BK/GDB-100MA Equivalent & Substitute Parts

Part Overview

The BK/GDB-100MA is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm form factor manufactured by Eaton - Electronics Division. This fuse requires a compatible holder for installation and is classified as Active product status. Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory availability, manufacturer preference, or specific compliance certifications.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution of the BK/GDB-100MA is determined by strict equivalence across the following parameters: current rating (100 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), and physical package dimensions (5mm x 20mm). All substitute parts listed maintain these core electrical and mechanical specifications. Breaking capacity, DC cold resistance, melting I²t, and approval agency certifications are provided for reference but do not restrict substitution eligibility when the primary parameters are matched. Substitute parts are sourced from Eaton - Electronics Division, Littelfuse Inc., SCHURTER Inc., and OptiFuse.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (Amps)	Voltage Rating (AC)	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	RoHS Status	Product Status
BK/GDB-100MA	Eaton - Electronics Division	GDB	100 mA	250 V	Fast Blow	5mm x 20mm	35A	RoHS Compliant	Active
BK/S500-100-R	Eaton - Electronics Division	S500	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
BK/GMA-100-R	Eaton - Electronics Division	GMA	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
BK1/S500-100-R	Eaton - Electronics Division	S500	100 mA	250 V	Fast Blow	5mm x 20mm	35A	RoHS Compliant	Active
0217.100HXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
0217.100MXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
0034.1506	SCHURTER Inc.	FSF 5x20	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
0235.100HXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
0235.100MXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5mm x 20mm	35A	ROHS3 Compliant	Active
FSC-100MA	OptiFuse	FSC	100 mA	250 V	Fast Blow	5mm x 20mm	100A	ROHS3 Compliant	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and are RoHS compliant. Selection among equivalent parts is based on manufacturer availability and specific compliance certifications required by the application.

Eaton - Electronics Division parts (BK/S500-100-R, BK/GMA-100-R, BK1/S500-100-R) provide direct manufacturer continuity and are suitable for applications requiring Eaton-sourced components.

Littelfuse Inc. parts (0217.100HXP, 0217.100MXP, 0235.100HXP, 0235.100MXP) carry expanded approval agency certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE, with operating temperature range of -55°C to 125°C.

SCHURTER Inc. part (0034.1506) carries CCC, cURus, and VDE certifications with operating temperature range of -55°C to 125°C.

OptiFuse part (FSC-100MA) carries cULus and UL 248 certifications with operating temperature range of -55°C to 90°C and higher breaking capacity of 100A at rated voltage.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the BK/GDB-100MA?

A: A substitute part must match the following parameters: 100 mA current rating, 250 V AC voltage rating, fast-blow response time, cartridge glass fuse type, and 5mm x 20mm physical dimensions. All listed parts meet these criteria.

Q: Are all substitute parts physically compatible with the same holder?

A: Yes. All substitute parts share the identical 5mm x 20mm package dimensions and require the same holder type as the BK/GDB-100MA.

Q: What is the difference between the Eaton GDB and GMA series?

A: Both series maintain identical electrical ratings and physical dimensions. The GMA series carries additional approval agency certifications (CSA, PSE, UL) and has different DC cold resistance (7.84 Ohms versus 3.8 Ohms) and melting I²t values (0.0001 versus 0.003).

Q: Can I use the OptiFuse FSC-100MA as a direct replacement?

A: Yes. The FSC-100MA meets all core electrical and mechanical parameters. It features a higher breaking capacity of 100A and operates across -55°C to 90°C temperature range.

Q: What approval agencies are represented across the substitute parts?

A: Littelfuse parts carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications. SCHURTER carries CCC, cURus, and VDE. OptiFuse carries cULus and UL 248. Eaton GMA carries CSA, PSE, and UL.

Q: Are there inventory differences among the substitute parts?

A: Yes. Inventory levels vary by part number and manufacturer. Littelfuse 0217.100MXP has the highest inventory at 5500 pieces, while SCHURTER 0034.1506 has 888 pieces available.

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