Equivalent & Substitute Parts for BK1/GMA-5-R

Part Overview

The BK1/GMA-5-R is a 5 A, 125 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This component is designed for use in fuse holders with 5mm x 20mm dimensions and provides circuit protection in applications requiring fast response characteristics. The part maintains active product status with 1862 units currently in stock. Substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across equivalent electrical and mechanical specifications.

Substiute Parts

BK1/GMA-5-R

Eaton - Electronics DivisionIn Stock: 1893BK1/GMA-5-R Datasheet

Current PartRFQ

0235005.HXP

Littelfuse Inc.In Stock: 200460235005.HXP Datasheet

DirectRFQ

0235005.MXP

Littelfuse Inc.In Stock: 33910235005.MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/GMA-5-R are qualified based on strict equivalence across the following critical parameters:

Electrical Equivalence:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 10 kA (exact match required)

Mechanical Equivalence:

• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)

Compliance Equivalence:

• RoHS3 Compliant status (exact match required)
• Regulatory approvals covering CSA, PSE, and UL standards

The substitute parts 0235005.HXP and 0235005.MXP, both manufactured by Littelfuse Inc., satisfy all critical parameters and are therefore direct functional equivalents for the BK1/GMA-5-R in applications requiring 5 A, 125 V AC/DC fast-blow protection in 5mm x 20mm cartridge form factor.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (BK1/GMA-5-R): The Eaton BK1/GMA-5-R remains the primary specification when original manufacturer continuity is required. This part carries active product status with established supply (1862 units in stock) and holds CSA, PSE, and UL approvals suitable for standard 125 V AC/DC applications.

Substitute Selection (0235005.HXP or 0235005.MXP): The Littelfuse 235 series fuses (0235005.HXP and 0235005.MXP) are direct functional equivalents meeting all critical electrical and mechanical parameters. Both parts carry expanded regulatory approvals (CE, CSA, KC, PSE, UL) and extended operating temperature range (-55°C ~ 125°C). Selection between these two Littelfuse variants depends on procurement availability and inventory requirements (0235005.HXP: 20006 units; 0235005.MXP: 3306 units).

Compliance Basis: All three parts maintain ROHS3 compliance, REACH unaffected status, and identical HTSUS classification (8536.10.0020), supporting regulatory and supply chain standardization.

Frequently Asked Questions (FAQ)

Q: Can 0235005.HXP or 0235005.MXP be used as direct replacements for BK1/GMA-5-R?

A: Yes. Both Littelfuse parts are direct functional equivalents. They match the BK1/GMA-5-R across all critical parameters: 5 A current rating, 125 V AC voltage rating, fast-blow response, 10 kA breaking capacity, and 5mm x 20mm cartridge form factor. All three parts require the same holder type and provide equivalent circuit protection.

Q: What are the differences between 0235005.HXP and 0235005.MXP?

A: Both parts are electrically and mechanically identical. The differences are in inventory availability (0235005.HXP: 20006 units; 0235005.MXP: 3306 units) and potentially in packaging or distribution channels. Selection should be based on procurement lead time and supply chain requirements.

Q: Are there operating temperature differences between the Eaton and Littelfuse parts?

A: The Littelfuse parts (0235005.HXP and 0235005.MXP) specify an operating temperature range of -55°C ~ 125°C, while the Eaton BK1/GMA-5-R does not specify an operating temperature range in the provided data. For applications requiring extended temperature operation, the Littelfuse parts provide documented temperature specifications.

Q: Do all three parts have the same regulatory approvals?

A: The BK1/GMA-5-R carries CSA, PSE, and UL approvals. The Littelfuse parts (0235005.HXP and 0235005.MXP) carry CE, CSA, KC, PSE, and UL approvals. Both sets of approvals support standard 125 V AC/DC circuit protection applications. The Littelfuse parts provide additional CE and KC certifications.

Q: What is the significance of the Melting I²t and DC Cold Resistance differences?

A: The Melting I²t values (Eaton: 29; Littelfuse: 27.41) and DC Cold Resistance values (Eaton: 0.021 Ohms; Littelfuse: 0.0184 Ohms) reflect minor manufacturing variations within the same fast-blow fuse classification. These differences do not affect functional equivalence for standard 5 A, 125 V AC/DC protection applications.

Q: Can these fuses be used without a holder?

A: No. All three parts require a holder for installation. The 5mm x 20mm cartridge form factor is designed for use in compatible fuse holders only. Direct installation without a holder is not supported.

Q: Are all parts RoHS3 compliant?

A: Yes. The BK1/GMA-5-R, 0235005.HXP, and 0235005.MXP are all ROHS3 compliant and REACH unaffected, supporting environmental and regulatory requirements for electronic component procurement.