GSAP 1-R Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GSAP 1-R is a 1 A, 250 V AC 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 applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and approval certifications to ensure direct interchangeability without circuit redesign.

Substiute Parts

GSAP 1-R

Bel Fuse Inc.In Stock: 738GSAP 1-R Datasheet

Current PartRFQ

0325001.MXP

Littelfuse Inc.In Stock: 9110325001.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSAP 1-R is determined by the following mandatory parameters:

• Current Rating: 1 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The substitute part 0325001.MXP manufactured by Littelfuse Inc. meets all mandatory substitution criteria and is classified as active product status, providing long-term availability for replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The 0325001.MXP from Littelfuse Inc. is the qualified substitute for the obsolete GSAP 1-R. Selection is based on:

• Identical current and AC voltage ratings (1 A, 250 V AC)
• Matching ceramic cartridge fuse type and slow-blow response characteristic
• Identical 3AB/3AG package and through-hole mounting configuration
• Dimensional compatibility within manufacturing tolerances
• Equivalent operating temperature range (-55°C ~ 125°C)
• Active product status ensuring continued availability
• Full regulatory compliance with CE, CSA, PSE, and UL certifications
• ROHS3 compliance maintained

The substitute part provides enhanced DC voltage rating (125 V DC) and higher breaking capacity (100A AC, 10kA DC) compared to the original specification, offering improved performance margins in applications requiring DC circuit protection.

Frequently Asked Questions (FAQ)

Q: Can the 0325001.MXP directly replace the GSAP 1-R without circuit modification?

A: Yes. Both parts share identical current rating (1 A), AC voltage rating (250 V), fuse type (ceramic cartridge), response time (slow blow), and package configuration (3AB/3AG, 1/4" x 1-1/4" axial). Physical dimensions are within manufacturing tolerance, and mounting is identical through-hole configuration.

Q: What is the significance of the DC voltage rating difference?

A: The GSAP 1-R does not specify a DC voltage rating, while the 0325001.MXP is rated for 125 V DC. In AC-only applications, this difference is not relevant. In mixed AC/DC circuits, the 0325001.MXP provides explicit DC protection capability.

Q: Are the approval certifications equivalent?

A: Both parts carry CE, CSA, and PSE certifications. The 0325001.MXP additionally carries UL certification, while the GSAP 1-R carries cULus certification. Both meet North American and international regulatory requirements for ceramic fuse cartridges.

Q: What is the impact of the melting I²t and resistance differences?

A: The melting I²t values (16 vs. 16.3) and DC cold resistance values (0.374 vs. 0.389 Ohms) are within normal manufacturing variation for ceramic fuses of this specification. These minor differences do not affect functional interchangeability in standard circuit protection applications.

Q: Why is the GSAP 1-R classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The 0325001.MXP, classified as active, ensures long-term supply availability for replacement and maintenance applications.