Equivalent & Substitute Parts for GMA-3.5-R

Part Overview

The GMA-3.5-R is a 3.5 A, 125 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in 5mm x 20mm fuse holders and provides circuit protection in applications requiring fast response characteristics. The part maintains Active product status with 905 units currently in stock. Substitute parts are identified to address inventory availability, extended voltage ratings, or alternative sourcing requirements while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

GMA-3.5-R

Eaton - Electronics DivisionIn Stock: 931GMA-3.5-R Datasheet

Current PartRFQ

BK/GMA-3.5-R

Eaton - Electronics DivisionIn Stock: 1388BK/GMA-3.5-R Datasheet

DirectRFQ

023503.5MXP

Littelfuse Inc.In Stock: 3383023503.5MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMA-3.5-R are identified based on strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 3.5 A (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Allowable Variation Parameters:

• Voltage Rating - AC: Equal to or greater than 125 V
• Breaking Capacity: Equal to or greater than 10 kA
• Melting I²t: Within acceptable range for 3.5 A fast-blow cartridge fuses
• DC Cold Resistance: Minor variations acceptable within component tolerance
• Manufacturer: Different manufacturers permitted if all electrical and mechanical parameters align

Substitutes Identified:

1. BK/GMA-3.5-R (Eaton - Electronics Division): Direct equivalent with identical electrical specifications. Differs only in RoHS compliance level (ROHS3 vs. RoHS Compliant) and includes REACH Unaffected status.

2. 023503.5MXP (Littelfuse Inc.): Functionally compatible substitute with higher voltage rating (250 V AC vs. 125 V AC), higher breaking capacity (100 A vs. 10 kA), and extended operating temperature range (-55°C ~ 125°C). All mandatory parameters match; voltage and breaking capacity exceed minimum requirements.

Parameter Comparison

Engineering Selection Recommendations

BK/GMA-3.5-R Selection Criteria:

The BK/GMA-3.5-R is a direct electrical and mechanical equivalent to the GMA-3.5-R. Both parts share identical current rating, voltage rating, response time, package dimensions, and breaking capacity. The primary distinction is enhanced RoHS compliance (ROHS3 vs. RoHS Compliant) and REACH Unaffected status on the BK variant. This substitute is appropriate for applications where inventory availability is a consideration, as 1345 units are in stock compared to 905 units of the primary part. Both parts carry CSA, PSE, and UL certifications, ensuring regulatory compliance across equivalent standards.

023503.5MXP Selection Criteria:

The 023503.5MXP from Littelfuse Inc. is a functionally compatible substitute with enhanced electrical specifications. The 250 V AC voltage rating exceeds the 125 V requirement of the GMA-3.5-R, permitting use in applications with higher voltage margins. The 100 A breaking capacity substantially exceeds the 10 kA specification, providing enhanced fault current handling. The extended operating temperature range (-55°C ~ 125°C) accommodates wider environmental conditions. This substitute is suitable for applications requiring higher voltage ratings or enhanced thermal performance. Regulatory certifications include CE, PSE, and UL. Inventory availability is highest at 3292 units. The slightly elevated melting I²t (17.14 vs. 13) and DC cold resistance (0.0331 vs. 0.03 Ohms) remain within acceptable tolerance for 3.5 A fast-blow cartridge fuse applications.

Frequently Asked Questions (FAQ)

Q: Can BK/GMA-3.5-R be used as a direct replacement for GMA-3.5-R?

A: Yes. The BK/GMA-3.5-R is a direct equivalent with identical electrical and mechanical specifications. Both parts are manufactured by Eaton - Electronics Division and share the same current rating (3.5 A), voltage rating (125 V AC), response time (Fast Blow), package dimensions (5mm x 20mm), and breaking capacity (10 kA). The BK variant includes enhanced RoHS3 compliance and REACH Unaffected status.

Q: Is 023503.5MXP compatible with applications designed for GMA-3.5-R?

A: The 023503.5MXP is mechanically and electrically compatible for applications requiring 3.5 A fast-blow protection in 5mm x 20mm holders. The higher voltage rating (250 V AC vs. 125 V AC) and breaking capacity (100 A vs. 10 kA) provide enhanced performance margins. Compatibility depends on the specific application voltage and fault current requirements. If the application is designed for 125 V AC operation, the 250 V AC rating of the 023503.5MXP does not create incompatibility; higher voltage-rated fuses operate correctly in lower-voltage circuits.

Q: What are the physical compatibility requirements for these substitutes?

A: All three parts share identical package dimensions (5mm x 20mm) and require the same fuse holder type. Physical installation is interchangeable across all three parts without modification to mounting hardware or holder equipment.

Q: How do the electrical characteristics differ between these substitutes?

A: Current rating and response time are identical across all three parts (3.5 A, Fast Blow). The GMA-3.5-R and BK/GMA-3.5-R share identical voltage rating (125 V AC) and breaking capacity (10 kA). The 023503.5MXP provides higher voltage rating (250 V AC) and breaking capacity (100 A), with a slightly elevated melting I²t (17.14 vs. 13) and DC cold resistance (0.0331 vs. 0.03 Ohms).

Q: What regulatory certifications apply to each substitute?

A: GMA-3.5-R and BK/GMA-3.5-R carry CSA, PSE, and UL certifications. The 023503.5MXP carries CE, PSE, and UL certifications. All parts meet applicable safety and performance standards for their respective markets.

Q: Are there inventory considerations for selecting a substitute?

A: Current inventory levels are: GMA-3.5-R (905 units), BK/GMA-3.5-R (1345 units), and 023503.5MXP (3292 units). If inventory availability is a selection factor, the 023503.5MXP offers the highest stock level.

Q: Can these fuses be used in DC applications?

A: All three parts are rated for both AC and DC operation at their specified voltage ratings. The GMA-3.5-R and BK/GMA-3.5-R are rated 125 V AC/DC. The 023503.5MXP is rated 250 V AC/DC. DC cold resistance values are provided for each part (0.03 Ohms for GMA-3.5-R and BK/GMA-3.5-R; 0.0331 Ohms for 023503.5MXP).