GSAP 600-R Equivalent & Substitute Parts

Part Overview

The GSAP 600-R is a 600 mA, 250 V AC ceramic cartridge fuse manufactured by Bel Fuse Inc. in the 3AB, 3AG form factor with slow-blow response characteristics. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for applications requiring ceramic cartridge fuses with these electrical specifications.

Substiute Parts

GSAP 600-R

Bel Fuse Inc.In Stock: 1232GSAP 600-R Datasheet

Current PartRFQ

0325.600MXP

Littelfuse Inc.In Stock: 12200325.600MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSAP 600-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 600 mA (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 (exact match required)

The substitute part 0325.600MXP manufactured by Littelfuse Inc. meets all critical electrical and mechanical parameters. The substitute maintains identical current rating, AC voltage rating, ceramic cartridge construction, slow-blow response, and physical form factor. The substitute is classified as active product status, ensuring ongoing availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

The 0325.600MXP from Littelfuse Inc. is the direct equivalent substitute for the obsolete GSAP 600-R. Both components share identical electrical ratings (600 mA, 250 V AC), ceramic cartridge construction, slow-blow response characteristics, and 3AB/3AG form factor with through-hole mounting.

The substitute part carries active product status, ensuring long-term availability and supply chain continuity. The substitute holds broader regulatory approvals (CE, CSA, UL) compared to the original part (CSA, cULus) and maintains ROHS3 compliance. Both components operate across the identical temperature range of -55°C to 125°C.

Physical dimensions are nominally equivalent within standard manufacturing tolerances. The substitute exhibits lower DC cold resistance (0.9495 Ohms versus 1.05 Ohms) and lower melting I²t (3.9 versus 8.5), with significantly higher breaking capacity ratings (100A AC, 10kA DC versus 35A). These differences reflect modern fuse design standards and do not preclude direct substitution in applications designed for the original part specifications.

Frequently Asked Questions (FAQ)

Q: Can the 0325.600MXP directly replace the GSAP 600-R in existing designs?

A: Yes. Both components share identical current rating (600 mA), AC voltage rating (250 V), ceramic cartridge construction, slow-blow response, and 3AB/3AG form factor. Physical dimensions are nominally equivalent. The substitute is suitable for direct replacement in through-hole mounting applications.

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

A: The GSAP 600-R does not specify a DC voltage rating, while the 0325.600MXP specifies 125 V DC. For AC-only applications, this difference is not relevant. For applications requiring DC operation, the substitute provides explicit DC rating specification.

Q: How do the breaking capacity differences affect substitution?

A: The substitute exhibits higher breaking capacity (100A AC, 10kA DC) compared to the original (35A). Higher breaking capacity indicates improved fault current handling capability and reflects current industry standards. This does not preclude substitution; the substitute is suitable for the same application envelope.

Q: Are there physical mounting compatibility concerns?

A: Physical dimensions are nominally equivalent (0.268" Dia x 1.291" L for original versus 0.275" Dia x 1.288" L for substitute). Variations fall within standard manufacturing tolerances for 3AB/3AG cartridge fuses and do not affect through-hole mounting compatibility.

Q: What regulatory approvals apply to the substitute part?

A: The 0325.600MXP holds CE, CSA, and UL approvals, with ROHS3 compliance. The original GSAP 600-R holds CSA and cULus approvals. The substitute provides broader regulatory coverage suitable for international applications.

Q: Why is the melting I²t value lower for the substitute?

A: The melting I²t value (3.9 for substitute versus 8.5 for original) reflects differences in fuse element design and thermal characteristics. Both values are within acceptable ranges for 600 mA slow-blow ceramic cartridge fuses. The lower value indicates faster thermal response under fault conditions, consistent with modern fuse design standards.