EC103M1RP Equivalent & Substitute Parts

Part Overview

The EC103M1RP is a 600V, 800mA sensitive gate SCR manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This thyristor is designed for applications requiring controlled rectification and switching at moderate voltage and current levels. The part is currently active in production with 1063 units in stock. Equivalent and substitute parts are necessary when the original manufacturer part becomes unavailable, when alternative packaging formats are required, or when design flexibility demands components from different manufacturers with compatible electrical and mechanical specifications.

Key Parameters

Parameter	EC103M1RP Value
Voltage - Off State	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	12 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	5 mA
SCR Type	Sensitive Gate
Operating Temperature Range	-40°C to 110°C
Mounting Type	Through Hole
Package / Case	TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the EC103M1RP is determined by the following critical parameters:

Voltage Rating (Off State): Must be 600V minimum to maintain blocking capability
Gate Trigger Voltage (Vgt): Maximum 800 mV ensures gate sensitivity compatibility
On-State Current Rating (It RMS): Must support 800 mA continuous operation
SCR Type: Sensitive gate classification required for low gate trigger current applications
Mounting Type: Through-hole configuration with TO-92-3 package compatibility
Operating Temperature: Minimum -40°C to 110°C range required
Compliance: ROHS3 compliance and EAR99 classification maintained across all substitutes

Substitute parts are grouped into two categories based on on-state current capability:

Category A (800 mA RMS): P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 2AL2, X00602MA 5AL2, X00619MA5AL2 — Direct current rating equivalents with identical 800 mA RMS specification.

Category B (1.25 A RMS): X0202MA 1BA2, X0202MA 2BL2 — Higher current rated alternatives with enhanced surge capability, suitable for applications requiring additional current margin.

Parameter Comparison

Parameter	EC103M1RP	P0111MA 1AA3	P0118MA 2AL3	X00602MA 1AA2	X00602MA 2AL2	X00602MA 5AL2	X00619MA5AL2	X0202MA 1BA2	X0202MA 2BL2
Voltage - Off State	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV	800 mV
Current - Gate Trigger (Igt) (Max)	12 µA	25 µA	5 µA	200 µA	200 µA	200 µA	200 µA	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 V	1.95 V	1.95 V	1.35 V	1.35 V	1.35 V	1.35 V	1.45 V	1.45 V
Current - On State (It (RMS)) (Max)	800 mA	800 mA	800 mA	800 mA	800 mA	800 mA	800 mA	1.25 A	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Current - Off State (Max)	1 µA	10 µA	10 µA	1 µA	1 µA	1 µA	1 µA	5 µA	5 µA
Operating Temperature Range	-40°C to 110°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Product Status	Active	Active	Active	Active	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Direct Current Rating)

P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 5AL2, and X00619MA5AL2 are recommended as primary substitutes. All maintain 600V blocking voltage, 800 mV gate trigger voltage, and 800 mA RMS on-state current rating. All are ROHS3 compliant and EAR99 classified. P0118MA 2AL3 offers the lowest gate trigger current specification at 5 µA maximum, providing enhanced gate sensitivity. X00602MA series parts feature lower on-state voltage (1.35V maximum) compared to the EC103M1RP (1.7V maximum), resulting in reduced power dissipation. All primary substitutes support extended operating temperature to 125°C, exceeding the EC103M1RP specification of 110°C maximum.

Secondary Substitutes (Higher Current Rating)

X0202MA 1BA2 and X0202MA 2BL2 provide 1.25A RMS on-state current capability with identical 600V voltage rating and 800 mV gate trigger specification. These parts are suitable for applications requiring additional current margin or where load current may approach the 800 mA limit. Both maintain ROHS3 compliance and EAR99 classification.

Avoid

X00602MA 2AL2 is classified as obsolete and should not be selected for new designs despite technical compatibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute EC103M1RP with any of the listed parts?

A: Yes, all listed active-status parts are electrically and mechanically compatible. The EC103M1RP can be directly replaced with P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 5AL2, X00619MA5AL2, X0202MA 1BA2, or X0202MA 2BL2 without circuit modification. Avoid X00602MA 2AL2 due to obsolete status.

Q: What is the difference between 800 mA and 1.25 A rated parts?

A: The EC103M1RP, P0111MA 1AA3, P0118MA 2AL3, X00602MA series, and X00619MA5AL2 are rated for 800 mA RMS continuous current. X0202MA 1BA2 and X0202MA 2BL2 are rated for 1.25 A RMS, providing 56% additional current capacity. Selection depends on actual load current requirements. Higher-rated parts offer design margin but are not required if load current remains below 800 mA.

Q: Are all substitutes available in the same packaging?

A: Yes, all listed substitutes use TO-92-3 (TO-226AA) through-hole packaging, identical to the EC103M1RP. Packaging variants (Bulk, Cut Tape, Tape & Reel) differ only in supply format and do not affect electrical or mechanical compatibility.

Q: What is the gate trigger current difference between parts?

A: Gate trigger current (Igt) varies across substitutes: EC103M1RP at 12 µA, P0111MA 1AA3 at 25 µA, P0118MA 2AL3 at 5 µA, and X00602MA/X00619MA/X0202MA series at 200 µA. Lower gate trigger current requires less gate drive power. Higher gate trigger current provides greater noise immunity. Circuit gate drive capability must accommodate the selected part's Igt specification.

Q: Does operating temperature range affect substitution?

A: The EC103M1RP operates from -40°C to 110°C. All listed substitutes extend this range to -40°C to 125°C, providing superior thermal performance. This extended range does not prevent substitution; it represents an improvement for applications requiring higher temperature operation.

Q: What is the significance of on-state voltage differences?

A: On-state voltage (Vtm) affects power dissipation. EC103M1RP maximum is 1.7V. X00602MA and X00619MA series offer 1.35V maximum, reducing dissipation by approximately 21%. P0111MA 1AA3 and P0118MA 2AL3 specify 1.95V maximum, increasing dissipation by approximately 15%. For high-current or thermally constrained applications, lower on-state voltage is advantageous.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitutes maintain ROHS3 compliance and EAR99 classification, matching the EC103M1RP environmental and export regulatory status.

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