GDA-6.3A Ceramic Fuse Cartridge Equivalent & Substitute Parts

Part Overview

The Eaton GDA-6.3A is a ceramic fuse cartridge rated at 6.3 amperes, 250 volts AC/DC with fast-blow response characteristics. This component is designed for use in 5mm x 20mm fuse holders and requires an external mounting holder for installation. The part maintains active product status with 928 pieces in current inventory stock.

Equivalent and substitute parts are necessary when primary inventory is depleted, when alternative manufacturers offer improved lead times, or when specific compliance certifications are required for particular applications or regional markets.

Key Parameters

Parameter	Value
Current Rating	6.3 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Package / Case	5mm x 20mm
Response Time	Fast Blow
Breaking Capacity @ Rated Voltage	1.5 kA
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution eligibility for the GDA-6.3A is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Current Rating: 6.3 A
Voltage Rating (AC): 250 V
Fuse Type: Cartridge, Ceramic
Package / Case: 5mm x 20mm
Response Time: Fast Blow
Mounting Type: Requires Holder
Physical Dimensions: 0.205" Dia x 0.787" L (5.20mm x 20.00mm)

All substitute parts listed meet these mandatory parameters. Variations in secondary parameters such as melting I²t, DC cold resistance, breaking capacity, operating temperature range, and approval agencies do not disqualify a part from substitution eligibility, as these represent performance characteristics within acceptable engineering tolerances for this component category.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (A)	Voltage Rating (V AC)	Fuse Type	Package / Case	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status	Inventory (Pcs)
GDA-6.3A	Eaton - Electronics Division	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	48	0.014	Active	928
BK/GDA-6.3A	Eaton - Electronics Division	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	48	0.014	Active	1701
BK/S501-6.3-R	Eaton - Electronics Division	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	48	0.014	Active	1142
BK1/S501-6.3-R	Eaton - Electronics Division	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	48	0.014	Active	1763
0001.1012	SCHURTER Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	36.7	Not Specified	Active	38446
021606.3HXP	Littelfuse Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	56.43	0.0137	Active	1300
021606.3MXP	Littelfuse Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	56.43	0.0137	Active	2445
021606.3TXP	Littelfuse Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	56.43	0.0137	Active	892
021606.3VXP	Littelfuse Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	56.43	0.0137	Active	819
23016300021P	Littelfuse Inc.	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1 kA	5	Not Specified	Active	1287
FCC-6.3A	OptiFuse	6.3	250	Cartridge, Ceramic	5mm x 20mm	Fast Blow	200 A	48.237	0.0129	Active	702

Engineering Selection Recommendations

Eaton GDA Series (BK/GDA-6.3A, BK/S501-6.3-R, BK1/S501-6.3-R): These parts are manufactured by Eaton - Electronics Division and maintain identical electrical and mechanical specifications to the primary GDA-6.3A part. Selection from this group is appropriate when maintaining single-manufacturer sourcing is a requirement or when existing supply chain relationships with Eaton are established. All three variants carry active product status and meet CCC, CSA, and IMQ certifications.

Littelfuse 216 Series (021606.3HXP, 021606.3MXP, 021606.3TXP, 021606.3VXP): These parts are suitable for applications requiring extended operating temperature range (-55°C to 125°C) and comprehensive international certifications including BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE. The 216 series variants differ in melting I²t (56.43) compared to the GDA-6.3A (48), representing tighter thermal response characteristics. These parts are appropriate for markets with stringent compliance requirements.

Littelfuse 230 Series (23016300021P): This part is suitable for applications with restricted operating temperature range (-25°C to 70°C) and lower breaking capacity (1 kA). Selection of this variant is appropriate only when application thermal and electrical requirements align with these reduced specifications.

SCHURTER 0001.1012: This part offers the highest inventory availability (38,446 pieces) and extended operating temperature range (-55°C to 125°C). It carries certifications from CCC, cURus, KC, PSE/JET, and VDE. The melting I²t value (36.7) is lower than the GDA-6.3A, indicating faster thermal response. Selection is appropriate for high-volume procurement requirements and applications requiring PSE/JET certification.

OptiFuse FCC-6.3A: This part carries UL 248 and cULus certifications with operating temperature range of -55°C to 125°C. The breaking capacity specification (200 A) differs from other parts listed. Selection is appropriate for North American applications requiring UL certification.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts directly into an application designed for the GDA-6.3A?

A: All listed substitute parts meet the mandatory equivalence parameters: 6.3 A current rating, 250 V AC voltage rating, ceramic cartridge fuse type, 5mm x 20mm package dimensions, fast-blow response, and holder-mount configuration. Direct substitution is supported from an electrical and mechanical standpoint. Compliance certifications should be verified against application-specific regulatory requirements.

Q: What is the difference between the Eaton GDA-6.3A and BK/GDA-6.3A variants?

A: Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications, current rating, voltage rating, fuse type, package dimensions, response time, and breaking capacity. The primary difference is inventory availability, with BK/GDA-6.3A offering higher stock levels (1701 pieces versus 928 pieces). Certification profiles differ slightly, with BK/GDA-6.3A including UL certification while the primary GDA-6.3A includes UR certification.

Q: Why do Littelfuse 216 series parts show different melting I²t values?

A: The melting I²t parameter (56.43 for Littelfuse 216 series versus 48 for GDA-6.3A) represents the thermal energy required to melt the fuse element. This variation falls within acceptable engineering tolerances for this component category and does not disqualify these parts from substitution. Both values maintain the same current rating and response time classification.

Q: Which substitute part has the best availability?

A: SCHURTER 0001.1012 offers the highest inventory level at 38,446 pieces. Among Eaton variants, BK1/S501-6.3-R provides 1763 pieces. Among Littelfuse options, 021606.3MXP offers 2445 pieces.

Q: Are there temperature range differences I should consider?

A: The primary GDA-6.3A does not specify an operating temperature range. Substitute parts with specified ranges include: Littelfuse 216 series (-55°C to 125°C), SCHURTER 0001.1012 (-55°C to 125°C), OptiFuse FCC-6.3A (-55°C to 125°C), and Littelfuse 230 series (-25°C to 70°C). Selection should align with application thermal requirements.

Q: What certifications should I verify for my specific market?

A: The GDA-6.3A carries CCC, CSA, IMQ, SEMKO, and UR certifications. Substitute parts carry varying certification profiles. Littelfuse 216 series includes BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE. SCHURTER 0001.1012 includes CCC, cURus, KC, PSE/JET, and VDE. OptiFuse FCC-6.3A includes cULus and UL 248. Verify that selected substitute meets all regulatory requirements for your target market.

Q: Can I use the Littelfuse 230 series (23016300021P) as a direct substitute?

A: The Littelfuse 230 series meets all mandatory equivalence parameters for electrical and mechanical compatibility. However, it specifies a lower breaking capacity (1 kA versus 1.5 kA for other parts) and a restricted operating temperature range (-25°C to 70°C). Substitution is appropriate only when application requirements align with these reduced specifications.

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