SSQC 6.3 Equivalent & Substitute Parts

Part Overview

The SSQC 6.3 is a 6.3 A, 125 V AC/DC board mount fuse manufactured by Bel Fuse Inc. in a surface mount 2-SMD square end block configuration with clip. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and procurement planning. The fast-blow response characteristic and compact SMD form factor define its application scope in circuit protection for low-voltage electronic assemblies.

Substiute Parts

SSQC 6.3

Bel Fuse Inc.In Stock: 1145SSQC 6.3 Datasheet

Current PartRFQ

3404.0018.11

SCHURTER Inc.In Stock: 19033404.0018.11 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSQC 6.3 is determined by strict equivalence across the following parameters:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating: 125 V AC and 125 V DC (both required)
• Response Time: Fast Blow
• Mounting Type: Surface Mount
• Fuse Type: Board Mount (Cartridge Style Excluded)
• Operating Temperature Range: -55°C to 125°C minimum
• RoHS Compliance: ROHS3 Compliant

The SCHURTER 3404.0018.11 meets all substitution criteria. Both components share identical electrical ratings, response characteristics, and environmental specifications. Physical package differences (square end block with clip versus J-Lead) are acceptable variations within the 2-SMD surface mount category, provided the PCB footprint and holder compatibility are verified during integration.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 3404.0018.11 is a direct functional equivalent for the obsolete SSQC 6.3. Both components satisfy identical electrical and environmental requirements. The SCHURTER part carries Active product status with cURus approval certification, providing supply continuity and regulatory compliance assurance.

Physical package differences require PCB footprint verification and holder compatibility assessment prior to design implementation. The SCHURTER component exhibits higher breaking capacity (100A versus 50A AC/300A DC) and marginally lower melting I²t (14 versus 15), both favorable characteristics for circuit protection performance.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 3404.0018.11 be used as a direct replacement for the SSQC 6.3?

A: Yes, provided PCB footprint and fuse holder compatibility are confirmed. Both components share identical electrical ratings, voltage specifications, and response characteristics. Physical package geometry differs (square end block with clip versus J-Lead), requiring mechanical validation.

Q: What are the critical parameters for fuse substitution?

A: Current rating, AC/DC voltage ratings, response time, and operating temperature range must match exactly. The SSQC 6.3 and 3404.0018.11 are equivalent across all these parameters.

Q: Does the difference in breaking capacity affect substitution suitability?

A: Breaking capacity is a protective characteristic. The SCHURTER part's higher breaking capacity (100A) does not compromise substitution eligibility and represents an improvement in fault current handling capability.

Q: Are there compliance or certification differences between these parts?

A: Both components are ROHS3 compliant and REACH unaffected. The SCHURTER part carries cURus certification. No compliance barriers exist for substitution.

Q: What should be verified before implementing the SCHURTER substitute?

A: Confirm PCB footprint compatibility with the J-Lead package configuration and verify that the existing fuse holder accommodates the SCHURTER component's physical dimensions and lead style.