GSA 1.25-R Equivalent & Substitute Parts

Part Overview

The GSA 1.25-R is a 1.25 A ceramic cartridge fuse rated for 250 V AC/DC operation, manufactured by Bel Fuse Inc. This slow-blow fuse is designed for applications requiring holder-based mounting in 3AB and 3AG configurations with 1/4" x 1-1/4" dimensions. The part maintains active product status with 974 units in current inventory. Equivalent substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across compatible applications.

Substiute Parts

GSA 1.25-R

Bel Fuse Inc.In Stock: 1014GSA 1.25-R Datasheet

Current PartRFQ

TCA-1.25A

OptiFuseIn Stock: 2297TCA-1.25A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the GSA 1.25-R with the TCA-1.25A is based on electrical and mechanical parameter equivalence. Both parts share identical specifications across all critical selection criteria: 1.25 A current rating, 250 V AC voltage rating, ceramic cartridge construction, slow-blow response characteristic, 100 A breaking capacity, 3AB/3AG package configuration, and 0.250" Dia x 1.252" L physical dimensions. Operating temperature range (-55°C ~ 125°C) and mounting requirements (holder-based) are identical. These parameters establish functional interchangeability within applications designed for either manufacturer's part number.

Parameter Comparison

Engineering Selection Recommendations

Both GSA 1.25-R and TCA-1.25A maintain active product status with full regulatory compliance. The GSA 1.25-R carries CE, CSA, cULus, and PSE approvals. The TCA-1.25A carries cULus and UL 248 certifications. Both parts are ROHS3 compliant and classified under EAR99 export control. Selection between these parts should be based on design documentation requirements, existing supply chain relationships, and specific certification mandates for the target application. Inventory availability (974 units for GSA 1.25-R; 2239 units for TCA-1.25A) may influence procurement decisions for high-volume production.

Frequently Asked Questions (FAQ)

Q: Can TCA-1.25A replace GSA 1.25-R in existing designs? A: Yes. Both parts are electrically and mechanically equivalent with identical current ratings (1.25 A), voltage ratings (250 V AC), ceramic cartridge construction, slow-blow response, breaking capacity (100 A), and physical dimensions (0.250" Dia x 1.252" L). Both require 3AB/3AG holder-based mounting.

Q: Are there differences in regulatory approvals between these parts? A: GSA 1.25-R carries CE, CSA, cULus, and PSE approvals. TCA-1.25A carries cULus and UL 248 certifications. Design specifications should confirm which approvals are required for the target application.

Q: Do these fuses have different temperature operating ranges? A: No. Both parts operate across the identical temperature range of -55°C to 125°C.

Q: What is the physical package compatibility? A: Both parts use 3AB and 3AG package configurations with identical dimensions of 0.250" diameter by 1.252" length (6.35mm x 31.80mm). Both require holder-based mounting and are not surface-mount components.

Q: Are both parts RoHS compliant? A: Yes. Both GSA 1.25-R and TCA-1.25A are ROHS3 compliant.