L0103NERP TRIAC Equivalent & Substitute Parts

Part Overview

The L0103NERP is a Logic - Sensitive Gate TRIAC manufactured by Littelfuse Inc., rated for 800 V off-state voltage and 1 A on-state current in a Through Hole TO-92 package. This component is Active in product status and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements permit component sourcing flexibility, inventory constraints exist, or alternative suppliers are preferred while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Triac Type	Logic - Sensitive Gate
Voltage - Off State	800 V
Current - On State (It (RMS)) (Max)	1 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V
Current - Gate Trigger (Igt) (Max)	3 mA
Current - Hold (Ih) (Max)	7 mA
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Configuration	Single

Substitute Part Grouping Explanation

Substitute parts for the L0103NERP are identified based on the following critical parameters that determine functional compatibility:

Triac Type: Logic - Sensitive Gate
Voltage - Off State: 800 V
Current - On State (It (RMS)) (Max): 1 A
Voltage - Gate Trigger (Vgt) (Max): 1.3 V
Operating Temperature: -40°C ~ 125°C (TJ)
Mounting Type: Through Hole
Package / Case: TO-92 or TO-92-3

Substitutes are grouped into two categories based on parameter alignment:

MFR Recommended Substitute: Z0107NA 5AL2 (STMicroelectronics) - Meets all critical electrical parameters with identical voltage and current ratings. Packaging is Cut Tape (CT) versus original Tape & Reel (TR).

Parametric Equivalent: Z0103NA 2AL2 (STMicroelectronics) - Matches all critical electrical parameters including gate trigger current specification. Packaging is Cut Tape (CT) with TO-92-3 supplier device package designation.

Parameter Comparison

Parameter	L0103NERP (Littelfuse)	Z0107NA 5AL2 (STMicroelectronics)	Z0103NA 2AL2 (STMicroelectronics)
Triac Type	Logic - Sensitive Gate	Logic - Sensitive Gate	Logic - Sensitive Gate
Voltage - Off State	800 V	800 V	800 V
Current - On State (It (RMS)) (Max)	1 A	1 A	1 A
Voltage - Gate Trigger (Vgt) (Max)	1.3 V	1.3 V	1.3 V
Current - Gate Trigger (Igt) (Max)	3 mA	5 mA	3 mA
Current - Hold (Ih) (Max)	7 mA	10 mA	7 mA
Current - Non Rep. Surge 50, 60Hz (Itsm)	10A, 12A	8A, 8.5A	8A, 8.5A
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA) Formed Leads	TO-226-3, TO-92-3 (TO-226AA)	TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Packaging Type	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three parts maintain Active product status and ROHS3 compliance. Selection between L0103NERP and substitute parts Z0107NA 5AL2 or Z0103NA 2AL2 depends on the following factors:

L0103NERP (Littelfuse Inc.): Primary choice when Littelfuse sourcing is specified or when non-repetitive surge current rating of 10A/12A is required. Supplied in Tape & Reel packaging.

Z0107NA 5AL2 (STMicroelectronics): MFR recommended substitute when STMicroelectronics sourcing is acceptable. Gate trigger current specification is 5 mA (higher than original 3 mA) and hold current is 10 mA (higher than original 7 mA). Non-repetitive surge current is 8A/8.5A. Supplied in Cut Tape packaging.

Z0103NA 2AL2 (STMicroelectronics): Parametric equivalent when gate trigger current and hold current specifications must match the original L0103NERP (3 mA and 7 mA respectively). Non-repetitive surge current is 8A/8.5A. Supplied in Cut Tape packaging with TO-92-3 supplier device package designation.

All parts are suitable for applications within the specified operating temperature range of -40°C to 125°C (TJ).

Frequently Asked Questions (FAQ)

Q: Can Z0107NA 5AL2 be used as a direct replacement for L0103NERP?

A: Z0107NA 5AL2 is functionally compatible for applications where the higher gate trigger current (5 mA vs. 3 mA) and hold current (10 mA vs. 7 mA) are acceptable. Both parts share identical voltage and on-state current ratings. Verify circuit design tolerances for gate drive requirements before substitution.

Q: What is the difference between Z0107NA 5AL2 and Z0103NA 2AL2?

A: Both are STMicroelectronics TRIAC Logic - Sensitive Gate parts rated 800V/1A. Z0103NA 2AL2 matches the original L0103NERP gate trigger current (3 mA) and hold current (7 mA) specifications exactly. Z0107NA 5AL2 has higher gate trigger current (5 mA) and hold current (10 mA). Both have identical non-repetitive surge current ratings (8A/8.5A).

Q: Does packaging type affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) packaging types are supply format differences only. Electrical performance and specifications remain identical. Packaging selection depends on assembly process requirements and order quantities.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. L0103NERP, Z0107NA 5AL2, and Z0103NA 2AL2 are all ROHS3 compliant and REACH unaffected.

Q: What is the significance of the TO-92-3 supplier device package designation for Z0103NA 2AL2?

A: TO-92-3 is the supplier-specific package designation for the same physical TO-92 form factor. This designation does not affect mechanical or electrical compatibility with TO-92 or TO-226-3 package specifications.

Q: Can these parts be used interchangeably in high-surge applications?

A: L0103NERP has a higher non-repetitive surge current rating (10A/12A) compared to both STMicroelectronics substitutes (8A/8.5A). For applications requiring surge current above 8A/8.5A, L0103NERP is the appropriate choice.

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