Equivalent & Substitute Parts for BK/GDC-80MA

Part Overview

The BK/GDC-80MA is an 80 mA, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm package manufactured by Eaton - Electronics Division. This fuse is designed for circuit protection applications requiring a slow-blow response characteristic and operates within a breaking capacity of 35A at rated voltage. The part is Active in product status and RoHS Compliant, making it suitable for modern electronic equipment requiring environmental compliance.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same fuse category, voltage rating, current rating, response time, and physical dimensions. Alternative sources and series variants are documented to support procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Current Rating	80 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
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the BK/GDC-80MA is determined by strict equivalence across the following parameters:

Critical Matching Parameters:

Current Rating: 80 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Slow Blow (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Breaking Capacity @ Rated Voltage: 35A (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed maintain these critical parameters. Variations in melting I²t, operating temperature ranges, and approval agencies are documented but do not disqualify substitution eligibility when all critical parameters align. Manufacturer differences (Eaton vs. SCHURTER) are permitted provided electrical and mechanical specifications remain equivalent.

Parameter Comparison

Parameter	BK/GDC-80MA	BK/S506-80-R	BK1/S506-80-R	0034.3106	0034.3761	0034.5606.11
Manufacturer	Eaton	Eaton	Eaton	SCHURTER	SCHURTER	SCHURTER
Current Rating (mA)	80	80	80	80	80	80
Voltage Rating (V AC)	250	250	250	250	250	250
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A	35A	35A	35A	35A	35A
Mounting Type	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder	Requires Holder
Melting I²t	0.038	0.038	0.038	0.057	0.0367	0.057
DC Cold Resistance (Ohms)	4.42	4.42	4.42	Not specified	Not specified	Not specified
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Eaton Series Substitutes (BK/S506-80-R, BK1/S506-80-R): These parts maintain identical electrical specifications to the BK/GDC-80MA, including melting I²t of 0.038 and DC cold resistance of 4.42 Ohms. Both are manufactured by Eaton - Electronics Division and carry ROHS3 Compliant status. BK/S506-80-R holds broader approval agency certifications (BSI, CCC, CSA, IMQ, SEMKO, UR, VDE) compared to the main part (cULus, IMQ). BK1/S506-80-R is a parametric equivalent within the same S506 series with identical specifications and expanded certifications. These are direct substitutes for applications where Eaton sourcing is preferred or required.

SCHURTER Series Substitutes (0034.3106, 0034.3761, 0034.5606.11): SCHURTER parts maintain all critical electrical and mechanical parameters but exhibit variations in melting I²t and operating temperature ranges. Part 0034.3106 (FST 5x20 series) and 0034.5606.11 (SMD-FST series) both specify melting I²t of 0.057, differing from the main part's 0.038. Part 0034.3761 (FSL 5x20 series) specifies melting I²t of 0.0367, closest to the main part. Operating temperature ranges vary: 0034.3106 operates -55°C to 125°C, 0034.3761 operates -40°C to 85°C, and 0034.5606.11 operates -55°C to 125°C. All SCHURTER parts are ROHS3 Compliant and REACH Unaffected. Selection among SCHURTER variants depends on application temperature requirements and melting I²t tolerance specifications.

All substitute parts are Active in product status and suitable for direct replacement in equivalent circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can BK/S506-80-R be used as a direct replacement for BK/GDC-80MA?

A: Yes. BK/S506-80-R is a direct manufacturer substitute from Eaton - Electronics Division with identical current rating (80 mA), voltage rating (250 V AC), fuse type (Cartridge, Glass), response time (Slow Blow), package dimensions (5mm x 20mm), breaking capacity (35A), and DC cold resistance (4.42 Ohms). Both parts are Active in product status and RoHS Compliant.

Q: What is the difference between BK/S506-80-R and BK1/S506-80-R?

A: Both parts are parametric equivalents from Eaton with identical electrical and mechanical specifications. BK1/S506-80-R is designated as a parametric equivalent variant within the S506 series. Both maintain 80 mA current rating, 250 V voltage rating, 0.038 melting I²t, and 4.42 Ohms DC cold resistance. Selection between them depends on part availability and procurement requirements.

Q: Why do SCHURTER parts show different melting I²t values?

A: Melting I²t is a thermal characteristic that varies by manufacturer design and construction. SCHURTER parts 0034.3106 and 0034.5606.11 specify 0.057, while 0034.3761 specifies 0.0367. These variations do not disqualify substitution when all critical parameters (current, voltage, response time, package, breaking capacity) remain equivalent. Application-specific thermal requirements should determine selection among these variants.

Q: Are SCHURTER parts compatible with the same fuse holder as BK/GDC-80MA?

A: Yes. All substitute parts maintain the 5mm x 20mm package dimension and Requires Holder mounting type, ensuring mechanical compatibility with standard 5x20mm fuse holders.

Q: What approval agencies certify each substitute part?

A: BK/GDC-80MA carries cULus and IMQ certifications. BK/S506-80-R and BK1/S506-80-R carry BSI, CCC, CSA, IMQ, SEMKO, UR, and VDE certifications. SCHURTER part 0034.3106 carries CCC, cURus, and VDE certifications. Part 0034.3761 carries cULus certification. Part 0034.5606.11 carries cURus and VDE certifications. Selection based on required certifications for specific applications or regional compliance requirements.

Q: Can these fuses be used in both AC and DC circuits?

A: All parts are rated for 250 V AC. DC voltage ratings are not specified in the provided data. Application in DC circuits requires verification against specific circuit voltage and current requirements.

Q: What is the operating temperature range for each part?

A: BK/GDC-80MA does not specify an operating temperature range. BK/S506-80-R and BK1/S506-80-R do not specify operating temperature ranges. SCHURTER part 0034.3106 operates -55°C to 125°C. Part 0034.3761 operates -40°C to 85°C. Part 0034.5606.11 operates -55°C to 125°C. Application in temperature-constrained environments should reference these specifications.

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