EC103M2 Equivalent & Substitute Parts

Part Overview

The EC103M2 is a sensitive gate silicon controlled rectifier (SCR) rated for 600 V off-state voltage and 800 mA on-state current, manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, thermal operating range, package compatibility, and regulatory compliance to ensure functional interchangeability in circuit applications.

Key Parameters

Parameter	EC103M2 Value
Voltage - Off State	600 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	50 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	-40°C ~ 110°C
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the EC103M2 are qualified based on the following criteria:

Mandatory Matching Parameters:

Voltage - Off State: 600 V
Voltage - Gate Trigger (Vgt) (Max): 800 mV
SCR Type: Sensitive Gate
Mounting Type: Through Hole
Package / Case: TO-92-3 (TO-226AA)
RoHS Status: ROHS3 Compliant

Allowable Variations:

Current - Gate Trigger (Igt) (Max): Substitute values up to 200 µA are acceptable (higher gate trigger current does not prevent operation)
Voltage - On State (Vtm) (Max): Substitute values between 1.35 V and 1.7 V are acceptable
Current - On State (It (RMS)) (Max): Substitute values of 800 mA or higher are acceptable
Operating Temperature: Extended range (-40°C ~ 125°C) is acceptable

Substitute Parts Identified:

X00602MA 1AA2 and X00602MA 5AL2 (STMicroelectronics) meet all mandatory parameters with identical electrical ratings and extended temperature range. Packaging differs only in form factor (Bulk vs. Cut Tape with Formed Leads).

X00619MA5AL2 (STMicroelectronics) meets all mandatory parameters with identical electrical ratings and extended temperature range in Cut Tape packaging with Formed Leads.

X0202MA 1BA2 and X0202MA 2BL2 (STMicroelectronics) meet all mandatory parameters with higher current capability (1.25 A RMS vs. 800 mA RMS) and extended temperature range. These parts are suitable for applications requiring higher current handling.

Parameter Comparison

Parameter	EC103M2	X00602MA 1AA2	X00602MA 5AL2	X00619MA5AL2	X0202MA 1BA2	X0202MA 2BL2
Manufacturer	Littelfuse Inc.	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Voltage - Off State	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
Current - Gate Trigger (Igt) (Max)	50 µA	200 µA	200 µA	200 µA	200 µA	200 µA
Voltage - On State (Vtm) (Max)	1.7 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	1.25 A	1.25 A
Current - Hold (Ih) (Max)	5 mA	5 mA	5 mA	5 mA	5 mA	5 mA
Operating Temperature	-40°C ~ 110°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3	TO-226-3, TO-92-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original EC103M2 component.

For direct electrical equivalence: X00602MA 1AA2, X00602MA 5AL2, and X00619MA5AL2 provide identical current ratings (800 mA RMS) with improved on-state voltage characteristics (1.35 V vs. 1.7 V maximum). These parts are suitable for applications requiring no design modification.

For enhanced current capability: X0202MA 1BA2 and X0202MA 2BL2 provide 1.25 A RMS current rating, enabling use in higher-current applications while maintaining all other electrical parameters. These parts are suitable when circuit design permits increased current handling.

Packaging considerations: X00602MA 1AA2 is supplied in Bulk packaging; X00602MA 5AL2, X00619MA5AL2, X0202MA 2BL2 are supplied in Cut Tape with Formed Leads; X0202MA 1BA2 is supplied in Bulk packaging. Selection depends on assembly process requirements.

Temperature range: All substitute parts support extended operating temperature range (-40°C ~ 125°C) compared to the original part (-40°C ~ 110°C), providing additional thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can X00602MA series parts directly replace EC103M2 in existing designs?

A: Yes. X00602MA 1AA2 and X00602MA 5AL2 are direct electrical equivalents with identical voltage and current ratings. Both maintain TO-92-3 through-hole packaging and sensitive gate SCR topology. The primary difference is packaging format (Bulk vs. Cut Tape with Formed Leads).

Q: What is the difference between X00602MA and X0202MA substitute parts?

A: X00602MA parts maintain the 800 mA RMS current rating of the original EC103M2. X0202MA parts provide higher current capability at 1.25 A RMS, suitable for applications requiring increased current handling. Both families share identical voltage ratings and gate trigger characteristics.

Q: Are the STMicroelectronics substitutes compatible with the original TO-92-3 package footprint?

A: Yes. All substitute parts use TO-92-3 (TO-226AA) through-hole packaging, maintaining mechanical and electrical compatibility with existing PCB layouts designed for the EC103M2.

Q: What does the higher gate trigger current (200 µA vs. 50 µA) mean for circuit operation?

A: The substitute parts require up to 200 µA gate trigger current compared to 50 µA for the original part. This represents a less sensitive gate characteristic. Circuits designed for the EC103M2 will operate with substitute parts, as gate drive circuits typically provide sufficient current margin. No circuit redesign is required.

Q: Can I use X0202MA parts as a drop-in replacement if my application only requires 800 mA?

A: Yes. X0202MA parts are rated for 1.25 A RMS and will operate correctly in applications requiring 800 mA or less. The higher current rating provides additional design margin without affecting circuit functionality.

Q: What is the significance of the extended operating temperature range (-40°C ~ 125°C)?

A: All substitute parts support a wider temperature range than the original EC103M2 (-40°C ~ 110°C). This extended range provides additional thermal margin and may enable use in higher-temperature environments without design modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts (X00602MA 1AA2, X00602MA 5AL2, X00619MA5AL2, X0202MA 1BA2, X0202MA 2BL2) are ROHS3 compliant, matching the regulatory status of the original EC103M2.

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