L0109MTRP Equivalent & Substitute Parts

Part Overview

The L0109MTRP is a Logic-Sensitive Gate TRIAC thyristor manufactured by Littelfuse Inc., rated for 600 V off-state voltage and 1 A on-state current in a surface mount SOT-223 package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter ranges, enabling design flexibility and supply chain continuity.

Key Parameters

Parameter	L0109MTRP 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)	10 mA
Current - Hold (Ih) (Max)	10 mA
Operating Temperature Range	-40°C ~ 125°C (TJ)
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223
Configuration	Single
Triac Type	Logic - Sensitive Gate

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Primary Substitution Parameters:

Voltage - Off State: 600 V (exact match required)
Current - On State (It (RMS)) (Max): 1 A (exact match required)
Voltage - Gate Trigger (Vgt) (Max): 1.3 V (exact match required)
Triac Type: Logic - Sensitive Gate (exact match required)
Package / Case: TO-261-4, TO-261AA (exact match required)
Supplier Device Package: SOT-223 or SC-73 (compatible surface mount packages)

Secondary Compatibility Parameters:

Current - Gate Trigger (Igt) (Max): Values up to 10 mA are acceptable
Current - Hold (Ih) (Max): Values up to 10 mA are acceptable
Operating Temperature Range: Minimum -40°C and maximum 125°C required
Configuration: Single (exact match required)

Substitute parts are grouped into two categories: MFR Recommended substitutes (direct manufacturer recommendations) and Parametric Equivalents (parts meeting all electrical and mechanical criteria).

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Current - On State (Max)	Voltage - Gate Trigger (Max)	Current - Gate Trigger (Max)	Current - Hold (Max)	Operating Temperature	Package	RoHS Status
L0109MTRP	Littelfuse Inc.	600 V	1 A	1.3 V	10 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
MAC08MT1G	Littelfuse Inc.	600 V	800 mA	2 V	10 mA	5 mA	-40°C ~ 110°C	SOT-223	ROHS3
Z0103MNT1G	Littelfuse	600 V	1 A	1.3 V	3 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0107MNT1G	Littelfuse Inc.	600 V	1 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0103MN 5AA4	STMicroelectronics	600 V	1 A	1.3 V	3 mA	7 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0107MN 5AA4	STMicroelectronics	600 V	1 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0107MN0,135	WeEn Semiconductors	600 V	1 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	SC-73	RoHS
Z0107MN6AA4	STMicroelectronics	600 V	1 A	1.3 V	5 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0109MN0,135	WeEn Semiconductors	600 V	1 A	1.3 V	10 mA	10 mA	-40°C ~ 125°C	SC-73	ROHS3
Z0109MN 5AA4	STMicroelectronics	600 V	1 A	1.3 V	10 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3
Z0109MN 6AA4	STMicroelectronics	600 V	1 A	1.3 V	10 mA	10 mA	-40°C ~ 125°C	SOT-223	ROHS3

Engineering Selection Recommendations

MFR Recommended Substitutes:

Z0103MNT1G, Z0107MNT1G, Z0103MN 5AA4, Z0107MN 5AA4, Z0107MN0,135, Z0107MN6AA4, Z0109MN0,135, and Z0109MN 5AA4 are manufacturer-designated equivalents meeting all primary electrical parameters. All maintain 600 V off-state voltage, 1 A on-state current, and 1.3 V gate trigger voltage. These parts are Active product status with RoHS3 compliance (except Z0107MN0,135 which carries RoHS compliance). Selection among these options depends on gate trigger current requirements and package preference (SOT-223 versus SC-73).

Parametric Equivalents:

Z0109MN 6AA4 meets all electrical specifications and is classified as a parametric equivalent. This part is manufactured by STMicroelectronics with ROHS3 compliance and Active product status.

Limited Substitution:

MAC08MT1G is a Littelfuse part with reduced on-state current (800 mA maximum) and elevated gate trigger voltage (2 V maximum). This part is suitable only when circuit design permits lower current handling and higher gate trigger voltage thresholds. Operating temperature range is limited to -40°C ~ 110°C.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance status. Parts designated with RoHS compliance (Z0107MN0,135) are acceptable for applications where RoHS3 is not explicitly required. REACH Unaffected status is consistent across STMicroelectronics and Littelfuse parts.

Frequently Asked Questions (FAQ)

Q: Can MAC08MT1G replace L0109MTRP directly?

A: MAC08MT1G is not a direct substitute. It has reduced on-state current (800 mA versus 1 A) and higher gate trigger voltage (2 V versus 1.3 V). Use only if circuit design accommodates these parameter differences and lower operating temperature range (-40°C ~ 110°C).

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 and SC-73 differ in physical dimensions and pin configuration. Verify PCB layout compatibility before substituting between package types.

Q: Are STMicroelectronics parts equivalent to Littelfuse parts?

A: STMicroelectronics parts Z0103MN 5AA4, Z0107MN 5AA4, Z0109MN 5AA4, Z0109MN 6AA4, and Z0107MN6AA4 meet all electrical specifications of L0109MTRP. These are parametric or manufacturer-recommended equivalents with identical voltage, current, and temperature ratings.

Q: Which substitute has the lowest gate trigger current?

A: Z0103MNT1G and Z0103MN 5AA4 have the lowest gate trigger current at 3 mA maximum, compared to 10 mA for L0109MTRP. This may affect circuit sensitivity and switching characteristics.

Q: Are all substitutes RoHS3 compliant?

A: Most substitutes are ROHS3 compliant. Z0107MN0,135 (WeEn Semiconductors) carries RoHS compliance without the "3" designation. Verify compliance requirements for your application before selection.

Q: What is the inventory status of substitute parts?

A: All substitute parts listed are in stock. Z0103MN 5AA4 and Z0107MN 5AA4 (STMicroelectronics) have the highest inventory levels at 105,100 and 51,859 units respectively.

Q: Can I use Z0109MN 5AA4 and Z0109MN 6AA4 interchangeably?

A: Yes. Both parts are manufactured by STMicroelectronics with identical electrical specifications. Z0109MN 6AA4 is available in Cut Tape & Digi-Reel packaging, while Z0109MN 5AA4 is supplied in Tape & Reel. Packaging format is the primary distinction.

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