GSA 375-R Equivalent & Substitute Parts

Part Overview

The GSA 375-R is a 375 mA ceramic cartridge fuse rated for 250 V AC operation, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and repair applications. The fuse requires a standard 3AB/3AG holder and operates across an industrial temperature range of -55°C to 125°C. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without modification to existing fuse holders or mounting infrastructure.

Substiute Parts

GSA 375-R

Bel Fuse Inc.In Stock: 704GSA 375-R Datasheet

Current PartRFQ

0326.375MXP

Littelfuse Inc.In Stock: 7840326.375MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSA 375-R is based on the following critical parameters that must remain constant:

• Current Rating: 375 mA (exact match required)
• Voltage Rating - AC: 250 V (minimum requirement)
• Fuse Type: Cartridge, Ceramic (form factor and technology)
• Response Time: Slow Blow (circuit protection characteristic)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (mechanical compatibility with existing holders)
• Operating Temperature Range: -55°C ~ 125°C (environmental compatibility)

The substitute part 0326.375MXP from Littelfuse Inc. meets all these criteria. Additional capabilities in the substitute part (125 V DC rating, higher breaking capacity) do not compromise compatibility and represent enhanced performance margins for the AC application.

Parameter Comparison

Engineering Selection Recommendations

The 0326.375MXP from Littelfuse Inc. is a direct functional equivalent for the obsolete GSA 375-R. Both components share identical current ratings, AC voltage ratings, ceramic cartridge construction, slow-blow response characteristics, and mechanical package specifications. The substitute part maintains full compliance with RoHS3 requirements and carries active product status with established supply availability.

The 0326.375MXP provides enhanced electrical performance through higher breaking capacity ratings and DC voltage capability, which do not negatively impact AC-only applications. Regulatory certifications (CE, CSA, UL) on the substitute part satisfy the same compliance framework as the original component. DC cold resistance values are equivalent within engineering tolerance (2.14 Ω vs. 2.155 Ω), ensuring consistent thermal and electrical behavior in circuit operation.

Frequently Asked Questions (FAQ)

Q: Can the 0326.375MXP be used as a direct replacement for the GSA 375-R without holder modification?

A: Yes. Both components use identical 3AB/3AG package specifications with matching physical dimensions (1/4" x 1-1/4"), ensuring direct compatibility with existing fuse holders without mechanical alteration.

Q: What is the significance of the DC voltage rating on the substitute part?

A: The 0326.375MXP includes a 125 V DC rating, whereas the GSA 375-R does not specify DC operation. For AC-only applications, this additional capability has no impact on performance. The component remains suitable for 250 V AC circuits.

Q: Are the thermal and electrical characteristics equivalent?

A: Yes. Both components operate across -55°C to 125°C and exhibit nearly identical DC cold resistance (2.14 Ω vs. 2.155 Ω). Slow-blow response times and melting I²t characteristics ensure equivalent circuit protection behavior in the intended application.

Q: Does the higher breaking capacity of the substitute part affect circuit protection?

A: No. Breaking capacity defines the maximum fault current the fuse can safely interrupt. The higher rating (100 A AC vs. 35 A) on the substitute part provides additional safety margin and does not alter the fuse's response to normal or overload conditions at 375 mA.

Q: Are both components RoHS3 compliant?

A: Yes. Both the GSA 375-R and 0326.375MXP meet ROHS3 compliance requirements and are REACH unaffected, satisfying environmental and regulatory standards for industrial applications.