GSA 100-R Equivalent & Substitute Parts

Part Overview

The GSA 100-R is a 100 mA, 250 V AC/DC ceramic cartridge fuse manufactured by Bel Fuse Inc. in the 3AB/3AG form factor (1/4" x 1-1/4"). This component is classified as obsolete, making identification of functionally equivalent alternatives essential for system maintenance, repair, and redesign applications. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility to ensure direct interchangeability without circuit modification.

Substiute Parts

GSA 100-R

Bel Fuse Inc.In Stock: 803GSA 100-R Datasheet

Current PartRFQ

0326.100MXP

Littelfuse Inc.In Stock: 7800326.100MXP Datasheet

DirectRFQ

0326.100HXP

Littelfuse Inc.In Stock: 11630326.100HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the GSA 100-R is determined by strict equivalence across the following parameters:

• Current Rating: 100 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" (exact match required for holder compatibility)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum required)

The substitute parts listed below meet all mandatory electrical and mechanical criteria for direct replacement in applications originally designed for the GSA 100-R.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse 326 series parts (0326.100MXP and 0326.100HXP) are direct functional equivalents to the obsolete GSA 100-R. Selection between these two active alternatives should be based on:

Product Availability: Both parts are in active production status with current inventory. The 0326.100HXP variant has higher stock availability (1109 Pcs) compared to 0326.100MXP (709 Pcs).

Regulatory Compliance: The GSA 100-R carries CE, CSA, and cULus certifications. Both Littelfuse substitutes carry CE certification. Applications requiring CSA or cULus compliance should verify certification status with the equipment manufacturer or Littelfuse technical documentation.

Mechanical Compatibility: Both substitute parts maintain identical package dimensions (0.250" Dia x 1.250" L / 6.35mm x 31.75mm) and are compatible with 3AB/3AG holders. The GSA 100-R dimension of 1.252" L is within tolerance of the substitute specification of 1.250" L for standard holder applications.

Electrical Performance: All three parts meet the core electrical requirements. Differences in Breaking Capacity (GSA 100-R: 35A vs. Littelfuse: 100A) and Melting I²t values do not affect substitution eligibility, as these parameters remain within acceptable ranges for the 100 mA, 250 V application class.

Frequently Asked Questions (FAQ)

Q: Can 0326.100MXP and 0326.100HXP be used interchangeably?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters: 100 mA current rating, 250 V AC voltage rating, slow-blow response, ceramic cartridge construction, and 3AB/3AG package compatibility. Selection may be based on availability or packaging preference.

Q: Will these substitutes fit existing GSA 100-R holders?

A: Yes. Both Littelfuse parts are specified for 3AB/3AG holders with 1/4" x 1-1/4" form factor. The dimensional tolerance between GSA 100-R (1.252" L) and Littelfuse substitutes (1.250" L) is within standard holder specifications and does not affect mechanical fit or electrical contact.

Q: Are there any compliance differences between the main part and substitutes?

A: The GSA 100-R carries CE, CSA, and cULus certifications. The Littelfuse 326 series substitutes carry CE certification. Applications in markets or equipment requiring CSA or cULus compliance should confirm substitute certification status with the system manufacturer or Littelfuse technical support.

Q: What is the difference between 0326.100MXP and 0326.100HXP?

A: Both parts are functionally equivalent. The designation difference (MXP vs. HXP) reflects internal Littelfuse product line categorization but does not affect electrical performance, mechanical compatibility, or substitution suitability for the GSA 100-R application.

Q: Can these parts be used in new designs or only as replacements?

A: These parts are suitable for both replacement applications and new designs. The Littelfuse 326 series parts are in active production status, ensuring long-term availability and supply chain stability compared to the obsolete GSA 100-R.