SCHURTER 3-103-103 Equivalent & Substitute Parts

Part Overview

The SCHURTER 3-103-103 is a 750 mA surface mount board mount fuse rated for 125 V AC/DC operation. This fast-blow fuse is designed for SMD applications with a 2-SMD square end block package configuration. The part is currently active in production with full cURus and UL approval certifications. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility for board mount fuse applications requiring identical current, voltage, and response characteristics.

Substiute Parts

3-103-103

SCHURTER Inc.In Stock: 33223-103-103 Datasheet

Current PartRFQ

3410.0029.02

SCHURTER Inc.In Stock: 32003410.0029.02 Datasheet

UpgradeRFQ

3410.0029.03

SCHURTER Inc.In Stock: 37233410.0029.03 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 3-103-103 are qualified based on the following electrical and mechanical parameters:

• Current Rating: 750 mA (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: 2-SMD, Square End Block (exact match required)
• Breaking Capacity: 50 A AC, 300 A DC (exact match required)
• Physical Dimensions: 0.126" L x 0.061" W x 0.061" H (exact match required)
• Approval Certifications: cURus and/or UL (maintained across substitutes)
• RoHS Compliance: ROHS3 Compliant (maintained across substitutes)

The substitute parts 3410.0029.02 and 3410.0029.03 meet all electrical and mechanical compatibility requirements. The primary difference between the main part and substitutes is packaging format (Cut Tape versus Tape & Reel) and extended operating temperature range on substitute parts (-55°C ~ 150°C versus -55°C ~ 125°C on the main part).

Parameter Comparison

Engineering Selection Recommendations

All three parts—3-103-103, 3410.0029.02, and 3410.0029.03—are active production components from SCHURTER Inc. with ROHS3 compliance and REACH unaffected status. The 3-103-103 carries dual cURus and UL certifications, while the substitute parts 3410.0029.02 and 3410.0029.03 carry cURus certification. Selection between these parts should be based on packaging requirements (Cut Tape versus Tape & Reel) and operating temperature range needs. The substitute parts offer an extended operating temperature range of -55°C to 150°C compared to the main part's -55°C to 125°C range, providing additional thermal margin for applications requiring higher temperature operation within the specified limits.

Frequently Asked Questions (FAQ)

Q: Can 3410.0029.02 and 3410.0029.03 be used as direct replacements for 3-103-103 on a PCB?

A: Yes. All three parts share identical electrical ratings (750 mA, 125 V AC/DC, fast-blow response), mechanical dimensions (0.126" L x 0.061" W x 0.061" H), and package configuration (2-SMD, square end block). PCB footprints and solder pad layouts are compatible.

Q: What is the difference between the substitute parts 3410.0029.02 and 3410.0029.03?

A: Both parts are electrically and mechanically identical. They differ only in packaging format and inventory availability. Both are supplied in Tape & Reel format and share the same base product number 3410.0029.

Q: Why do the substitute parts have an extended operating temperature range?

A: The substitute parts 3410.0029.02 and 3410.0029.03 are rated for -55°C to 150°C operation, compared to -55°C to 125°C for the main part 3-103-103. This extended range provides additional thermal margin for applications operating at elevated temperatures.

Q: Are there certification differences between the main part and substitutes?

A: The main part 3-103-103 carries cURus and UL certifications. The substitute parts 3410.0029.02 and 3410.0029.03 carry cURus certification. Both certification levels meet industry standards for board mount fuse applications.

Q: What packaging formats are available?

A: The main part 3-103-103 is supplied in Cut Tape (CT) format. The substitute parts 3410.0029.02 and 3410.0029.03 are supplied in Tape & Reel (TR) format. Selection depends on assembly line requirements and volume needs.

Q: Are all parts RoHS compliant?

A: Yes. All three parts—3-103-103, 3410.0029.02, and 3410.0029.03—are ROHS3 compliant and REACH unaffected.