EC103BRP Equivalent & Substitute Parts

Part Overview

The EC103BRP is a Littelfuse Sensitive Gate SCR rated for 200 V off-state voltage with 800 mA on-state current in a TO-92 through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The EC103BRP shares a common base product number (EC103) with active alternatives that maintain functional compatibility while offering higher voltage ratings.

Substiute Parts

EC103BRP

LittelfuseIn Stock: 929EC103BRP Datasheet

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EC103DRP

Littelfuse Inc.In Stock: 4835EC103DRP Datasheet

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EC103MRP

Littelfuse Inc.In Stock: 1088EC103MRP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the EC103BRP are determined by the following criteria:

Mandatory Compatibility Parameters:

• SCR Type: Sensitive Gate (must match)
• Voltage - Gate Trigger (Vgt) (Max): 800 mV (must match)
• Current - Gate Trigger (Igt) (Max): 200 µA (must match)
• Voltage - On State (Vtm) (Max): 1.7 V (must match)
• Current - On State (It (RMS)) (Max): 800 mA (must match)
• Current - Hold (Ih) (Max): 5 mA (must match)
• Operating Temperature: -40°C ~ 110°C (must match)
• Mounting Type: Through Hole (must match)
• Package / Case: TO-226-3, TO-92-3 (TO-226AA) Formed Leads (must match)

Variable Parameter (Allows Substitution):

• Voltage - Off State: May be equal to or greater than 200 V

The EC103BRP can be substituted with parts having higher off-state voltage ratings (EC103DRP at 400 V, EC103MRP at 600 V) because higher voltage ratings provide backward compatibility in applications designed for lower voltages. All substitute parts maintain identical gate trigger characteristics, on-state performance, and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

EC103DRP (400 V Rating): This part is classified as Active and ROHS3 Compliant. It provides a 2× voltage margin over the EC103BRP while maintaining all electrical and thermal characteristics. Suitable for applications where the EC103BRP was specified and higher voltage headroom is acceptable.

EC103MRP (600 V Rating): This part is classified as Active and ROHS3 Compliant. It provides a 3× voltage margin over the EC103BRP while maintaining all electrical and thermal characteristics. Suitable for applications where the EC103BRP was specified and maximum voltage margin is desired.

Both substitute parts share the EC103 base product number and are manufactured by Littelfuse Inc. Selection between EC103DRP and EC103MRP depends on application voltage requirements and packaging format availability (Cut Tape versus Tape & Reel).

Frequently Asked Questions (FAQ)

Q: Can EC103DRP or EC103MRP be used as direct replacements for EC103BRP?

A: Yes. Both parts maintain identical gate trigger voltage, gate trigger current, on-state voltage, on-state current, hold current, SCR type classification, operating temperature range, mounting type, and package configuration. The higher off-state voltage ratings provide backward compatibility in circuits designed for 200 V operation.

Q: What is the difference between EC103DRP and EC103MRP?

A: The primary difference is the off-state voltage rating: EC103DRP is rated for 400 V while EC103MRP is rated for 600 V. All other electrical parameters and thermal specifications are identical. Packaging format differs (Cut Tape versus Tape & Reel).

Q: Why is EC103BRP classified as obsolete?

A: The EC103BRP is no longer in active production. The EC103DRP and EC103MRP are the active alternatives within the EC103 product family and are recommended for new designs and production orders.

Q: Are there any compatibility concerns with the TO-92 package?

A: No. All three parts use identical TO-226-3, TO-92-3 (TO-226AA) Formed Leads packaging with through-hole mounting. Pin configuration and physical dimensions are compatible.

Q: Do all parts meet RoHS compliance requirements?

A: Yes. EC103BRP, EC103DRP, and EC103MRP are all ROHS3 Compliant.