SCHURTER 3-103-126 Surface Mount Fuse: Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-103-126 is a 4 A, 63 V AC/DC board mount surface mount fuse in 2-SMD, Square End Block package configuration. This component is classified as Active product status and is designed for fast-blow response applications requiring board-level fuse protection. Substitute parts may be required due to inventory availability, packaging format needs, or application-specific voltage and current rating requirements.

Substiute Parts

3-103-126

SCHURTER Inc.In Stock: 10743-103-126 Datasheet

Current PartRFQ

3410.0037.02

SCHURTER Inc.In Stock: 211923410.0037.02 Datasheet

UpgradeRFQ

3-103-127

SCHURTER Inc.In Stock: 25763-103-127 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3-103-126 are classified into two categories based on allowed electrical and mechanical parameters:

Parametric Equivalent (Same Electrical Specifications): Part 3-103-127 maintains identical electrical ratings (4 A, 63 V AC/DC) and mechanical dimensions. The only difference is packaging format: 3-103-127 is supplied in Cut Tape (CT) format versus the original Tape & Reel (TR) format of 3-103-126. Both parts are from the MGA-A series and are suitable for direct substitution when packaging format compatibility is not a constraint.

Upgrade Substitute (Higher Voltage Rating): Part 3410.0037.02 provides higher voltage capability (125 V AC/DC) with a lower current rating (3 A). This part is from the MGA series and features enhanced operating temperature range (-55°C ~ 150°C). Substitution is valid only in applications where the circuit voltage does not exceed 63 V and the required fuse current is 3 A or less.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution (Identical Electrical Performance): Select 3-103-127 when packaging format compatibility permits. This part maintains all electrical and thermal specifications of the 3-103-126 while offering alternative packaging in Cut Tape format. Both parts carry cURus and UL approvals and are ROHS3 compliant.

For Voltage-Upgraded Applications: Select 3410.0037.02 only when circuit design allows reduction of fuse current from 4 A to 3 A and the application benefits from the higher 125 V voltage rating. This part extends the operating temperature range to 150°C and provides enhanced DC breaking capacity (300 A DC). Approval is limited to cURus certification.

Compliance Considerations: All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. The main part and parametric equivalent both carry UL approval, while the upgrade substitute carries cURus approval only.

Frequently Asked Questions (FAQ)

Q: Can 3-103-127 be used as a direct replacement for 3-103-126? A: Yes. Both parts have identical electrical ratings (4 A, 63 V AC/DC), mechanical dimensions, response time, and thermal specifications. The only difference is packaging format: 3-103-127 is supplied in Cut Tape (CT) while 3-103-126 is supplied in Tape & Reel (TR). Substitution is valid if your assembly process accommodates Cut Tape format.

Q: Under what conditions can 3410.0037.02 substitute for 3-103-126? A: Substitution is valid only when both conditions are met: (1) the circuit voltage does not exceed 63 V AC or DC, and (2) the required fuse current is 3 A or less. The lower current rating of 3410.0037.02 makes it unsuitable for circuits requiring 4 A protection.

Q: What are the key differences between the parametric equivalent and upgrade substitute? A: The parametric equivalent (3-103-127) maintains identical electrical specifications with different packaging. The upgrade substitute (3410.0037.02) offers higher voltage rating (125 V) and extended temperature range (-55°C ~ 150°C) but requires lower current rating (3 A instead of 4 A).

Q: Are all three parts RoHS compliant? A: Yes. All three parts are ROHS3 compliant and REACH unaffected.

Q: What are the approval differences between these parts? A: The main part (3-103-126) and parametric equivalent (3-103-127) carry both cURus and UL approvals. The upgrade substitute (3410.0037.02) carries cURus approval only.