EC103DAP Equivalent & Substitute Parts

Part Overview

The EC103DAP is a 400V 800mA sensitive gate SCR (Silicon Controlled Rectifier) manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is currently active in production with 770 units in stock. The EC103DAP serves as a thyristor for power control applications requiring gate-triggered switching at moderate voltage and current levels.

Substitute parts are necessary when the EC103DAP becomes unavailable, when alternative packaging formats are required, or when design flexibility demands components from different manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	EC103DAP Value	Unit
Voltage - Off State	400	V
Voltage - Gate Trigger (Vgt) Max	800	mV
Current - Gate Trigger (Igt) Max	200	µA
Voltage - On State (Vtm) Max	1.7	V
Current - On State (It RMS) Max	800	mA
Current - Hold (Ih) Max	5	mA
Operating Temperature Range	-40 to 110	°C
Package / Case	TO-92-3	—
Mounting Type	Through Hole	—
SCR Type	Sensitive Gate	—

Substitute Part Grouping Explanation

Substitution eligibility for the EC103DAP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Off State: 400V (exact match required)
SCR Type: Sensitive Gate (exact match required)
Package / Case: TO-92-3 (exact match required)
Mounting Type: Through Hole (exact match required)

Secondary Compatibility Parameters:

Voltage - Gate Trigger (Vgt) Max: 800 mV (must not exceed)
Current - Gate Trigger (Igt) Max: 200 µA (must not exceed)
Current - On State (It RMS) Max: 800 mA (must not exceed)
Current - Hold (Ih) Max: 5 mA (must not exceed)

Parts P0102DA (1AA3, 2AL3, 5AL3) and P0109DA 5AL3 from STMicroelectronics meet all primary and secondary criteria and are direct functional equivalents. Part P0118DA 5AL3 meets primary criteria but has reduced gate trigger current (5 µA vs. 200 µA) and is obsolete. Part X00602MA 2AL2 has a higher off-state voltage (600V vs. 400V) and is obsolete, making it unsuitable for direct substitution.

Parameter Comparison

Parameter	EC103DAP	P0102DA 1AA3	P0102DA 2AL3	P0102DA 5AL3	P0109DA 5AL3	P0118DA 5AL3	X00602MA 2AL2
Voltage - Off State (V)	400	400	400	400	400	400	600
Voltage - Gate Trigger Max (mV)	800	800	800	800	800	800	800
Current - Gate Trigger Max (µA)	200	200	200	200	200	5	200
Voltage - On State Max (V)	1.7	1.95	1.95	1.95	1.95	1.95	1.35
Current - On State RMS Max (mA)	800	800	800	800	800	800	800
Current - Hold Max (mA)	5	5	5	5	5	5	5
Operating Temperature Range (°C)	-40 to 110	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Active	Active	Active	Active	Active	Obsolete	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Recommended Active Substitutes:

P0102DA 5AL3 (STMicroelectronics) is the primary recommended substitute. It maintains all critical electrical parameters within specification, offers the highest inventory availability (35,300 units), and is actively produced. The extended operating temperature range (-40 to 125°C vs. -40 to 110°C) provides additional thermal margin.

P0102DA 2AL3 (STMicroelectronics) is a secondary option with equivalent electrical performance and 10,100 units in stock, available in Cut Tape packaging.

P0102DA 1AA3 (STMicroelectronics) provides the same electrical specifications with 4,848 units available in Bulk packaging.

P0109DA 5AL3 (STMicroelectronics) is functionally equivalent with 3,567 units in stock and serves as a tertiary option.

Obsolete Parts - Not Recommended:

P0118DA 5AL3 has significantly reduced gate trigger current (5 µA vs. 200 µA maximum), altering gate sensitivity characteristics. Product status is obsolete.

X00602MA 2AL2 operates at 600V off-state voltage, exceeding the 400V specification of the EC103DAP. Product status is obsolete.

Frequently Asked Questions (FAQ)

Q: Can P0102DA 5AL3 be used as a direct replacement for EC103DAP?

A: Yes. P0102DA 5AL3 meets all primary substitution criteria: 400V off-state voltage, sensitive gate SCR type, TO-92-3 package, and through-hole mounting. All secondary electrical parameters remain within or equal to EC103DAP specifications.

Q: What is the difference between P0102DA variants (1AA3, 2AL3, 5AL3)?

A: The variants differ in packaging format only. 1AA3 is supplied in Bulk, 2AL3 in Cut Tape, and 5AL3 in Cut Tape with formed leads. Electrical specifications are identical across all three variants.

Q: Why is X00602MA 2AL2 listed as a substitute if it has 600V rating?

A: X00602MA 2AL2 is not a suitable substitute for the EC103DAP. The higher 600V off-state voltage exceeds the 400V requirement and changes circuit behavior. This part is listed only for reference and is obsolete.

Q: Is P0118DA 5AL3 compatible with EC103DAP?

A: P0118DA 5AL3 is not recommended. Although it matches the 400V voltage rating and TO-92-3 package, the gate trigger current is reduced to 5 µA (vs. 200 µA), significantly altering gate sensitivity. Additionally, this part is obsolete.

Q: What packaging options are available for active substitutes?

A: Active STMicroelectronics P0102DA substitutes are available in three packaging formats: Bulk (1AA3), Cut Tape (2AL3), and Cut Tape with formed leads (5AL3). All maintain identical electrical specifications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts, including obsolete variants, carry RoHS3 compliance certification.

Q: What is the inventory status of recommended substitutes?

A: P0102DA 5AL3 has the highest availability with 35,300 units in stock. P0102DA 2AL3 has 10,100 units, P0102DA 1AA3 has 4,848 units, and P0109DA 5AL3 has 3,567 units available.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message