GDB-1A Glass Cartridge Fuse 1A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The GDB-1A is a 1 A, 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, response characteristics, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	1 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35 A
Mounting Type	Requires Holder

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (1 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (fast blow), package dimensions (5mm x 20mm), and breaking capacity (35 A). All substitute parts listed maintain these core electrical and mechanical specifications. Variations in melting I²t values, DC cold resistance, operating temperature ranges, and approval agency certifications are documented but do not disqualify substitution when the primary protection parameters remain identical. Parts are grouped by manufacturer to facilitate sourcing and inventory management.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (A)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	Operating Temperature
GDB-1A	Eaton - Electronics Division	GDB	1	250	Fast Blow	5x20mm	35	0.6	0.125	Not Specified
BK/GDB-1A	Eaton - Electronics Division	GDB	1	250	Fast Blow	5x20mm	35	0.6	0.125	Not Specified
BK/S500-1-R	Eaton - Electronics Division	S500	1	250	Fast Blow	5x20mm	35	0.6	0.125	Not Specified
BK1/S500-1-R	Eaton - Electronics Division	S500	1	250	Fast Blow	5x20mm	35	0.6	0.125	Not Specified
GMA-1-R	Eaton - Electronics Division	GMA	1	250	Fast Blow	5x20mm	35	0.48	0.163	Not Specified
0034.1516	SCHURTER Inc.	FSF 5x20	1	250	Fast Blow	5x20mm	35	1.13	Not Specified	-55°C ~ 125°C
0034.3872	SCHURTER Inc.	FSK 5x20	1	250	Fast Blow	5x20mm	35	0.68	Not Specified	-40°C ~ 85°C
0217001.HXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	-55°C ~ 125°C
0217001.MXBP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	-55°C ~ 125°C
0217001.MXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	-55°C ~ 125°C
0217001.TXP	Littelfuse Inc.	217	1	250	Fast Blow	5x20mm	35	1.045	0.0964	-55°C ~ 125°C

Engineering Selection Recommendations

All listed substitute parts maintain electrical and mechanical equivalence to the GDB-1A across current rating, voltage rating, response time, package dimensions, and breaking capacity. Selection among substitutes should be based on the following criteria:

Eaton Electronics Division Parts (BK/GDB-1A, BK/S500-1-R, BK1/S500-1-R, GMA-1-R): These parts share manufacturer origin with the primary component. BK/GDB-1A provides direct series equivalence. BK/S500-1-R and BK1/S500-1-R offer expanded approval certifications including BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. GMA-1-R series provides CSA, PSE, and UL certifications with lower melting I²t (0.48) and higher DC cold resistance (0.163 Ohms).

SCHURTER Inc. Parts (0034.1516, 0034.3872): These components provide alternative sourcing with extended operating temperature ranges. Part 0034.1516 (FSF 5x20 series) operates from -55°C to 125°C with melting I²t of 1.13 and holds CCC, cURus, PSE/JET, and VDE certifications. Part 0034.3872 (FSK 5x20 series) operates from -40°C to 85°C with melting I²t of 0.68 and cULus certification.

Littelfuse Inc. Parts (0217001.HXP, 0217001.MXBP, 0217001.MXP, 0217001.TXP): All Littelfuse 217 series variants provide identical electrical specifications with melting I²t of 1.045 and DC cold resistance of 0.0964 Ohms. Operating temperature range is -55°C to 125°C. These parts hold the broadest approval certifications: BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. Variants differ in packaging designation (HXP, MXBP, MXP, TXP) but maintain equivalent electrical performance.

All substitute parts are RoHS3 compliant and REACH unaffected. Product status is active for all listed components.

Frequently Asked Questions (FAQ)

Q: Can BK/GDB-1A be used as a direct replacement for GDB-1A?

A: Yes. BK/GDB-1A maintains identical electrical ratings (1 A, 250 V AC), response time (fast blow), package dimensions (5x20mm), and breaking capacity (35 A). Both are Eaton Electronics Division products in the GDB series with the same melting I²t (0.6) and DC cold resistance (0.125 Ohms).

Q: What is the difference between the Eaton S500 series parts (BK/S500-1-R and BK1/S500-1-R)?

A: Both S500 series parts are electrically equivalent to GDB-1A with identical current, voltage, response time, and package specifications. BK1/S500-1-R includes additional approval certifications (PSE, cURus) compared to BK/S500-1-R (cULus). Both support extended operating temperature ranges and are RoHS3 compliant.

Q: How do melting I²t values affect substitution?

A: Melting I²t values indicate thermal energy required to melt the fuse element. While substitute parts show variations (ranging from 0.48 to 1.13), all maintain the same current rating (1 A) and breaking capacity (35 A). These variations reflect different fuse element designs but do not prevent substitution when primary protection parameters remain constant.

Q: Are Littelfuse 217 series parts (0217001.HXP, 0217001.MXBP, 0217001.MXP, 0217001.TXP) interchangeable?

A: Yes. All four Littelfuse 217 series variants are electrically and mechanically equivalent. Designations (HXP, MXBP, MXP, TXP) represent packaging or distribution channel variations. All maintain 1 A current rating, 250 V voltage rating, fast-blow response, 5x20mm package, and identical melting I²t (1.045) and DC cold resistance (0.0964 Ohms).

Q: Which substitute part offers the widest operating temperature range?

A: Both SCHURTER 0034.1516 and all Littelfuse 217 series parts (0217001.HXP, 0217001.MXBP, 0217001.MXP, 0217001.TXP) operate across -55°C to 125°C, providing the widest temperature specification among listed substitutes.

Q: What approval certifications should I consider for regulatory compliance?

A: The GDB-1A holds VDE and UR certifications. Substitute parts offer expanded certifications: Eaton S500 series includes BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. Littelfuse 217 series provides the broadest coverage with BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. SCHURTER parts hold CCC, cURus, PSE/JET, and VDE (0034.1516) or cULus (0034.3872).

Q: Can I substitute a part with different DC cold resistance?

A: DC cold resistance variations (ranging from 0.0964 to 0.163 Ohms among substitutes) reflect element design differences but do not prevent substitution. All parts maintain the same current rating and voltage rating. Selection should account for circuit impedance requirements if DC resistance is a critical design parameter.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and REACH unaffected, matching the environmental compliance status of the GDB-1A.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message