GDA-1.25A Ceramic Fuse Equivalent & Substitute Parts

Part Overview

The GDA-1.25A is an active-status ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 1.25 A at 250 V AC/DC with fast-blow response characteristics. This 5mm x 20mm form factor fuse requires a dedicated holder for installation and is designed for circuit protection applications requiring reliable overcurrent interruption at 1.5 kA breaking capacity.

Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or manufacturer preference while maintaining identical electrical and mechanical performance parameters.

Substiute Parts

GDA-1.25A

Eaton - Electronics DivisionIn Stock: 1015GDA-1.25A Datasheet

Current PartRFQ

BK/S501-1.25-R

Eaton - Electronics DivisionIn Stock: 930BK/S501-1.25-R Datasheet

Parametric EquivalentRFQ

0001.1005

SCHURTER Inc.In Stock: 19240001.1005 Datasheet

Parametric EquivalentRFQ

02161.25HXP

Littelfuse Inc.In Stock: 854402161.25HXP Datasheet

Parametric EquivalentRFQ

02161.25MXP

Littelfuse Inc.In Stock: 199002161.25MXP Datasheet

Parametric EquivalentRFQ

FCD-1.25A

OptiFuseIn Stock: 3360FCD-1.25A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

All identified substitute parts maintain identical performance across the following critical parameters:

• Current Rating: 1.25 A
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Package / Case: 5mm x 20mm
• Response Time: Fast Blow
• Breaking Capacity @ Rated Voltage: 1.5 kA
• Mounting Type: Requires Holder

Substitution is valid when these parameters remain constant across all candidate parts. Secondary parameters including melting I²t, DC cold resistance, operating temperature range, and approval agency certifications may vary within acceptable engineering tolerances but do not prevent functional equivalence for standard circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and are suitable for direct replacement in applications requiring 1.25 A ceramic cartridge fuses at 250 V AC with 5mm x 20mm form factor.

Eaton - Electronics Division (GDA-1.25A and BK/S501-1.25-R): Both parts are manufactured by the same supplier. BK/S501-1.25-R carries expanded approval certifications including cULus and MITI/JET, with ROHS3 compliance and REACH unaffected status explicitly documented.

SCHURTER Inc. (0001.1005): Offers highest inventory availability at 1851 pieces. Carries CCC, cURus, KC, and VDE certifications. Specifies operating temperature range of -55°C to 125°C. ROHS3 compliant with REACH unaffected status.

Littelfuse Inc. (02161.25HXP and 02161.25MXP): Both parts from the 216 series provide the broadest approval agency coverage including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. Operating temperature range specified as -55°C to 125°C. ROHS3 compliant with REACH unaffected status. 02161.25HXP offers highest inventory at 8481 pieces.

OptiFuse (FCD-1.25A): Carries IEC 60127 approval. Specifies 250 V DC voltage rating in addition to 250 V AC. Operating temperature range -55°C to 125°C. ROHS3 compliant with REACH unaffected status. Inventory of 3306 pieces available.

Selection among these parts should be based on supply availability, required approval certifications for the target application, and established supplier relationships.

Frequently Asked Questions (FAQ)

Q: Can GDA-1.25A be replaced with any of the listed substitute parts?

A: Yes. All listed parts maintain identical current rating (1.25 A), voltage rating (250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response time (fast blow), and breaking capacity (1.5 kA). Physical and electrical compatibility is confirmed.

Q: What is the significance of melting I²t variation among substitute parts?

A: Melting I²t values range from 0.313 to 0.538 across the listed parts. This parameter describes the thermal energy required to melt the fuse element. Variations within this range do not prevent functional substitution for standard circuit protection applications, as all parts maintain the same current rating and response time classification.

Q: Do all substitute parts require the same holder as GDA-1.25A?

A: Yes. All parts are ceramic cartridge fuses with 5mm x 20mm form factor and require a dedicated fuse holder. Mechanical compatibility is confirmed across all listed substitutes.

Q: Which substitute part has the best approval agency coverage?

A: Littelfuse 02161.25HXP and 02161.25MXP both carry the broadest certification portfolio including CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE. Selection should align with specific application requirements and regional compliance mandates.

Q: Are there DC voltage rating differences among the substitute parts?

A: GDA-1.25A, BK/S501-1.25-R, 0001.1005, 02161.25HXP, and 02161.25MXP do not specify DC voltage ratings in the provided data. FCD-1.25A explicitly specifies 250 V DC rating. For applications requiring DC circuit protection, FCD-1.25A provides documented DC performance.

Q: What is the operating temperature range for each substitute?

A: GDA-1.25A and BK/S501-1.25-R do not specify operating temperature ranges. SCHURTER 0001.1005, Littelfuse 02161.25HXP and 02161.25MXP, and OptiFuse FCD-1.25A all specify -55°C to 125°C operating range. For applications with temperature extremes, these parts provide documented thermal performance.