Equivalent & Substitute Parts for BK/S501-50-R

Part Overview

The BK/S501-50-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 50 mA at 250 V AC/DC with fast-blow response characteristics. This fuse is designed for applications requiring overcurrent protection in a 5mm x 20mm form factor and requires a compatible holder for installation. The part is currently active in production with 1013 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same fuse category, enabling component interchangeability in circuit protection applications.

Substiute Parts

BK/S501-50-R

Eaton - Electronics DivisionIn Stock: 1091BK/S501-50-R Datasheet

Current PartRFQ

BK/GDA-50MA

Eaton - Electronics DivisionIn Stock: 930BK/GDA-50MA Datasheet

Parametric EquivalentRFQ

GDA-50MA

Eaton - Electronics DivisionIn Stock: 1253GDA-50MA Datasheet

Parametric EquivalentRFQ

0216.050MXP

Littelfuse Inc.In Stock: 17830216.050MXP Datasheet

DirectRFQ

0216.050HXP

Littelfuse Inc.In Stock: 8850216.050HXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S501-50-R is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 50 mA
• Voltage Rating (AC): 250 V
• Fuse Type: Cartridge, Ceramic
• Response Time: Fast Blow
• Package / Case: 5mm x 20mm
• Breaking Capacity @ Rated Voltage: 1.5 kA
• Mounting Type: Requires Holder

All identified substitute parts maintain these electrical and mechanical specifications. Variations in secondary parameters such as DC Cold Resistance, Melting I²t values, operating temperature ranges, and approval agency certifications do not disqualify substitution when the primary parameters remain constant. Substitute parts are grouped by manufacturer and series designation while preserving functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

All five fuse part numbers listed maintain identical electrical and mechanical specifications required for direct substitution in 50 mA, 250 V AC/DC ceramic cartridge fuse applications with 5mm x 20mm form factor.

Eaton Series S501 and GDA Options: BK/S501-50-R, BK/GDA-50MA, and GDA-50MA are all manufactured by Eaton - Electronics Division. These parts share common approval agencies including CCC, CSA, IMQ, and SEMKO. The S501 series includes BSI and VDE certifications, while the GDA series includes UR certification. All three maintain active product status and are ROHS compliant.

Littelfuse Series 216 Options: 0216.050MXP and 0216.050HXP are manufactured by Littelfuse Inc. and share identical electrical specifications with the Eaton parts. Both Littelfuse parts include extended operating temperature range (-55°C to 125°C) and certifications from CCC, CE, CSA, SEMKO, UR, and VDE. Both are ROHS3 compliant.

Selection between manufacturers and series should be based on existing supply chain relationships, inventory availability, and specific certification requirements for the target application. All parts are suitable for direct substitution where the 50 mA, 250 V, 5mm x 20mm ceramic cartridge fuse specification is required.

Frequently Asked Questions (FAQ)

Q: Can BK/S501-50-R be replaced with GDA-50MA or 0216.050MXP?

A: Yes. All substitute parts maintain identical current rating (50 mA), voltage rating (250 V AC), fuse type (ceramic cartridge), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (1.5 kA). These are the parameters that determine functional equivalence in ceramic cartridge fuse applications.

Q: What is the difference between BK/GDA-50MA and GDA-50MA?

A: Both parts are manufactured by Eaton in the GDA series with identical electrical and mechanical specifications. The primary difference is the part number prefix: BK/GDA-50MA includes the "BK/" designation while GDA-50MA does not. Both are active products with equivalent functionality.

Q: Are Littelfuse 0216.050MXP and 0216.050HXP interchangeable?

A: Yes. Both Littelfuse parts share identical current rating, voltage rating, fuse type, response time, package dimensions, and breaking capacity. The primary difference is the part number suffix (MXP versus HXP), which does not affect electrical or mechanical compatibility in the application.

Q: Do the Littelfuse parts have different operating temperature ranges than Eaton parts?

A: Yes. Littelfuse 0216.050MXP and 0216.050HXP specify an operating temperature range of -55°C to 125°C. Eaton S501 and GDA series parts do not specify an operating temperature range in the provided data. This difference does not affect substitution eligibility when the application operates within standard environmental conditions.

Q: What certifications are common across all substitute parts?

A: All five parts hold CCC, CSA, and SEMKO certifications. Eaton parts additionally include IMQ certification. Littelfuse parts additionally include CE, UR, and VDE certifications. Eaton S501 includes BSI and VDE. Selection based on specific certification requirements should reference the target application's regulatory standards.

Q: Does DC Cold Resistance affect substitution?

A: DC Cold Resistance is a secondary parameter that does not determine substitution eligibility. BK/S501-50-R and Eaton GDA series parts specify 157.5 Ohms, while Littelfuse 0216.050MXP and 0216.050HXP specify 15.9 Ohms. The difference reflects manufacturing design variations but does not prevent functional substitution when primary electrical parameters (current, voltage, breaking capacity) are matched.

Q: Can these fuses be used without a holder?

A: No. All substitute parts require a compatible fuse holder for installation. The 5mm x 20mm form factor specifies the holder type required. Installation must use a holder rated for ceramic cartridge fuses in this dimension.