Equivalent & Substitute Parts for L0103MTRP4

Part Overview

The L0103MTRP4 is a Logic-Sensitive Gate TRIAC rated for 600 V off-state voltage and 1 A on-state current in a surface mount SOT-223 package. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across voltage, current, and gate trigger specifications while accommodating available packaging and manufacturer options.

Key Parameters

Parameter	L0103MTRP4 Value
Voltage - Off State	600 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 Range	-40°C to 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223
Configuration	Single
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following electrical and mechanical criteria:

Primary Substitution Criteria:

Voltage - Off State: 600 V (exact match required)
Current - On State: 1 A (exact match required)
Voltage - Gate Trigger (Vgt): 1.3 V maximum (exact match required)
Mounting Type: Surface Mount (required)
Package / Case: TO-261-4, TO-261AA (required)
Supplier Device Package: SOT-223 or SC-73 (compatible packages)

Secondary Compatibility Parameters:

Current - Gate Trigger (Igt): 3 mA to 10 mA range acceptable
Current - Hold (Ih): 7 mA to 10 mA range acceptable
Operating Temperature: -40°C to 125°C or -40°C to 110°C acceptable
RoHS Status: ROHS3 Compliant or RoHS Compliant acceptable

Parts meeting all primary criteria are direct substitutes. Parts with variations in secondary parameters remain functionally compatible within the specified electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Current - On State (Max)	Vgt (Max)	Igt (Max)	Ih (Max)	Operating Temp	Package	Product Status
L0103MTRP4	Littelfuse	600 V	1 A	1.3 V	3 mA	7 mA	-40°C to 125°C	SOT-223	Obsolete
L0103MTRP	Littelfuse Inc.	600 V	1 A	1.3 V	3 mA	7 mA	-40°C to 125°C	SOT-223	Active
Z0103MNT1G	Littelfuse	600 V	1 A	1.3 V	3 mA	10 mA	-40°C to 125°C	SOT-223	Active
Z0107MNT1G	Littelfuse Inc.	600 V	1 A	1.3 V	5 mA	10 mA	-40°C to 125°C	SOT-223	Active
Z0109MNT1G	Littelfuse Inc.	600 V	1 A	1.3 V	10 mA	10 mA	-40°C to 125°C	SOT-223	Active
Z0103MN0,135	WeEn Semiconductors	600 V	1 A	1.3 V	3 mA	7 mA	-40°C to 125°C	SC-73	Active
Z0107MN 5AA4	STMicroelectronics	600 V	1 A	1.3 V	5 mA	10 mA	-40°C to 125°C	SOT-223	Active
Z0107MN0,135	WeEn Semiconductors	600 V	1 A	1.3 V	5 mA	10 mA	-40°C to 125°C	SC-73	Active
Z0107MN6AA4	STMicroelectronics	600 V	1 A	1.3 V	5 mA	10 mA	-40°C to 125°C	SOT-223	Active
Z0109MN 5AA4	STMicroelectronics	600 V	1 A	1.3 V	10 mA	10 mA	-40°C to 125°C	SOT-223	Active
MAC08MT1G	Littelfuse Inc.	600 V	800 mA	2 V	10 mA	5 mA	-40°C to 110°C	SOT-223	Active

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Specifications):

L0103MTRP (Littelfuse Inc., Active status) is the primary direct substitute. It maintains all electrical parameters of the obsolete L0103MTRP4 and is available in active production with Tape & Reel packaging.

Compatible Substitutes (Within Allowed Parameter Ranges):

Z0103MNT1G, Z0107MNT1G, and Z0109MNT1G (all Littelfuse Inc., Active status) meet all primary substitution criteria. These parts maintain 600 V off-state voltage, 1 A on-state current, and 1.3 V gate trigger voltage. Variations in gate trigger current (Igt) and hold current (Ih) fall within acceptable ranges for logic-sensitive gate TRIAC applications.

Z0103MN0,135 (WeEn Semiconductors, Active status) and Z0107MN0,135 (WeEn Semiconductors, Active status) are compatible substitutes supplied in SC-73 package format. Both maintain electrical specifications within allowed parameters and carry RoHS compliance certification.

Z0107MN 5AA4, Z0107MN6AA4, and Z0109MN 5AA4 (all STMicroelectronics, Active status) are compatible substitutes in SOT-223 packaging with full ROHS3 compliance and REACH unaffected status.

Partial Compatibility:

MAC08MT1G (Littelfuse Inc., Active status) is not a direct substitute. It operates at 800 mA on-state current (below the 1 A requirement) and 2 V gate trigger voltage (above the 1.3 V specification). This part is suitable only for applications with reduced current requirements.

All recommended substitutes carry ROHS3 or RoHS compliance certification and MSL-1 moisture sensitivity rating, matching the environmental qualification of the original part.

Frequently Asked Questions (FAQ)

Q: Can L0103MTRP replace L0103MTRP4 directly?

A: Yes. L0103MTRP is a direct substitute with identical electrical specifications. The primary difference is product status (Active vs. Obsolete) and packaging format (Tape & Reel vs. standard packaging). Both maintain 600 V off-state voltage, 1 A on-state current, and 1.3 V maximum gate trigger voltage.

Q: What is the difference between SOT-223 and SC-73 packages?

A: Both are surface mount packages compatible with TO-261-4 and TO-261AA case designations. SOT-223 is the standard Littelfuse and STMicroelectronics package format. SC-73 is the WeEn Semiconductors equivalent package. Pin configurations and PCB footprints are compatible within the TO-261 family.

Q: Are Z0103MNT1G, Z0107MNT1G, and Z0109MNT1G interchangeable?

A: These parts are electrically compatible within the specified parameter envelope. All maintain 600 V, 1 A, and 1.3 V specifications. Differences exist in gate trigger current (Igt: 3 mA, 5 mA, and 10 mA respectively) and hold current (Ih: 10 mA for all three). Selection depends on application-specific gate drive requirements.

Q: Why is MAC08MT1G not recommended as a substitute?

A: MAC08MT1G operates at 800 mA on-state current and 2 V gate trigger voltage, both outside the primary substitution criteria. It is suitable only for applications with reduced current capacity and higher gate trigger voltage tolerance.

Q: What compliance certifications apply to all substitute parts?

A: All recommended substitutes carry ROHS3 or RoHS compliance certification and MSL-1 (Unlimited) moisture sensitivity rating. STMicroelectronics and Littelfuse parts carry REACH Unaffected status where specified.

Q: Can I use WeEn Semiconductors parts as substitutes?

A: Yes. Z0103MN0,135 and Z0107MN0,135 meet all primary electrical criteria and carry RoHS compliance. They are supplied in SC-73 package format, which is compatible with the TO-261 family. Verify PCB footprint compatibility before implementation.

Q: What is the inventory status of substitute parts?

A: L0103MTRP (2,600 units), Z0103MNT1G (6,640 units), Z0107MNT1G (9,413 units), Z0109MNT1G (19,365 units), Z0103MN0,135 (53,121 units), Z0107MN 5AA4 (51,859 units), Z0107MN0,135 (20,777 units), Z0107MN6AA4 (12,863 units), and Z0109MN 5AA4 (26,300 units) are all available in active stock.

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