SCHURTER 3-103-123 Surface Mount Fuse – Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-103-123 is a 3 A, 125 V AC/DC board mount surface mount fuse with fast blow response time, designed for electronic circuit protection in compact applications. The part is classified as Active product status and is available in Cut Tape packaging. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and packaging compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

3-103-123

SCHURTER Inc.In Stock: 31803-103-123 Datasheet

Current PartRFQ

3410.0037.02

SCHURTER Inc.In Stock: 211923410.0037.02 Datasheet

UpgradeRFQ

3410.0037.03

SCHURTER Inc.In Stock: 37413410.0037.03 Datasheet

UpgradeRFQ

3-103-122

SCHURTER Inc.In Stock: 18353-103-122 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SCHURTER 3-103-123 are qualified based on the following criteria:

Electrical Compatibility: All substitute parts maintain identical current rating (3 A), voltage ratings (125 V AC/DC), response time (Fast Blow), and breaking capacity (50A AC, 300A DC).

Mechanical Compatibility: All substitute parts share the same package type (2-SMD, Square End Block) and physical dimensions (0.126" L x 0.061" W x 0.061" H).

Functional Equivalence: All parts are board mount surface mount fuses with identical fuse type classification (Board Mount, Cartridge Style Excluded).

Compliance & Certification: All substitute parts maintain ROHS3 compliance and REACH unaffected status. Packaging format differences (Cut Tape vs. Tape & Reel) do not affect electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are Active status products from SCHURTER Inc. and maintain full compliance with ROHS3 and REACH requirements. Selection between the main part (3-103-123) and substitutes should be based on:

Packaging Format Requirements: The 3-103-123 and 3-103-122 are supplied in Cut Tape format, suitable for manual assembly or lower-volume pick-and-place operations. The 3410.0037.02 and 3410.0037.03 are supplied in Tape & Reel format, optimized for high-volume automated assembly lines.

Temperature Operating Range: The 3-103-123 and 3-103-122 operate within -55°C to 125°C. The 3410.0037.02 and 3410.0037.03 extend the upper operating temperature to 150°C, providing enhanced thermal margin for high-temperature applications.

Certification Scope: The 3-103-123 and 3-103-122 carry dual approval from cURus and UL. The 3410.0037.02 and 3410.0037.03 carry cURus approval. Verify certification requirements for your specific application before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute 3410.0037.02 or 3410.0037.03 for the 3-103-123 in my circuit design?

A: Yes. Both parts maintain identical electrical ratings (3 A, 125 V AC/DC), response time (Fast Blow), mechanical dimensions, and breaking capacity. The primary differences are packaging format (Tape & Reel vs. Cut Tape) and extended operating temperature range (-55°C to 150°C vs. -55°C to 125°C). Verify your assembly process compatibility with Tape & Reel format and confirm certification requirements.

Q: What is the difference between 3-103-122 and 3-103-123?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. They differ only in packaging format and inventory availability. Both are MGA-A series, Cut Tape format, with -55°C to 125°C operating range and dual cURus/UL approval.

Q: Why do 3410.0037.02 and 3410.0037.03 have different Melting I²t values (0.18 vs. 0.09)?

A: The Melting I²t value is provided as specified in the component data. Both parts maintain identical current rating, voltage rating, and response time classification. Consult SCHURTER technical documentation for detailed thermal characteristics if Melting I²t is a critical design parameter.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed parts (3-103-123, 3-103-122, 3410.0037.02, 3410.0037.03) are ROHS3 compliant and REACH unaffected.

Q: Which part should I select for high-volume production?

A: For high-volume automated assembly, select 3410.0037.02 or 3410.0037.03 (Tape & Reel format). For lower-volume or manual assembly, the 3-103-123 or 3-103-122 (Cut Tape format) are appropriate.