BK/GDB-12A Equivalent & Substitute Parts

Part Overview

The BK/GDB-12A is a 12 A, 250 V AC/DC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division in a 5mm x 20mm package format. This component requires a fuse holder for installation and is classified as obsolete. Due to its obsolete product status, equivalent substitute parts from active manufacturers are necessary to maintain circuit protection functionality in applications requiring this electrical specification.

Substiute Parts

BK/GDB-12A

Eaton - Electronics DivisionIn Stock: 873BK/GDB-12A Datasheet

Current PartRFQ

FSD-12A

OptiFuseIn Stock: 6264FSD-12A Datasheet

DirectRFQ

FSC-12A

OptiFuseIn Stock: 837FSC-12A Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/GDB-12A are qualified based on strict electrical and mechanical parameter matching:

Qualifying Parameters for Substitution:

• Current Rating: 12 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)
• Mounting Type: Requires Holder (exact match required)

Both substitute parts (FSD-12A and FSC-12A) from OptiFuse meet all qualifying parameters. These parts are active products with current manufacturing status, ensuring availability and supply chain continuity.

Parameter Comparison

Engineering Selection Recommendations

FSD-12A (OptiFuse) is the direct manufacturer equivalent substitute. This part carries IEC 60127 approval and operates across a wide temperature range (-55°C ~ 125°C). It is actively manufactured and stocked, providing reliable supply availability. The FSD-12A is suitable for applications requiring IEC 60127 compliance.

FSC-12A (OptiFuse) is the parametric equivalent substitute. This part carries UL 248 approval and operates across -55°C ~ 90°C. It is actively manufactured and stocked. The FSC-12A is suitable for applications requiring UL 248 compliance. The higher breaking capacity (100 A) provides additional margin in high-fault-current environments compared to the FSD-12A.

Both substitute parts are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. Selection between FSD-12A and FSC-12A depends on the specific approval agency requirement of the end application (IEC 60127 versus UL 248) and operating temperature range constraints.

Frequently Asked Questions (FAQ)

Q: Can FSD-12A and FSC-12A be used interchangeably with BK/GDB-12A?

A: Both FSD-12A and FSC-12A meet the core electrical and mechanical specifications of the BK/GDB-12A (12 A, 250 V AC, fast-blow, 5mm x 20mm cartridge glass fuse). Physical compatibility with existing fuse holders is confirmed. Selection between them depends on the approval agency requirement of your application.

Q: What is the difference between FSD-12A and FSC-12A?

A: Both parts are electrically and mechanically equivalent. The primary differences are: FSD-12A carries IEC 60127 approval with 35 A breaking capacity and operates to 125°C; FSC-12A carries UL 248 approval with 100 A breaking capacity and operates to 90°C. Choose based on your application's approval standard and temperature requirements.

Q: Are the substitute parts physically compatible with existing BK/GDB-12A fuse holders?

A: Yes. Both FSD-12A and FSC-12A share the identical 5mm x 20mm package dimensions (0.205" Dia x 0.787" L) and require the same holder type as the BK/GDB-12A.

Q: What certifications do the substitute parts carry?

A: FSD-12A carries IEC 60127 certification. FSC-12A carries UL 248 certification. Both are ROHS3 compliant and REACH unaffected.

Q: Why is the BK/GDB-12A listed as obsolete?

A: The BK/GDB-12A is no longer in active production by Eaton. Substitute parts from OptiFuse (FSD-12A and FSC-12A) provide equivalent functionality with active manufacturing status and current availability.