Littelfuse L2X8E5 TRIAC Equivalent & Substitute Parts

Part Overview

The Littelfuse L2X8E5 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 maintain the same functional configuration while offering enhanced voltage ratings or current capabilities from active manufacturers.

Key Parameters

Parameter	L2X8E5
Manufacturer	Littelfuse Inc.
TRIAC Type	Logic - Sensitive Gate
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	-65°C to 110°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the L2X8E5 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

TRIAC Type: Logic - Sensitive Gate configuration
Current - On State: 800 mA minimum
Voltage - Gate Trigger (Vgt): 1.3 V maximum
Current - Gate Trigger (Igt): 5 mA maximum
Current - Hold (Ih): 10 mA maximum
Mounting Type: Through Hole
Package / Case: TO-92-3 (TO-226AA)
Configuration: Single

Substitution Categories:

Upgrade Path (Higher Voltage Rating): Parts L4X8E5 and L6X8E5 maintain identical gate trigger characteristics and current ratings while providing 400 V and 600 V off-state voltage ratings respectively. These are direct upgrades for applications requiring higher voltage withstand capability.

Cross-Manufacturer Equivalents (STMicroelectronics Z0107MA Series): The Z0107MA 1AA2, Z0107MA 2AL2, and Z0107MA 5AL2 are manufacturer-recommended equivalents from STMicroelectronics. These parts provide 600 V off-state voltage with 1 A on-state current, exceeding the L2X8E5 specifications while maintaining compatible gate trigger parameters and TO-92-3 packaging.

Parameter Comparison

Parameter	L2X8E5	L4X8E5	L6X8E5	Z0107MA 1AA2	Z0107MA 2AL2	Z0107MA 5AL2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics
TRIAC Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
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	-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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
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

For Direct Littelfuse Replacement (Same Manufacturer): Select L4X8E5 or L6X8E5 based on application voltage requirements. Both parts are active products with ROHS3 compliance and maintain identical gate trigger specifications. L4X8E5 provides 400 V rating; L6X8E5 provides 600 V rating. Both support the original 800 mA current specification.

For Cross-Manufacturer Substitution (STMicroelectronics): The Z0107MA series (1AA2, 2AL2, 5AL2 variants) are manufacturer-recommended equivalents offering 600 V off-state voltage with 1 A on-state current. All three variants are active products with ROHS3 and REACH compliance. Selection between variants depends on packaging requirements: Z0107MA 1AA2 is supplied in bulk packaging; Z0107MA 2AL2 and Z0107MA 5AL2 are supplied in cut tape (CT) with formed leads.

Product Status Consideration: The L2X8E5 is obsolete. All substitute parts listed are active products, ensuring long-term availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can L4X8E5 or L6X8E5 be used as direct replacements for L2X8E5? A: Yes. Both parts maintain identical gate trigger voltage (1.3 V max), gate trigger current (5 mA max), hold current (10 mA max), and on-state current (800 mA). The higher voltage ratings (400 V and 600 V respectively) are backward compatible with 200 V applications. Verify circuit voltage requirements before selection.

Q: What is the difference between L6X8E5 and the STMicroelectronics Z0107MA series? A: Both provide 600 V off-state voltage and compatible gate trigger parameters. The Z0107MA series offers higher on-state current (1 A vs. 800 mA) and extended operating temperature range (-40°C to 125°C vs. -65°C to 110°C). Z0107MA parts are available in multiple packaging options (bulk, cut tape with formed leads).

Q: Are the Z0107MA 1AA2, Z0107MA 2AL2, and Z0107MA 5AL2 electrically identical? A: Yes. All three variants are electrically identical Z0107MA parts with identical electrical specifications. Differences are in packaging format: 1AA2 is bulk packaging; 2AL2 and 5AL2 are cut tape with formed leads. Selection depends on assembly process requirements.

Q: Can I use a substitute part with higher current rating (1 A) in place of the original 800 mA part? A: Yes. Higher current ratings are backward compatible. The circuit will operate within the substitute part's specifications. Verify that gate drive circuitry can supply the required gate trigger current (5 mA max for all listed parts).

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are ROHS3 compliant. The STMicroelectronics Z0107MA series also carries REACH compliance certification.

Q: What is the operating temperature difference between Littelfuse and STMicroelectronics parts? A: Littelfuse L2X8E5, L4X8E5, and L6X8E5 operate from -65°C to 110°C. STMicroelectronics Z0107MA series operates from -40°C to 125°C. For applications requiring -65°C operation, use Littelfuse parts. For applications requiring operation above 110°C, use STMicroelectronics parts.

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