Littelfuse L2X8E6 TRIAC Equivalent & Substitute Parts

Part Overview

The Littelfuse L2X8E6 is a Logic-Sensitive Gate TRIAC rated for 200 V off-state voltage with 800 mA on-state current in a TO-92 through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts are selected based on compatible electrical ratings, gate sensitivity characteristics, and identical packaging specifications.

Key Parameters

Parameter	L2X8E6 Specification
Voltage - Off State	200 V
Current - On State (It RMS, Max)	800 mA
Voltage - Gate Trigger (Vgt, Max)	1.3 V
Current - Gate Trigger (Igt, Max)	5 mA
Current - Hold (Ih, Max)	10 mA
Operating Temperature Range	-65°C to 110°C (TJ)
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type	Through Hole
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the L2X8E6 is determined by the following criteria:

Primary Compatibility Parameters:

Triac Type: Logic-Sensitive Gate configuration
Package / Case: TO-226-3 or TO-92-3 (TO-226AA) through-hole
Voltage - Gate Trigger (Vgt, Max): 1.3 V maximum
Current - Gate Trigger (Igt, Max): 5 mA maximum
Current - Hold (Ih, Max): 10 mA maximum
Mounting Type: Through Hole

Voltage Rating Consideration: The L2X8E6 operates at 200 V off-state. Substitute parts with equal or higher voltage ratings (400 V, 600 V) are electrically compatible and provide design margin. Parts with lower voltage ratings are not suitable.

Current Rating Consideration: The L2X8E6 is rated for 800 mA on-state current. Substitute parts with equal or higher current ratings maintain compatibility. Parts with lower current ratings are not suitable.

Parameter Comparison

Parameter	L2X8E6	L4X8E6	L6X8E6	Z0107MA 1AA2	Z0107MA 2AL2	Z0107MA 5AL2
Voltage - Off State	200 V	400 V	600 V	600 V	600 V	600 V
Current - On State (It RMS, Max)	800 mA	800 mA	800 mA	1 A	1 A	1 A
Voltage - Gate Trigger (Vgt, Max)	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt, Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Hold (Ih, Max)	10 mA	10 mA	10 mA	10 mA	10 mA	10 mA
Operating Temperature Range	-65°C to 110°C	-65°C to 110°C	-65°C to 110°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Littelfuse L4X8E6 (400 V Rating) The L4X8E6 is an active Littelfuse product with identical gate sensitivity and current ratings to the L2X8E6. The 400 V off-state voltage provides higher voltage margin while maintaining the same on-state current capacity of 800 mA. This part is suitable for direct substitution in applications where the circuit voltage does not exceed 400 V.

Littelfuse L6X8E6 (600 V Rating) The L6X8E6 is an active Littelfuse product with identical gate sensitivity and current ratings to the L2X8E6. The 600 V off-state voltage provides maximum voltage margin. This part is suitable for direct substitution in applications where the circuit voltage does not exceed 600 V.

STMicroelectronics Z0107MA Series (600 V, 1 A Rating) The Z0107MA 1AA2, Z0107MA 2AL2, and Z0107MA 5AL2 are manufacturer-recommended alternatives from STMicroelectronics. These parts maintain identical gate sensitivity specifications (Vgt 1.3 V max, Igt 5 mA max, Ih 10 mA max) and are rated for 600 V off-state voltage with 1 A on-state current. The higher current rating (1 A versus 800 mA) provides additional design margin. Operating temperature range extends to 125°C (versus 110°C for the L2X8E6). All variants are ROHS3 compliant and REACH unaffected. Packaging variants include Bulk (Z0107MA 1AA2), Cut Tape with formed leads (Z0107MA 2AL2), and Cut Tape (Z0107MA 5AL2).

Frequently Asked Questions (FAQ)

Q: Can the L4X8E6 or L6X8E6 be used as direct replacements for the L2X8E6? A: Yes. Both parts maintain identical gate sensitivity parameters (Vgt, Igt, Ih) and on-state current rating (800 mA). The higher voltage ratings (400 V and 600 V respectively) are compatible with circuits designed for 200 V operation, providing additional voltage margin.

Q: What is the difference between the Littelfuse and STMicroelectronics substitute options? A: Littelfuse options (L4X8E6, L6X8E6) maintain the 800 mA on-state current rating. STMicroelectronics Z0107MA series parts are rated for 1 A on-state current, providing higher current capacity. Both maintain identical gate sensitivity. STMicroelectronics parts also support an extended operating temperature range to 125°C.

Q: Are all substitute parts available in the same TO-92 package? A: Yes. All substitute parts use TO-226-3 or TO-92-3 (TO-226AA) through-hole packaging, ensuring mechanical and electrical compatibility with the original L2X8E6 footprint.

Q: Do the substitute parts meet the same compliance standards as the L2X8E6? A: Yes. All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited). STMicroelectronics parts are additionally REACH unaffected.

Q: Which substitute part should be selected for a new design? A: For new designs, select from active product status parts: L4X8E6, L6X8E6, or Z0107MA series. The choice depends on required voltage rating, current capacity, and operating temperature range. For applications requiring maximum voltage and current margin with extended temperature range, the Z0107MA series is recommended.

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