Equivalent & Substitute Parts for BK/GDB-40MA

Part Overview

The BK/GDB-40MA is a 40 mA, 250 V AC/DC fast-blow glass cartridge fuse in a 5mm x 20mm package manufactured by Eaton - Electronics Division. This component is classified as Active product status and requires a fuse holder for installation. Alternative equivalent parts are necessary to support supply chain flexibility, inventory management, and regional availability across multiple manufacturers while maintaining identical electrical and mechanical specifications.

Substiute Parts

BK/GDB-40MA

Eaton - Electronics DivisionIn Stock: 1152BK/GDB-40MA Datasheet

Current PartRFQ

BK/S500-40-R

Eaton - Electronics DivisionIn Stock: 811BK/S500-40-R Datasheet

DirectRFQ

0034.1528

SCHURTER Inc.In Stock: 37080034.1528 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GDB-40MA is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 40 mA (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: 35A (exact match required)
• Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these mandatory parameters without deviation. Substitution is valid only when all electrical and mechanical specifications align precisely with the main part number.

Parameter Comparison

Engineering Selection Recommendations

BK/S500-40-R (Eaton - Electronics Division): This substitute maintains identical electrical and mechanical specifications to the BK/GDB-40MA. Both components are manufactured by Eaton and carry Active product status. The BK/S500-40-R is ROHS3 Compliant with MSL rating of 1 (Unlimited) and REACH Unaffected status. Current inventory availability is 796 pieces. Selection of this part is appropriate for direct substitution in applications where Eaton components are specified.

0034.1528 (SCHURTER Inc.): This substitute meets all mandatory electrical and mechanical parameters. The 0034.1528 is manufactured by SCHURTER Inc. and carries Active product status. It provides additional certifications including CCC, cURus, and VDE approvals, with documented operating temperature range of -55°C to 125°C. ROHS3 Compliant and REACH Unaffected. Current inventory availability is 3622 pieces. Selection of this part is appropriate for applications requiring multi-source qualification or where SCHURTER components are preferred.

Both substitute parts are electrically and mechanically interchangeable with the BK/GDB-40MA based on provided specifications.

Frequently Asked Questions (FAQ)

Q: What determines if a fuse can substitute for the BK/GDB-40MA? A: Substitution requires exact matching of current rating (40 mA), voltage rating (250 V AC), fuse type (Cartridge, Glass), response time (Fast Blow), package dimensions (5mm x 20mm), breaking capacity (35A), and mounting type (Requires Holder). All listed substitutes meet these criteria.

Q: Are the BK/S500-40-R and 0034.1528 physically interchangeable? A: Yes. Both substitute parts have identical package dimensions of 5mm x 20mm and require the same fuse holder type as the BK/GDB-40MA.

Q: What is the difference in melting I²t between the main part and substitutes? A: The BK/GDB-40MA and BK/S500-40-R both have melting I²t of 0.00011. The 0034.1528 has a melting I²t of 0.000128, which is slightly higher but remains within acceptable equivalence for this component category.

Q: Which substitute has the broadest certifications? A: The 0034.1528 (SCHURTER) includes CCC, cURus, and VDE approvals with a specified operating temperature range of -55°C to 125°C, providing additional regulatory coverage compared to the other options.

Q: Can I mix these fuses in the same application? A: Yes, provided the application circuit design accommodates any of these equivalent parts. All three fuses are electrically and mechanically equivalent based on the provided specifications.

Q: What is the inventory status for each part? A: BK/GDB-40MA: 1141 pieces; BK/S500-40-R: 796 pieces; 0034.1528: 3622 pieces.