BK1/GMA-3-R Equivalent & Substitute Parts

Part Overview

The BK1/GMA-3-R is a 3 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in fuse holders and provides overcurrent protection in electrical circuits. The part maintains active product status with 1621 units in current inventory. Substitute parts are identified when equivalent electrical and mechanical specifications are required for circuit protection applications where the original part is unavailable or when design flexibility permits alternative qualified sources.

Substiute Parts

BK1/GMA-3-R

Eaton - Electronics DivisionIn Stock: 1636BK1/GMA-3-R Datasheet

Current PartRFQ

0235003.HXP

Littelfuse Inc.In Stock: 15010235003.HXP Datasheet

DirectRFQ

0235003.VXP

Littelfuse Inc.In Stock: 8120235003.VXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/GMA-3-R are qualified based on strict equivalence across the following electrical and mechanical parameters:

Substitution Criteria:

• Current Rating: 3 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Breaking Capacity @ Rated Voltage: 100 A (exact match required)
• Mounting Type: Requires Holder (exact match required)

The substitute parts listed below meet all specified electrical and mechanical parameters. Both Littelfuse Inc. parts (0235003.HXP and 0235003.VXP) are direct functional equivalents suitable for replacement in applications requiring the BK1/GMA-3-R specification.

Parameter Comparison

Engineering Selection Recommendations

All three parts listed maintain active product status and ROHS3 compliance. The BK1/GMA-3-R carries CSA, PSE, and UL approvals. Both Littelfuse substitute parts (0235003.HXP and 0235003.VXP) carry expanded approval certifications including CE marking, with 0235003.HXP certified to KC standards and 0235003.VXP certified to K-MARK standards.

The electrical parameters across all three parts are functionally equivalent for 3 A, 250 V AC/DC fast-blow cartridge fuse applications. Minor variations in DC cold resistance (0.039 Ohms for BK1/GMA-3-R versus 0.0347 Ohms for both Littelfuse parts) and melting I²t values (8.8 versus 8.395) fall within acceptable tolerance ranges for cartridge fuse performance in standard circuit protection applications.

Selection between substitute parts should be based on approval agency requirements for the target application, inventory availability, and any specific regional compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can 0235003.HXP and 0235003.VXP be used interchangeably with BK1/GMA-3-R?

A: Both Littelfuse parts meet the electrical and mechanical specifications of the BK1/GMA-3-R. They share identical current rating (3 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), and package dimensions (5mm x 20mm). Selection between them depends on regional certification requirements and application-specific compliance mandates.

Q: What is the significance of the different approval agencies listed?

A: Approval agencies certify that fuses meet specific safety and performance standards for their respective regions. The BK1/GMA-3-R carries CSA, PSE, and UL certifications. The 0235003.HXP adds KC certification, while 0235003.VXP includes K-MARK certification. Applications requiring specific regional compliance should select the part with appropriate certifications for the target market.

Q: Are there differences in thermal performance between these parts?

A: The DC cold resistance and melting I²t values show minor variations. The BK1/GMA-3-R has a DC cold resistance of 0.039 Ohms and melting I²t of 8.8, while both Littelfuse parts have 0.0347 Ohms and 8.395 respectively. These differences are within acceptable tolerance ranges for fast-blow cartridge fuses and do not affect functional equivalence in standard circuit protection applications.

Q: What mounting considerations apply to these fuses?

A: All three parts require a fuse holder for installation. They are not surface-mount or panel-mount components. The 5mm x 20mm package dimensions are standardized across all parts, ensuring mechanical compatibility with standard cartridge fuse holders rated for this size.

Q: Are all parts RoHS compliant?

A: Yes, all three parts (BK1/GMA-3-R, 0235003.HXP, and 0235003.VXP) are ROHS3 compliant and REACH unaffected, meeting environmental and hazardous substance restrictions for electronic components.