EC103M1AP Equivalent & Substitute Parts

Part Overview

The EC103M1AP is a 600V, 800mA sensitive gate SCR (Silicon Controlled Rectifier) manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is classified as Active status and is RoHS3 compliant. Substitute parts are necessary when the EC103M1AP becomes unavailable, when alternative packaging formats are required, or when higher current ratings are needed within the same voltage and gate sensitivity specifications.

Key Parameters

Parameter	EC103M1AP
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	-40°C ~ 110°C
Mounting Type	Through Hole
Package / Case	TO-92-3
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the EC103M1AP is determined by the following critical parameters:

Voltage Rating (Off State): Must be 600V minimum
SCR Type: Must be Sensitive Gate classification
Mounting Type: Must be Through Hole
Package / Case: Must be TO-92-3 compatible
Gate Trigger Voltage (Vgt): Must not exceed 800 mV
RoHS Compliance: Must maintain ROHS3 compliance status

Substitute parts are grouped into two categories:

Category A - Direct Current Rating Equivalents (800 mA RMS): Parts maintaining the original 800 mA RMS current specification with identical voltage and gate characteristics. These include P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 2AL2, X00602MA 5AL2, and X00619MA5AL2.

Category B - Higher Current Rating Alternatives (1.25 A RMS): Parts with upgraded current handling capability (1.25 A RMS) while maintaining 600V voltage rating and sensitive gate operation. These include X0202MA 1BA2, X0202MA 2BL2, and X0205MA 2BL2. These parts are suitable for applications requiring higher current capacity within the same voltage envelope.

Parameter Comparison

Parameter	EC103M1AP	P0111MA 1AA3	P0118MA 2AL3	X00602MA 1AA2	X00602MA 2AL2	X00602MA 5AL2	X00619MA5AL2	X0202MA 1BA2	X0202MA 2BL2	X0205MA 2BL2
Voltage - Off State	600 V	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	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	50 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	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	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	5 mA
SCR Type	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate	Sensitive Gate
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	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
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	TO-92-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the EC103M1AP.

For Direct Replacement (800 mA RMS Current Rating):

P0111MA 1AA3 (STMicroelectronics, Bulk packaging) and P0118MA 2AL3 (STMicroelectronics, Cut Tape packaging) are primary substitutes with Active product status. Both support extended operating temperature range (-40°C to 125°C) compared to the original part. P0111MA 1AA3 offers higher inventory availability (5373 pcs).

X00602MA 1AA2 (STMicroelectronics, Bulk packaging, Active status) and X00602MA 5AL2 (STMicroelectronics, Cut Tape packaging, Active status) provide lower on-state voltage (1.35V vs 1.7V) and higher gate trigger current specification (200 µA). X00602MA 2AL2 (Cut Tape packaging) is available but carries Obsolete product status and should be avoided for new designs.

X00619MA5AL2 (STMicroelectronics, Cut Tape packaging, Active status) offers identical electrical characteristics to the X00602MA series with 6400 pcs inventory availability.

For Higher Current Applications (1.25 A RMS Current Rating):

X0202MA 1BA2 (STMicroelectronics, Bulk packaging, Active status) and X0202MA 2BL2 (STMicroelectronics, Cut Tape packaging, Active status) provide 56% higher RMS current capacity while maintaining 600V voltage rating and sensitive gate operation. These are suitable for applications requiring increased current handling within the same voltage envelope.

X0205MA 2BL2 (STMicroelectronics, Cut Tape packaging, Active status) offers the same 1.25 A RMS current rating with lower gate trigger current specification (50 µA) and limited inventory (736 pcs).

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher gate trigger current (Igt) than the EC103M1AP?

A: Yes. The EC103M1AP specifies 12 µA maximum gate trigger current. Substitute parts with higher Igt values (25 µA, 50 µA, or 200 µA) will function in the circuit but require higher gate drive current. Verify that your gate drive circuit can supply the required current for the selected substitute.

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

A: The 800 mA RMS substitutes (P0111MA 1AA3, P0118MA 2AL3, X00602MA series, X00619MA5AL2) maintain the original current rating. The 1.25 A RMS substitutes (X0202MA series, X0205MA 2BL2) provide higher current capacity for applications requiring increased load current while maintaining the same 600V voltage rating and sensitive gate characteristics.

Q: Are all substitute parts available in the same packaging as the EC103M1AP?

A: All substitute parts use TO-92-3 through-hole packaging compatible with the EC103M1AP footprint. However, packaging format varies: Bulk, Cut Tape (CT), and Tape & Box (TB). Verify packaging compatibility with your procurement and assembly requirements.

Q: Why do some substitutes have Obsolete product status?

A: X00602MA 2AL2 is marked Obsolete. For new designs, select only Active status parts: P0111MA 1AA3, P0118MA 2AL3, X00602MA 1AA2, X00602MA 5AL2, X00619MA5AL2, X0202MA 1BA2, X0202MA 2BL2, or X0205MA 2BL2.

Q: What is the operating temperature difference between the EC103M1AP and substitutes?

A: The EC103M1AP operates from -40°C to 110°C. All STMicroelectronics substitutes extend the upper limit to 125°C, providing 15°C additional thermal margin. This is beneficial for high-temperature applications but does not affect substitution compatibility.

Q: How do I select between multiple substitute options?

A: Selection depends on three factors: (1) Current requirement—use 800 mA substitutes for equivalent performance or 1.25 A substitutes for higher current applications; (2) Gate drive capability—lower Igt values (5 µA, 12 µA, 25 µA) require less gate drive current; (3) Packaging format—Bulk for high-volume procurement, Cut Tape for automated assembly, Tape & Box for mixed requirements.

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