L201E6 Equivalent & Substitute Parts

Part Overview

The L201E6 is a Logic-Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 200 V off-state voltage and 1 A on-state current in a Through Hole TO-92 package. This component is classified as Obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part is ROHS3 compliant and suitable for applications requiring sensitive gate triggering in low-voltage AC switching circuits.

Key Parameters

Parameter	Value
Manufacturer Part Number	L201E6
Manufacturer	Littelfuse Inc.
Category	Thyristors
Triac Type	Logic - Sensitive Gate
Voltage - Off State	200 V
Current - On State (It (RMS)) (Max)	1 A
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 ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the L201E6 is determined by the following critical parameters:

Triac Type: Logic - Sensitive Gate configuration must be maintained
Current Rating: On-state current (It (RMS)) must be ≥ 1 A
Gate Trigger Characteristics: Voltage (Vgt) and current (Igt) must remain compatible at specified maximums
Hold Current (Ih): Must not exceed 10 mA maximum
Mounting Type: Through Hole configuration required
Package: TO-92 or TO-92-3 package compatibility
Operating Temperature Range: Must support -40°C minimum or lower
Compliance: ROHS3 compliance required

Substitute parts are grouped into two categories:

Upgrade Substitutes (Littelfuse Inc.): L401E6 and L601E6 provide higher off-state voltage ratings (400 V and 600 V respectively) while maintaining identical on-state current, gate trigger parameters, and thermal characteristics. These are direct functional upgrades suitable for applications requiring higher voltage withstand capability.

Manufacturer Recommended Substitute (STMicroelectronics): Z0107MA 1AA2 is a cross-manufacturer equivalent offering 600 V off-state voltage with identical gate trigger and hold current specifications, providing an alternative source from a different manufacturer while maintaining core electrical compatibility.

Parameter Comparison

Parameter	L201E6	L401E6	L601E6	Z0107MA 1AA2
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.	STMicroelectronics
Voltage - Off State	200 V	400 V	600 V	600 V
Current - On State (It (RMS)) (Max)	1 A	1 A	1 A	1 A
Voltage - Gate Trigger (Vgt) (Max)	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
Current - Hold (Ih) (Max)	10 mA	10 mA	10 mA	10 mA
Operating Temperature	-65°C ~ 125°C	-65°C ~ 125°C	-65°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Voltage Rating): No direct 200 V equivalent is available among active products. The L201E6 is obsolete with no active-status substitute at identical voltage specification.

For Voltage-Upgraded Applications: L401E6 (400 V) and L601E6 (600 V) are both Active products from Littelfuse Inc. with identical on-state current, gate trigger parameters, and thermal operating range. Both maintain ROHS3 compliance and are suitable for designs where higher voltage withstand is acceptable or beneficial.

For Cross-Manufacturer Sourcing: Z0107MA 1AA2 from STMicroelectronics is an Active product offering 600 V rating with matching gate trigger and hold current specifications. This part has a narrower operating temperature range (-40°C to 125°C versus -65°C to 125°C) and should be evaluated if the lower temperature limit is acceptable for the application.

Compliance Consideration: All substitute parts maintain ROHS3 compliance, ensuring regulatory alignment with the original L201E6.

Frequently Asked Questions (FAQ)

Q: Can L401E6 or L601E6 be used as direct replacements for L201E6?

A: Yes, functionally. Both parts maintain identical on-state current (1 A), gate trigger voltage (1.3 V max), gate trigger current (5 mA max), and hold current (10 mA max). The higher off-state voltage ratings (400 V and 600 V) represent upgrades that do not compromise compatibility in circuits designed for 200 V operation. Verify that the circuit design does not depend on the specific 200 V voltage rating.

Q: What is the difference between L601E6 and Z0107MA 1AA2?

A: Both parts are rated for 600 V off-state voltage and 1 A on-state current with identical gate trigger parameters. The primary difference is the operating temperature range: L601E6 supports -65°C to 125°C, while Z0107MA 1AA2 supports -40°C to 125°C. Select based on the minimum operating temperature requirement of your application.

Q: Are all substitute parts available in the same TO-92 package?

A: Yes. L401E6, L601E6, and Z0107MA 1AA2 are all available in TO-92-3 (TO-226AA) Through Hole packages, ensuring mechanical and pin compatibility with the original L201E6.

Q: Why is the L201E6 listed as Obsolete?

A: The L201E6 is no longer in active production. Littelfuse Inc. offers higher-voltage alternatives (L401E6 and L601E6) that provide superior voltage withstand capability while maintaining identical current and gate trigger specifications, making the 200 V rating obsolete for most applications.

Q: Can Z0107MA 1AA2 be used in applications requiring the full -65°C to 125°C temperature range?

A: No. Z0107MA 1AA2 is rated only to -40°C minimum. If your application requires operation below -40°C, use L601E6 or L401E6, which both support -65°C minimum operating temperature.

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