SSQC 500 Equivalent & Substitute Parts

Part Overview

The SSQC 500 is a 500 mA, 125 V AC/DC surface mount board mount fuse manufactured by Bel Fuse Inc. in a 2-SMD square end block with clip package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning. Substitute parts must maintain identical electrical ratings and compatible mechanical interfaces to ensure reliable circuit protection without design modification.

Substiute Parts

SSQC 500

Bel Fuse Inc.In Stock: 1054SSQC 500 Datasheet

Current PartRFQ

3404.0045.22

SCHURTER Inc.In Stock: 27463404.0045.22 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSQC 500 is determined by the following mandatory parameters:

• Current Rating: 500 mA (exact match required)
• Voltage Rating AC: 125 V (exact match required)
• Voltage Rating DC: 125 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Operating Temperature Range: -55°C to 125°C (minimum requirement)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The SCHURTER 3404.0045.22 meets all mandatory electrical and environmental parameters. While package geometry differs (J-Lead vs. Square End Block with Clip), both are surface mount 2-SMD configurations suitable for board-level integration. Mechanical compatibility must be verified against specific PCB footprint requirements during implementation.

Parameter Comparison

Engineering Selection Recommendations

The SCHURTER 3404.0045.22 is an active product with current manufacturing status, providing supply chain continuity for the obsolete SSQC 500. Both components carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The SCHURTER part includes cURus approval certification, providing additional third-party validation for safety-critical applications.

Electrical performance is equivalent across all specified parameters. The primary consideration is mechanical compatibility: the SCHURTER component uses a J-Lead package configuration versus the SSQC 500's square end block with clip design. PCB footprint geometry and holder interface requirements must be evaluated during component selection to ensure proper mechanical fit and electrical contact.

Frequently Asked Questions (FAQ)

Q: Can the SCHURTER 3404.0045.22 be used as a direct replacement for the SSQC 500?

A: Electrical substitution is valid based on identical current, voltage, and response time ratings. Mechanical compatibility requires verification of PCB footprint design and fuse holder specifications, as package geometry differs between the two components.

Q: What are the key differences between these two fuse components?

A: Both components share identical electrical specifications (500 mA, 125 V AC/DC, fast blow response). Differences include: package style (J-Lead vs. square end block with clip), physical dimensions, breaking capacity ratings (100A vs. 50A AC/300A DC), and melting I²t values (0.01 vs. 0.07). These differences do not affect circuit protection function at rated parameters.

Q: Is the SCHURTER part suitable for applications requiring the SSQC 500?

A: Yes, provided that PCB footprint and fuse holder design accommodate the J-Lead package configuration. Electrical performance and environmental operating range are equivalent. Compliance certifications (ROHS3, REACH, EAR99) are identical.

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

A: Confirm PCB footprint compatibility with the J-Lead package geometry. Verify fuse holder specifications accept the SCHURTER component dimensions (7.40mm L x 3.10mm W x 2.60mm H). Validate that existing circuit protection requirements are met by the specified breaking capacity and melting I²t characteristics.

Q: Are there supply or packaging differences between these components?

A: The SSQC 500 is obsolete with limited remaining inventory (968 pcs). The SCHURTER 3404.0045.22 is an active product with higher inventory availability (2720 pcs) supplied in tape and reel packaging, supporting automated assembly processes.