GDC-800MA Equivalent & Substitute Parts

Part Overview

The GDC-800MA is an 800 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm package format. This fuse requires a compatible holder for installation and is manufactured by Eaton - Electronics Division. The part is active in production status with cURus and IMQ approval certifications. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical dimensions, and functional performance parameters to ensure direct interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow 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 GDC-800MA are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

Current Rating: 800 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Response Time: Slow Blow (exact match required)
Breaking Capacity @ Rated Voltage: 35A (exact match required)

Mechanical Equivalence Criteria:

Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)
Size / Dimension: 0.205" Dia x 0.787" L (exact match required)

All substitute parts listed meet these core electrical and mechanical requirements. Variations in secondary parameters such as melting I²t, DC cold resistance, operating temperature range, and approval agencies are noted but do not preclude substitution when the primary criteria are satisfied.

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)	Approval Agency	RoHS Status
GDC-800MA	Eaton - Electronics Division	GDC	800 mA	250 V	Slow Blow	5mm x 20mm	35A	2.78	0.129	cURus, IMQ	Not Specified
BK/GDC-800MA	Eaton - Electronics Division	GDC	800 mA	250 V	Slow Blow	5mm x 20mm	35A	2.78	0.129	cULus, IMQ	RoHS Compliant
BK/GMD-800-R	Eaton - Electronics Division	GMD	800 mA	250 V	Slow Blow	5mm x 20mm	35A	6.6	0.4475	CSA, UL	ROHS3 Compliant
BK/S506-800-R	Eaton - Electronics Division	S506	800 mA	250 V	Slow Blow	5mm x 20mm	35A	2.78	0.129	BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE	ROHS3 Compliant
BK1/S506-800-R	Eaton - Electronics Division	S506	800 mA	250 V	Slow Blow	5mm x 20mm	35A	2.78	0.129	BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE	ROHS3 Compliant
S506-800-R	Eaton - Electronics Division	S506	800 mA	250 V	Slow Blow	5mm x 20mm	35A	2.78	0.129	BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE	ROHS3 Compliant
0034.3116	SCHURTER Inc.	FST 5x20	800 mA	250 V	Slow Blow	5mm x 20mm	35A	3.85	Not Specified	CCC, cURus, VDE	ROHS3 Compliant
0034.3774	SCHURTER Inc.	FSL 5x20	800 mA	250 V	Slow Blow	5mm x 20mm	35A	5.12	Not Specified	cULus	ROHS3 Compliant
0034.5042	SCHURTER Inc.	FTT 5x20	800 mA	250 V	Slow Blow	5mm x 20mm	35A	19.6	Not Specified	cURus	ROHS3 Compliant
0034.5616.11	SCHURTER Inc.	SMD-FST	800 mA	250 V	Slow Blow	5mm x 20mm	35A	3.85	Not Specified	cURus, VDE	ROHS3 Compliant
0034.5712.11	SCHURTER Inc.	SMD-FTT	800 mA	250 V	Slow Blow	5mm x 20mm	35A	19.6	Not Specified	cURus	ROHS3 Compliant

Engineering Selection Recommendations

Eaton - Electronics Division Substitutes:

The Eaton S506 series (BK/S506-800-R, BK1/S506-800-R, S506-800-R) provides direct electrical and mechanical equivalence to the GDC-800MA with expanded approval certifications including BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. These parts maintain identical melting I²t (2.78) and DC cold resistance (0.129 Ohms) characteristics and carry ROHS3 compliance status.

The BK/GDC-800MA variant is a direct equivalent with identical electrical parameters and matching melting I²t and resistance values. It includes RoHS compliance certification and cULus approval.

The BK/GMD-800-R from the GMD series meets all core electrical and mechanical requirements but exhibits different thermal characteristics (melting I²t of 6.6 and DC cold resistance of 0.4475 Ohms). This part carries CSA and UL certifications with ROHS3 compliance.

SCHURTER Inc. Substitutes:

SCHURTER fuses (0034.3116, 0034.3774, 0034.5042, 0034.5616.11, 0034.5712.11) satisfy all primary electrical and mechanical equivalence criteria. These parts differ in melting I²t values ranging from 3.85 to 19.6, reflecting variations in thermal response characteristics within the slow-blow category. All SCHURTER substitutes carry ROHS3 compliance and REACH Unaffected status. Operating temperature ranges vary by series, with some rated to -55°C ~ 125°C and others to -40°C ~ 85°C.

Selection among substitute parts should be based on specific circuit protection requirements, approval certifications needed for the application, and thermal response characteristics appropriate to the protected circuit.

Frequently Asked Questions (FAQ)

Q: Can BK/GDC-800MA be used as a direct replacement for GDC-800MA?

A: Yes. BK/GDC-800MA is a parametric equivalent with identical current rating (800 mA), voltage rating (250 V), response time (Slow Blow), package dimensions (5mm x 20mm), melting I²t (2.78), and DC cold resistance (0.129 Ohms). Both require a compatible fuse holder for installation.

Q: What is the difference between the Eaton S506 series and the GDC series?

A: The S506 series (BK/S506-800-R, BK1/S506-800-R, S506-800-R) maintains identical electrical and mechanical parameters to the GDC-800MA but includes expanded approval certifications (BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE) and ROHS3 compliance. The core fuse characteristics remain equivalent.

Q: Why do SCHURTER fuses have different melting I²t values?

A: Melting I²t is a thermal characteristic that defines the energy required to melt the fuse element. Different SCHURTER series (FST, FSL, FTT, SMD-FST, SMD-FTT) are designed with varying thermal response profiles while maintaining the same 800 mA current rating and 250 V voltage rating. Selection depends on the specific thermal protection requirements of the circuit.

Q: Are all substitute parts RoHS compliant?

A: The GDC-800MA does not specify RoHS status. Substitute parts from Eaton (BK/GDC-800MA, BK/GMD-800-R, S506 series) carry RoHS or ROHS3 compliance. All SCHURTER substitutes are ROHS3 compliant. Verify RoHS requirements for your specific application.

Q: Can I use a fuse with a higher melting I²t value as a substitute?

A: Melting I²t affects thermal response time but does not change the current rating or voltage rating. Substitution is based on matching electrical and mechanical parameters. However, thermal response characteristics should be evaluated for circuit-specific protection requirements.

Q: What approval certifications should I prioritize?

A: Selection of approval certifications depends on the end application and regional requirements. The GDC-800MA carries cURus and IMQ certifications. Eaton S506 series parts include broader certifications (BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE). SCHURTER parts carry cURus, VDE, and cULus certifications depending on the specific series. Verify certifications required by your application standards.

Q: Are all substitute parts available in the same 5mm x 20mm package?

A: Yes. All substitute parts listed are specified with a 5mm x 20mm package format (0.205" Dia x 0.787" L), ensuring mechanical compatibility with existing fuse holders designed for the GDC-800MA.

Q: What is the difference between BK/S506-800-R and BK1/S506-800-R?

A: Both parts are from the Eaton S506 series with identical electrical parameters, melting I²t (2.78), DC cold resistance (0.129 Ohms), and approval certifications. The designation difference (BK versus BK1) reflects manufacturing or packaging variants. Both are direct equivalents to the GDC-800MA.

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