SSQC 4 Equivalent & Substitute Parts

Part Overview

The SSQC 4 is a 4A 125VAC/VDC 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 necessary for ongoing design support and procurement planning. The part requires a dedicated holder for installation and operates across a temperature range of -55°C to 125°C with fast blow response characteristics.

Substiute Parts

SSQC 4

Bel Fuse Inc.In Stock: 993SSQC 4 Datasheet

Current PartRFQ

3404.0016.22

SCHURTER Inc.In Stock: 13963404.0016.22 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSQC 4 is determined by the following critical parameters:

• Current Rating: 4 A (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)
• Fuse Type: Board Mount, Cartridge Style Excluded (exact match required)
• Operating Temperature Range: -55°C to 125°C (minimum requirement)
• RoHS and REACH Compliance: ROHS3 Compliant, REACH Unaffected (regulatory requirement)

The substitute part 3404.0016.22 manufactured by SCHURTER Inc. meets all critical electrical and mechanical parameters. Physical dimensions and package lead style (J-Lead vs. Square End Block with Clip) may differ, requiring verification of holder compatibility during integration.

Parameter Comparison

Engineering Selection Recommendations

The 3404.0016.22 from SCHURTER Inc. is an active product that satisfies all critical electrical parameters matching the SSQC 4. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The substitute part features higher breaking capacity (100A vs. 50A AC/300A DC) and lower melting I²t (2.1 vs. 5.1), indicating faster response to overcurrent conditions. Physical package differences (J-Lead vs. Square End Block with Clip) require confirmation of mechanical compatibility with existing holder assemblies prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the 3404.0016.22 be used as a direct replacement for the SSQC 4?

A: The 3404.0016.22 matches all critical electrical specifications: 4A current rating, 125V AC/DC voltage rating, and fast blow response. However, the package lead style differs (J-Lead vs. Square End Block with Clip), requiring verification that the existing fuse holder accommodates the substitute part's physical configuration.

Q: What are the key differences between these two fuses?

A: Both fuses share identical current, voltage, and response time ratings. The SCHURTER part has higher breaking capacity (100A vs. 50A AC/300A DC) and lower melting I²t (2.1 vs. 5.1). The SSQC 4 is obsolete while the 3404.0016.22 is an active product with current manufacturing support.

Q: Are there compliance or certification differences?

A: Both parts are ROHS3 compliant and REACH unaffected. The 3404.0016.22 carries cURus approval certification. No compliance barriers exist for substitution.

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

A: Mechanical compatibility with the fuse holder assembly is the primary consideration. The J-Lead package of the 3404.0016.22 must fit within the existing holder designed for the SSQC 4's square end block with clip configuration. Electrical performance is equivalent across all specified operating conditions.