EC103D3RP Equivalent & Substitute Parts

Part Overview

The EC103D3RP is a 400V 800mA sensitive gate SCR manufactured by Littelfuse Inc. in TO-92 through-hole packaging. This component is currently active in production with 1041 units in stock. The part operates across a temperature range of -40°C to 110°C and is ROHS3 compliant. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	EC103D3RP Value
Voltage - Off State	400 V
Voltage - Gate Trigger (Vgt) (Max)	800 mV
Current - Gate Trigger (Igt) (Max)	500 µA
Voltage - On State (Vtm) (Max)	1.7 V
Current - On State (It (RMS)) (Max)	800 mA
Current - Hold (Ih) (Max)	8 mA
SCR Type	Sensitive Gate
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
Operating Temperature	-40°C ~ 110°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EC103D3RP is determined by the following critical parameters: off-state voltage rating, gate trigger voltage and current specifications, on-state voltage and current ratings, hold current, SCR type classification, through-hole mounting compatibility, and TO-92-3 package format. Parts are grouped into two categories based on these criteria:

Category 1: Direct Electrical Equivalents (400V Rating) Parts meeting all primary electrical specifications with 400V off-state voltage rating, 800mV gate trigger voltage, sensitive gate type, and compatible through-hole TO-92-3 packaging. These parts maintain functional equivalence across all critical operating parameters.

Category 2: Voltage-Rated Alternatives (600V Rating) Parts with elevated off-state voltage rating (600V) that provide enhanced voltage margin while maintaining compatible gate trigger specifications, sensitive gate type, and through-hole TO-92-3 packaging. These parts are suitable for applications where higher voltage headroom is acceptable or beneficial.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Voltage - Gate Trigger (Vgt) (Max)	Current - Gate Trigger (Igt) (Max)	Voltage - On State (Vtm) (Max)	Current - On State (It (RMS)) (Max)	Current - Hold (Ih) (Max)	Operating Temperature	Product Status	Packaging
EC103D3RP	Littelfuse Inc.	400 V	800 mV	500 µA	1.7 V	800 mA	8 mA	-40°C ~ 110°C	Active	Tape & Reel (TR)
P0102DA 1AA3	STMicroelectronics	400 V	800 mV	200 µA	1.95 V	800 mA	5 mA	-40°C ~ 125°C	Active	Bulk
P0102DA 2AL3	STMicroelectronics	400 V	800 mV	200 µA	1.95 V	800 mA	5 mA	-40°C ~ 125°C	Active	Cut Tape (CT)
P0102DA 5AL3	STMicroelectronics	400 V	800 mV	200 µA	1.95 V	800 mA	5 mA	-40°C ~ 125°C	Active	Cut Tape (CT)
P0109DA 5AL3	STMicroelectronics	400 V	800 mV	200 µA	1.95 V	800 mA	5 mA	-40°C ~ 125°C	Active	Cut Tape (CT)
P0118DA 5AL3	STMicroelectronics	400 V	800 mV	5 µA	1.95 V	800 mA	5 mA	-40°C ~ 125°C	Obsolete	Cut Tape (CT)
X00602MA 2AL2	STMicroelectronics	600 V	800 mV	200 µA	1.35 V	800 mA	5 mA	-40°C ~ 125°C	Obsolete	Cut Tape (CT)

Engineering Selection Recommendations

Active Production Alternatives (Recommended)

The P0102DA series (1AA3, 2AL3, 5AL3) and P0109DA 5AL3 represent the primary substitution path for EC103D3RP. All four parts are currently in active production status with ROHS3 compliance and extended operating temperature range (-40°C to 125°C). These parts maintain 400V off-state voltage rating and 800mV gate trigger voltage specification. Inventory availability ranges from 4848 to 35300 units across packaging variants (Bulk, Cut Tape). Selection among these variants depends on procurement quantity and packaging format requirements.

Obsolete Status Parts (Limited Use)

P0118DA 5AL3 and X00602MA 2AL2 carry obsolete product status and should be considered only when active alternatives are unavailable. P0118DA 5AL3 maintains 400V rating but exhibits significantly lower gate trigger current (5 µA maximum). X00602MA 2AL2 operates at elevated 600V off-state voltage and is suitable only for applications where higher voltage rating provides design benefit. Both parts have limited remaining inventory (2400 and 4432 units respectively).

Compliance and Certification

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), REACH Unaffected status, and identical ECCN/HTSUS classifications as the primary part. These certifications ensure regulatory equivalence across all listed alternatives.

Frequently Asked Questions (FAQ)

Q: Can P0102DA series parts directly replace EC103D3RP in existing designs?

A: Yes. The P0102DA series (all variants) maintains the same 400V off-state voltage, 800mV gate trigger voltage, sensitive gate type, and TO-92-3 through-hole package. Operating temperature range extends to 125°C. Differences in gate trigger current (200 µA vs. 500 µA) and on-state voltage (1.95V vs. 1.7V) are within acceptable substitution parameters for most applications.

Q: What is the difference between P0102DA 1AA3, 2AL3, and 5AL3?

A: These part numbers represent the same electrical specifications with different packaging formats. 1AA3 is supplied in Bulk packaging, while 2AL3 and 5AL3 are supplied in Cut Tape (CT) format. The 5AL3 variant has the highest inventory availability (35300 units). Selection depends on procurement quantity and assembly process requirements.

Q: Is X00602MA 2AL2 suitable as a substitute?

A: X00602MA 2AL2 is an obsolete part with 600V off-state voltage rating. It is suitable only when higher voltage margin is required and the design can accommodate the elevated rating. This part should not be selected as a primary alternative due to obsolete status and limited remaining inventory.

Q: Why is P0118DA 5AL3 listed as obsolete?

A: P0118DA 5AL3 carries obsolete product status and should be avoided for new designs. While it maintains 400V rating and compatible packaging, the significantly lower gate trigger current specification (5 µA) may affect circuit behavior. Active alternatives from the P0102DA series are preferred.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, matching the regulatory profile of EC103D3RP.

Q: What packaging options are available for active substitutes?

A: Active substitutes are available in Bulk (P0102DA 1AA3) and Cut Tape (P0102DA 2AL3, P0102DA 5AL3, P0109DA 5AL3) formats. The original EC103D3RP is supplied in Tape & Reel (TR) format. Packaging selection should align with assembly equipment and procurement volume requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message