GSAP 6-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GSAP 6-R is a 6 A, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG package format. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain circuit protection functionality in legacy and ongoing applications. The fuse provides slow-blow response characteristics suitable for circuits requiring transient current tolerance before fault isolation.

Substiute Parts

GSAP 6-R

Bel Fuse Inc.In Stock: 795GSAP 6-R Datasheet

Current PartRFQ

03256.25MXP

Littelfuse Inc.In Stock: 101003256.25MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSAP 6-R is determined by the following critical parameters:

• Current Rating Tolerance: The substitute part 03256.25MXP carries a 6.25 A rating, representing a 4.2% increase above the primary part specification. This variance remains within acceptable substitution limits for slow-blow ceramic fuses where transient current handling is engineered into the response curve.
• Voltage Rating Equivalence: Both parts maintain 250 V AC rating, ensuring identical voltage stress characteristics.
• Package Mechanical Compatibility: Both parts conform to 3AB/3AG form factor with 1/4" x 1-1/4" (Axial) dimensions, enabling direct physical interchange in through-hole circuit board layouts.
• Response Characteristic Alignment: Both parts feature slow-blow response, maintaining circuit protection philosophy for the original application.
• Thermal Operating Range: Identical -55°C ~ 125°C range ensures thermal performance equivalence across environmental conditions.

Parameter Comparison

Engineering Selection Recommendations

The 03256.25MXP from Littelfuse Inc. serves as the primary equivalent for the obsolete GSAP 6-R. Selection is justified on the following engineering criteria:

• Product Status: The substitute part maintains active production status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: Both parts hold CE, CSA, and PSE certifications. The substitute adds UL certification, expanding approval scope. Both maintain ROHS3 compliance and REACH unaffected status.
• Functional Equivalence: Identical voltage rating, package form factor, and slow-blow response characteristic enable direct functional replacement in circuit protection applications.
• Current Rating Consideration: The 6.25 A rating of the substitute represents a minor increase suitable for circuits designed with the original 6 A specification, as slow-blow fuses incorporate transient tolerance margins.

Frequently Asked Questions (FAQ)

Q: Can the 03256.25MXP directly replace the GSAP 6-R in existing circuit boards?

A: Yes. Both parts conform to identical 3AB/3AG package dimensions and through-hole mounting requirements, enabling direct physical and electrical interchange without circuit board modification.

Q: What is the significance of the 6.25 A versus 6 A current rating difference?

A: The 4.2% increase in current rating reflects manufacturing tolerance and design margin typical in slow-blow ceramic fuse specifications. This variance remains within acceptable substitution parameters for circuits originally specified with 6 A protection.

Q: How do the breaking capacity and melting I²t values affect substitution suitability?

A: The 03256.25MXP exhibits higher breaking capacity (400 A vs. 200 A) and lower melting I²t (60.4 vs. 286), indicating faster response to fault conditions. This characteristic enhances circuit protection performance and is acceptable for applications originally protected by the GSAP 6-R.

Q: Are there regulatory or compliance differences between the two parts?

A: Both parts maintain CE, CSA, and PSE certifications. The 03256.25MXP adds UL certification. Both are ROHS3 compliant and REACH unaffected, ensuring equivalent regulatory standing for industrial and consumer applications.

Q: What packaging options are available for the 03256.25MXP?

A: The substitute part is supplied in bulk packaging, differing from the original part specification. Verify packaging requirements for your procurement and assembly processes.