GDB-100MA Equivalent & Substitute Parts Reference

Part Overview

The GDB-100MA is a 100 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm package format manufactured by Eaton - Electronics Division. This component requires a fuse holder for installation and is classified as Active product status. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional characteristics to ensure direct interchangeability in circuit protection applications.

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
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitute parts for the GDB-100MA are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

Current Rating: 100 mA (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Response Time: Fast Blow (exact match required)

Mechanical Equivalence Criteria:

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

Functional Equivalence Criteria:

Breaking Capacity @ Rated Voltage: 35A minimum

All substitute parts listed meet these criteria and are therefore directly interchangeable with the GDB-100MA in applications requiring 100 mA, 250 V AC/DC circuit protection in standard 5x20mm cartridge format.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (Amps)	Voltage Rating - AC	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	Inventory (Pcs)
GDB-100MA	Eaton - Electronics Division	GDB	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.003	3.8	Active	851
BK/GMA-100-R	Eaton - Electronics Division	GMA	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0001	7.84	Active	1321
BK/S500-100-R	Eaton - Electronics Division	S500	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.003	3.8	Active	1043
BK1/S500-100-R	Eaton - Electronics Division	S500	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.003	3.8	Active	1825
0034.1506	SCHURTER Inc.	FSF 5x20	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0014	—	Active	888
0217.100HXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0045	5.6965	Active	3017
0217.100MXP	Littelfuse Inc.	217	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.0045	5.6965	Active	5500
0235.100HXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.00312	8.4	Active	999
0235.100MXP	Littelfuse Inc.	235	100 mA	250 V	Fast Blow	5mm x 20mm	35A	0.00312	8.4	Active	1475
FSC-100MA	OptiFuse	FSC	100 mA	250 V	Fast Blow	5mm x 20mm	100A	—	—	Active	2381

Engineering Selection Recommendations

All substitute parts listed are Active status products from established manufacturers. Selection among equivalent parts may be based on the following factors derived from provided data:

Eaton - Electronics Division Parts (GDB-100MA, BK/GMA-100-R, BK/S500-100-R, BK1/S500-100-R): These parts maintain consistent electrical and mechanical specifications. BK/GMA-100-R includes CSA, PSE, and UL certifications. BK/S500-100-R and BK1/S500-100-R are RoHS3 compliant. Inventory availability ranges from 1043 to 1825 units.

SCHURTER Inc. Part (0034.1506): FSF 5x20 series with CCC, cURus, and VDE approvals. Operating temperature range specified as -55°C to 125°C. RoHS3 compliant. Inventory: 888 units.

Littelfuse Inc. Parts (0217.100HXP, 0217.100MXP, 0235.100HXP, 0235.100MXP): Series 217 and 235 cartridge fuses with comprehensive certifications including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Operating temperature range -55°C to 125°C. RoHS3 compliant. Highest inventory availability: 0217.100MXP with 5500 units.

OptiFuse Part (FSC-100MA): FSC series with cULus and UL 248 certifications. Breaking capacity rated at 100A (exceeds 35A minimum). Operating temperature range -55°C to 90°C. RoHS3 compliant. Inventory: 2381 units.

Frequently Asked Questions (FAQ)

Q: What makes a fuse an equivalent substitute for the GDB-100MA?

A: A substitute fuse must match all critical parameters: 100 mA current rating, 250 V AC voltage rating, fast-blow response time, 5mm x 20mm cartridge package, and glass cartridge type requiring a holder. Breaking capacity must meet or exceed 35A at rated voltage.

Q: Can I use FSC-100MA as a direct replacement for GDB-100MA?

A: Yes. FSC-100MA meets all electrical and mechanical equivalence criteria. It provides 100A breaking capacity, which exceeds the 35A requirement of GDB-100MA, offering additional margin in circuit protection capability.

Q: What is the difference between Littelfuse 0217.100HXP and 0217.100MXP?

A: Both parts are electrically and mechanically identical with matching current ratings, voltage ratings, response times, and package dimensions. The primary difference is inventory availability: 0217.100MXP has 5500 units in stock compared to 3017 units for 0217.100HXP.

Q: Are there temperature operating range differences among substitutes?

A: Yes. GDB-100MA and BK/GMA-100-R do not specify operating temperature ranges. SCHURTER 0034.1506, Littelfuse parts (0217 and 235 series), and OptiFuse FSC-100MA specify -55°C to 125°C. OptiFuse FSC-100MA specifies -55°C to 90°C. Applications requiring extended temperature operation should reference these specifications.

Q: Do all substitute parts have RoHS compliance?

A: Most substitute parts are RoHS3 compliant. GDB-100MA does not specify RoHS status. BK/GMA-100-R, BK/S500-100-R, BK1/S500-100-R, SCHURTER 0034.1506, all Littelfuse parts, and OptiFuse FSC-100MA are RoHS3 compliant.

Q: What certifications should I consider for my application?

A: Certification requirements depend on end-use application. Littelfuse 0217 and 235 series parts carry the broadest certification portfolio including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. OptiFuse FSC-100MA carries cULus and UL 248 certifications. SCHURTER 0034.1506 carries CCC, cURus, and VDE certifications. Eaton parts carry varying certifications; BK/GMA-100-R includes CSA, PSE, and UL.

Q: Is there a difference in melting I²t values among substitutes?

A: Yes. Melting I²t values vary: GDB-100MA and BK/S500-100-R both have 0.003; BK/GMA-100-R has 0.0001; SCHURTER 0034.1506 has 0.0014; Littelfuse 0217 series has 0.0045; Littelfuse 235 series has 0.00312; OptiFuse FSC-100MA does not specify. These variations reflect different thermal characteristics but do not affect interchangeability for standard 100 mA, 250 V applications.

Q: Can I substitute based on DC cold resistance alone?

A: No. DC cold resistance is a secondary parameter. Primary substitution criteria are current rating, voltage rating, response time, package dimensions, and fuse type. DC cold resistance values range from 3.8 to 8.4 Ohms among substitutes but do not determine interchangeability.

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