 mA
Current - Hold (Ih) (Max)	20 mA
Operating Temperature Range	-40°C ~ 110°C (TJ)
Package / Case	TO-220-3
Mounting Type	Through Hole
TRIAC Type	Logic - Sensitive Gate

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Compatibility Parameters:

Voltage - Off State: Must equal 600 V
Current - On State (It (RMS)) (Max): Must be ≥ 8 A
Package / Case: Must be TO-220-3
Mounting Type: Must be Through Hole
Gate Trigger Voltage (Vgt) (Max): Must be ≤ 1.3 V for Logic - Sensitive Gate types

Secondary Compatibility Parameters:

Current - Gate Trigger (Igt) (Max): Must be ≤ 10 mA for Logic - Sensitive Gate types
Current - Hold (Ih) (Max): Must be ≤ 20 mA for Logic - Sensitive Gate types
Operating Temperature: Must support minimum -40°C to 110°C range

Substitute Categories:

Group 1: Direct Logic - Sensitive Gate Substitutes (Preferred) Parts maintaining identical TRIAC type classification with matching or superior electrical characteristics.

Group 2: Alternative TRIAC Type Substitutes Parts with different TRIAC type classifications (Standard or Alternistor) that meet voltage, current, and package requirements but may have different gate trigger characteristics.

Parameter Comparison

Parameter	L6008R8	BTA08-600SRG	BTA212-600E,127	BTB08-600CRG	T1225T-6I	T810H-6T
Manufacturer	Littelfuse Inc.	STMicroelectronics	WeEn Semiconductors	STMicroelectronics	STMicroelectronics	STMicroelectronics
TRIAC Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Standard	Alternistor - Snubberless	Logic - Sensitive Gate
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V
Current - On State (It (RMS)) (Max)	8 A	8 A	12 A	8 A	12 A	8 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.5 V	1.3 V	1.3 V	1 V
Current - Gate Trigger (Igt) (Max)	10 mA	10 mA	10 mA	25 mA	25 mA	10 mA
Current - Hold (Ih) (Max)	20 mA	25 mA	25 mA	25 mA	20 mA	25 mA
Operating Temperature Range	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 150°C
Package / Case	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3	TO-220-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 - Preferred Substitutes (Direct Logic - Sensitive Gate Equivalents):

BTA08-600SRG (STMicroelectronics): Matches all critical parameters with the L6008R8. Voltage rating, current capacity, gate trigger voltage, and gate trigger current are identical. Operating temperature range extends to 125°C, exceeding the original specification. Product status is Active with 2022 units in stock. ROHS3 compliant. This part provides direct functional equivalence with extended thermal capability.

T810H-6T (STMicroelectronics): Maintains Logic - Sensitive Gate classification with identical voltage and current ratings. Gate trigger voltage is superior at 1 V maximum (versus 1.3 V). Operating temperature range extends to 150°C. Product status is Active with 2068 units in stock. ROHS3 compliant. This part offers improved gate sensitivity and superior thermal performance.

Tier 2 - Compatible Substitutes (Alternative TRIAC Types):

BTA212-600E,127 (WeEn Semiconductors): Rated for 12 A on-state current, exceeding the 8 A requirement. Maintains 600 V voltage rating and Logic - Sensitive Gate classification. Gate trigger voltage is 1.5 V (slightly higher than original 1.3 V). Product status is Active with 894 units in stock. RoHS compliant. Suitable where higher current capacity is acceptable and gate trigger voltage tolerance permits.

BTB08-600CRG (STMicroelectronics): Matches voltage and current ratings but classified as Standard TRIAC type rather than Logic - Sensitive Gate. Gate trigger current is 25 mA (versus 10 mA original), requiring higher gate drive capability. Product status is Active with 1831 units in stock. ROHS3 compliant. Acceptable only where gate drive circuitry can accommodate higher trigger current requirements.

T1225T-6I (STMicroelectronics): Classified as Alternistor - Snubberless type with 12 A current rating. Maintains 600 V voltage rating and 1.3 V gate trigger voltage. Gate trigger current is 25 mA. Product status is Active with 1900 units in stock. ROHS3 compliant. Suitable for applications where snubberless operation and higher current capacity are beneficial.

Frequently Asked Questions (FAQ)

Q: Can BTA08-600SRG directly replace L6008R8 without circuit modifications?

A: Yes. BTA08-600SRG maintains identical voltage rating (600 V), current rating (8 A), gate trigger voltage (1.3 V maximum), and gate trigger current (10 mA maximum). Both are Logic - Sensitive Gate TRIACs in TO-220-3 packages. No circuit modifications are required.

Q: What is the difference between Logic - Sensitive Gate and Standard TRIAC types?

A: Logic - Sensitive Gate TRIACs require lower gate trigger current (10 mA maximum for L6008R8) compared to Standard TRIACs (25 mA for BTB08-600CRG). Logic - Sensitive Gate types are optimized for direct microcontroller or logic-level gate drive. Standard types require higher gate drive capability. Substituting a Standard type for a Logic - Sensitive Gate type may require gate drive circuit redesign.

Q: Why does T810H-6T have a lower gate trigger voltage (1 V) than L6008R8 (1.3 V)?

A: Lower gate trigger voltage indicates improved gate sensitivity. T810H-6T requires less gate voltage to trigger conduction, making it easier to drive from logic-level sources. This is a beneficial characteristic for direct microcontroller interfacing.

Q: Can I use BTA212-600E,127 (12 A rated) in place of L6008R8 (8 A rated)?

A: Yes, from an electrical compatibility standpoint. The higher current rating (12 A) exceeds the 8 A requirement. However, gate trigger voltage is 1.5 V (versus 1.3 V original), which may affect gate drive circuit performance. Verify that gate drive circuitry can reliably trigger at 1.5 V.

Q: What is the significance of the operating temperature range difference?

A: L6008R8 operates from -40°C to 110°C. Substitute parts extend to 125°C or 150°C. Extended temperature range provides design margin for thermal management but does not affect functionality within the original -40°C to 110°C specification. All substitutes are suitable for the original operating range.

Q: Are all substitute parts RoHS compliant?

A: Yes. L6008R8 is ROHS3 compliant. All substitute parts are either ROHS3 compliant (BTA08-600SRG, BTB08-600CRG, T1225T-6I, T810H-6T) or RoHS compliant (BTA212-600E,127). All meet environmental compliance requirements.

Q: What does "Alternistor - Snubberless" mean for T1225T-6I?

A: Alternistor technology is optimized for AC switching applications and provides inherent snubberless operation, reducing the need for external RC snubber networks. This characteristic is beneficial in AC load switching but does not affect DC or general switching compatibility. T1225T-6I maintains the same voltage and package compatibility as L6008R8.

Q: Which substitute offers the best thermal performance?

A: T810H-6T offers the highest operating temperature range (-40°C to 150°C), providing the greatest thermal margin. BTA212-600E,127 and BTA08-600SRG both extend to 125°C. All exceed the original L6008R8 specification of 110°C maximum.

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