SSQ 15 /5K Equivalent & Substitute Parts

Part Overview

The SSQ 15 /5K is a 15A surface mount board mount fuse manufactured by Bel Fuse Inc., rated for 86V DC operation with fast blow response characteristics. This component is classified as obsolete, necessitating identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part features a 2-SMD square end block package suitable for automated assembly processes.

Substiute Parts

SSQ 15 /5K

Bel Fuse Inc.In Stock: 1200SSQ 15 /5K Datasheet

Current PartRFQ

0679L9150-05

Bel Fuse Inc.In Stock: 646850679L9150-05 Datasheet

DirectRFQ

SSQ 15

Bel Fuse Inc.In Stock: 826SSQ 15 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SSQ 15 /5K is determined by the following critical parameters:

• Current Rating: Must be 15 A
• Mounting Type: Must be Surface Mount
• Package / Case: Must be 2-SMD, Square End Block
• Response Time: Must be Fast Blow
• Voltage Rating - DC: Must support minimum 86 V DC operation
• Operating Temperature Range: Must encompass -55°C ~ 125°C
• RoHS Compliance: Must maintain ROHS3 Compliant status

Two substitute parts meet these criteria with varying voltage ratings and performance characteristics:

0679L9150-05 (Direct Manufacturer Substitute): Maintains identical current rating, package, and response characteristics while providing enhanced voltage rating (125V AC/DC) and improved breaking capacity. Active product status with higher inventory availability.

SSQ 15 (Parametric Equivalent): Identical electrical and mechanical specifications to the main part, differentiated only by packaging format (Cut Tape & Digi-Reel® versus standard packaging).

Parameter Comparison

Engineering Selection Recommendations

For new designs and long-term procurement: 0679L9150-05 is the primary substitute. This part is active in production with significantly higher inventory availability (64,634 pcs vs. 1,167 pcs for the main part). It provides superior voltage rating margin (125V DC vs. 86V DC), enhanced breaking capacity, and includes AEC-Q200 automotive qualification. The marginal difference in melting I²t (104.6 vs. 121) and DC cold resistance (0.0038 vs. 0.004 Ohms) remains within acceptable tolerance for most applications requiring 15A fast blow protection.

For direct parametric equivalence: SSQ 15 maintains identical electrical and thermal characteristics to SSQ 15 /5K, with differentiation limited to packaging format. This option applies only when packaging compatibility with existing procurement systems is required.

Both substitutes maintain ROHS3 compliance and full operating temperature range compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can 0679L9150-05 directly replace SSQ 15 /5K in existing designs?

A: Yes. The 0679L9150-05 meets all critical substitution parameters: 15A current rating, fast blow response, 2-SMD square end block package, and surface mount configuration. The higher voltage rating (125V DC vs. 86V DC) provides additional safety margin and does not create compatibility issues in circuits designed for 86V operation.

Q: What is the difference between SSQ 15 and SSQ 15 /5K?

A: These parts are parametrically identical in electrical and mechanical specifications. The difference is packaging format: SSQ 15 /5K uses standard packaging while SSQ 15 is supplied in Cut Tape & Digi-Reel® format. Both are obsolete products.

Q: Why does 0679L9150-05 have different melting I²t and breaking capacity values?

A: These variations result from the enhanced voltage rating (125V vs. 86V) and represent improved performance characteristics. The melting I²t of 104.6 remains suitable for 15A fast blow protection applications. Breaking capacity differences reflect the part's capability at its rated voltage specification.

Q: Are there compliance or certification differences between the substitutes?

A: 0679L9150-05 includes AEC-Q200 automotive qualification in addition to cURus certification, whereas the original part carries CE and cULus approvals. Both maintain ROHS3 compliance and identical operating temperature ranges.

Q: What packaging options are available for 0679L9150-05?

A: 0679L9150-05 is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly processes.