GSAP 12-R Equivalent & Substitute Parts

Part Overview

The GSAP 12-R is a 12A 125VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 3AB/3AG package format. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and repair operations. Substitute parts must maintain electrical compatibility while meeting the same mechanical and thermal specifications.

Substiute Parts

GSAP 12-R

Bel Fuse Inc.In Stock: 917GSAP 12-R Datasheet

Current PartRFQ

0325012.MXP

Littelfuse Inc.In Stock: 22940325012.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSAP 12-R is determined by the following critical parameters:

• Current Rating: Must be 12 A
• Package / Case: Must be 3AB, 3AG, 1/4" x 1-1/4" (Axial) for mechanical compatibility
• Fuse Type: Must be Cartridge, Ceramic
• Response Time: Must be Slow Blow
• Mounting Type: Must be Through Hole
• Operating Temperature Range: Must support -55°C ~ 125°C

The substitute part 0325012.MXP from Littelfuse Inc. meets all these criteria. While the substitute offers higher AC voltage rating (250V vs 125V) and DC voltage capability (60V), these represent enhanced specifications that do not compromise compatibility in applications rated for 125VAC operation.

Parameter Comparison

Engineering Selection Recommendations

The 0325012.MXP from Littelfuse Inc. is the qualified substitute for the obsolete GSAP 12-R. Selection is based on:

• Identical current rating and package dimensions ensure direct mechanical and electrical compatibility
• Active product status ensures ongoing availability and supply chain continuity
• Both components hold equivalent regulatory certifications (CE, CSA, PSE) with the substitute offering additional UL and K-MARK approvals
• Both components meet ROHS3 and REACH compliance requirements
• The substitute's higher voltage ratings (250VAC, 60VDC) provide enhanced capability without compromising performance in 125VAC applications
• Dimensional tolerance between components (0.003" diameter, 0.008" length) falls within standard mechanical assembly tolerances

Frequently Asked Questions (FAQ)

Q: Can the 0325012.MXP directly replace the GSAP 12-R in existing assemblies?

A: Yes. Both components share identical current ratings (12A), package designations (3AB, 3AG), and physical dimensions within standard tolerances. Through-hole mounting compatibility is confirmed.

Q: Why does the substitute have a higher voltage rating?

A: The 0325012.MXP is rated for 250VAC and 60VDC, compared to the GSAP 12-R's 125VAC rating. Higher voltage ratings indicate enhanced electrical capability and do not affect compatibility in circuits designed for 125VAC operation.

Q: Are there differences in response time characteristics?

A: Both components are classified as Slow Blow fuses with identical response time characteristics, ensuring equivalent protection behavior in the circuit.

Q: What is the significance of the DC cold resistance difference?

A: The GSAP 12-R has 0.008 Ohms while the 0325012.MXP has 0.0067 Ohms. This minor difference (approximately 16% lower) is within acceptable tolerance for ceramic cartridge fuses and does not impact circuit performance.

Q: Are regulatory certifications equivalent?

A: Both components hold CE, CSA, and PSE certifications. The substitute additionally carries UL and K-MARK approvals, providing broader regulatory coverage without compromising existing compliance requirements.

Q: What is the inventory status for each component?

A: The GSAP 12-R (obsolete) has 864 pieces in stock. The 0325012.MXP (active product) has 2200 pieces available, ensuring long-term supply availability.