Equivalent & Substitute Parts for BK/GDB-50MA

Part Overview

The BK/GDB-50MA is a 50 mA fast-blow glass cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm package form factor. This component is manufactured by Eaton - Electronics Division and is currently in active product status with 1076 pieces available in inventory. Glass cartridge fuses of this specification are essential protective devices in electronic circuits requiring fast response to overcurrent conditions. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in holder-based fuse applications.

Substiute Parts

BK/GDB-50MA

Eaton - Electronics DivisionIn Stock: 1184BK/GDB-50MA Datasheet

Current PartRFQ

BK/S500-50-R

Eaton - Electronics DivisionIn Stock: 710BK/S500-50-R Datasheet

DirectRFQ

0034.1529

SCHURTER Inc.In Stock: 7670034.1529 Datasheet

DirectRFQ

0217.050HXP

LittelfuseIn Stock: 31790217.050HXP Datasheet

DirectRFQ

0217.050MXP

Littelfuse Inc.In Stock: 23570217.050MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GDB-50MA is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Current Rating: 50 mA (exact match)
• Voltage Rating (AC): 250 V (exact match)
• Response Time: Fast Blow (exact match)
• Breaking Capacity @ Rated Voltage: 35 A (exact match)

Mechanical Equivalence Requirements:

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

All four substitute parts identified (BK/S500-50-R, 0034.1529, 0217.050HXP, and 0217.050MXP) meet these mandatory criteria. Secondary parameters including melting I²t, DC cold resistance, operating temperature range, and approval certifications are provided for engineering reference but do not restrict substitution eligibility when primary parameters align.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are functionally equivalent to the BK/GDB-50MA based on matching electrical and mechanical specifications. Selection among these alternatives may be based on the following factors:

Manufacturer Continuity: BK/S500-50-R maintains supply from the same manufacturer (Eaton - Electronics Division) as the primary part, offering supply chain consistency.

Certification Coverage: The Littelfuse parts (0217.050HXP and 0217.050MXP) carry broader approval agency certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE, compared to the SCHURTER part (0034.1529) which includes CCC, cURus, and VDE certifications. The Eaton GDB series carries no specified approval agencies.

Inventory Availability: Littelfuse 0217.050HXP has the highest inventory level at 3075 pieces, followed by 0217.050MXP at 2300 pieces, BK/S500-50-R at 691 pieces, and SCHURTER 0034.1529 at 689 pieces.

Operating Temperature Range: SCHURTER (0034.1529) and both Littelfuse parts (0217.050HXP, 0217.050MXP) specify operating temperature range of -55°C to 125°C. The Eaton GDB series does not specify operating temperature limits.

All parts are RoHS compliant and carry the same ECCN (EAR99) and HTSUS (8536.10.0020) classifications.

Frequently Asked Questions (FAQ)

Q: Can BK/GDB-50MA be directly replaced with BK/S500-50-R?

A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical ratings (50 mA, 250 V AC), response time (Fast Blow), breaking capacity (35 A), and mechanical dimensions (5mm x 20mm). Both require a fuse holder for installation.

Q: What is the difference between the Littelfuse 0217.050HXP and 0217.050MXP?

A: Both Littelfuse parts are electrically and mechanically identical with 50 mA current rating, 250 V AC voltage rating, Fast Blow response, 35 A breaking capacity, and 5mm x 20mm package dimensions. They differ only in inventory availability and internal part designation within the Littelfuse 217 series.

Q: Are there differences in melting I²t values among the substitutes?

A: Yes. The BK/GDB-50MA and BK/S500-50-R specify 0.0002 melting I²t, SCHURTER 0034.1529 specifies 0.00025, and both Littelfuse parts specify 0.00019. These variations are within the tolerance band for 50 mA fast-blow fuses and do not affect substitution eligibility when all primary electrical and mechanical parameters match.

Q: Which substitute has the broadest certification coverage?

A: Both Littelfuse parts (0217.050HXP and 0217.050MXP) carry the most comprehensive approval agency certifications: CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. The SCHURTER part includes CCC, cURus, and VDE. The Eaton GDB series specifies no approval agencies.

Q: Do all substitutes require the same holder type?

A: Yes. All parts are cartridge-type glass fuses in the 5mm x 20mm package form factor and require a compatible fuse holder for installation. Holder compatibility is determined by the 5mm x 20mm mechanical specification, which is identical across all parts.

Q: What is the DC cold resistance specification used for?

A: DC cold resistance is a measured parameter indicating the electrical resistance of the fuse element at room temperature before operation. The BK/GDB-50MA and BK/S500-50-R specify 17 Ohms, while the Littelfuse parts specify 15.2 Ohms. This parameter does not affect substitution eligibility but may be relevant for circuit analysis in applications with very low voltage drops.