Equivalent & Substitute Parts for BK/GDA-3.15A Ceramic Fuse

Part Overview

The BK/GDA-3.15A is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated at 3.15 A, 250 V AC, with fast-blow response characteristics. This component is designed for applications requiring overcurrent protection in circuits rated up to 250 V AC. The part is currently active in production with 770 units in stock. Substitute parts are identified based on matching electrical ratings, mechanical dimensions, and approval certifications to ensure direct functional equivalence in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	3.15 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
DC Cold Resistance	0.037 Ohms
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitute parts for the BK/GDA-3.15A are classified based on strict electrical and mechanical parameter matching:

Direct Manufacturer Equivalents (Eaton - Electronics Division):

BK/S501-3.15-R
BK1/S501-3.15-R
S501-3.15-R

These parts share identical current rating (3.15 A), voltage rating (250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response time (fast blow), and breaking capacity (1.5 kA). All require a fuse holder for installation.

Cross-Manufacturer Direct Equivalents:

0001.1009 (SCHURTER Inc.)
02163.15MXP (Littelfuse Inc.)
FCD-3.15A (OptiFuse)

These parts match all critical electrical parameters: 3.15 A current rating, 250 V AC voltage rating, ceramic cartridge construction, 5mm x 20mm package, fast-blow response, and 1.5 kA breaking capacity. All require holder mounting.

Similar Part (Dimensional Variation):

02163.15MXEP (Littelfuse Inc.)

This part matches electrical specifications but features through-hole mounting and slightly different physical dimensions (0.228" Dia x 0.886" L vs. 0.205" Dia x 0.787" L), requiring different installation methodology.

Parameter Comparison

Part Number	Manufacturer	Current Rating (A)	Voltage AC (V)	Fuse Type	Package	Response Time	Breaking Capacity (kA)	Mounting Type	Melting I²t	Inventory (Pcs)
BK/GDA-3.15A	Eaton	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	8.1	770
BK/S501-3.15-R	Eaton	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	8.1	1216
BK1/S501-3.15-R	Eaton	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	8.1	2016
S501-3.15-R	Eaton	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	8.1	837
0001.1009	SCHURTER Inc.	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	6.78	4321
02163.15MXP	Littelfuse Inc.	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	6.7	16650
02163.15MXEP	Littelfuse Inc.	3.15	250	Ceramic Cartridge	5x20mm (Axial)	Fast Blow	1.5	Through Hole	6.7	3100
FCD-3.15A	OptiFuse	3.15	250	Ceramic Cartridge	5x20mm	Fast Blow	1.5	Requires Holder	4.271	872

Engineering Selection Recommendations

Primary Substitutes (Eaton S501 Series): BK/S501-3.15-R, BK1/S501-3.15-R, and S501-3.15-R are direct functional equivalents manufactured by Eaton - Electronics Division. These parts maintain identical electrical specifications, mechanical dimensions, and response characteristics. Selection among these three variants depends on packaging designation and internal part numbering conventions. All three carry active product status with expanded approval certifications including BSI, CCC, CSA, cULus, IMQ, MITI/JET, SEMKO, and VDE.

Cross-Manufacturer Alternatives: 0001.1009 (SCHURTER Inc.), 02163.15MXP (Littelfuse Inc.), and FCD-3.15A (OptiFuse) provide functional equivalence with matching electrical ratings and package dimensions. These parts are suitable for direct substitution in holder-mounted applications. SCHURTER 0001.1009 operates across -55°C to 125°C temperature range. Littelfuse 02163.15MXP operates across -55°C to 125°C and carries comprehensive international certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE). OptiFuse FCD-3.15A operates across -55°C to 125°C with IEC 60127 certification.

Dimensional Variant: Littelfuse 02163.15MXEP differs in mounting methodology (through-hole vs. holder-mounted) and physical dimensions (0.228" Dia x 0.886" L). This part is suitable only for applications with through-hole PCB mounting capability and cannot be used as a direct drop-in replacement for holder-mounted installations.

Compliance Considerations: All substitute parts maintain ROHS3 compliance. Eaton parts carry REACH Unaffected or Vendor Undefined status. SCHURTER and Littelfuse parts carry REACH Unaffected status. OptiFuse FCD-3.15A carries REACH Unaffected status. All parts are classified under ECCN EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

Q: Can BK/S501-3.15-R be used as a direct replacement for BK/GDA-3.15A?

A: Yes. Both parts share identical electrical ratings (3.15 A, 250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm), response time (fast blow), and breaking capacity (1.5 kA). Both require holder mounting. The primary difference is the series designation (GDA vs. S501) and internal Eaton part numbering.

Q: What is the difference between BK/S501-3.15-R and 02163.15MXP?

A: Both parts are electrically equivalent with matching current rating, voltage rating, package size, and response characteristics. BK/S501-3.15-R is manufactured by Eaton - Electronics Division. 02163.15MXP is manufactured by Littelfuse Inc. The primary difference is manufacturer and approval agency certifications. Littelfuse carries broader international certifications (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) compared to Eaton (CCC, CSA, IMQ, SEMKO, UL).

Q: Why is 02163.15MXEP listed as a similar part rather than a direct substitute?

A: 02163.15MXEP differs in mounting type (through-hole vs. requires holder) and physical dimensions (0.228" Dia x 0.886" L vs. 0.205" Dia x 0.787" L). This part is designed for PCB through-hole mounting and cannot be installed in standard fuse holders designed for the 5mm x 20mm cartridge format. Direct substitution requires compatible holder hardware.

Q: Are there temperature operating range differences among substitute parts?

A: The main part BK/GDA-3.15A does not specify operating temperature range. Cross-manufacturer alternatives including SCHURTER 0001.1009, Littelfuse 02163.15MXP and 02163.15MXEP, and OptiFuse FCD-3.15A all operate across -55°C to 125°C temperature range, providing extended thermal capability.

Q: What is the significance of melting I²t values in the parameter comparison?

A: Melting I²t represents the thermal energy required to melt the fuse element. BK/GDA-3.15A specifies 8.1 I²t. Cross-manufacturer parts show lower values: SCHURTER 0001.1009 (6.78 I²t), Littelfuse parts (6.7 I²t), and OptiFuse FCD-3.15A (4.271 I²t). Lower I²t values indicate faster response to overcurrent conditions. These differences remain within acceptable parameters for 3.15 A fast-blow ceramic cartridge fuses.

Q: Which substitute part has the highest inventory availability?

A: Littelfuse 02163.15MXP has the highest inventory with 16,650 units in stock, followed by SCHURTER 0001.1009 with 4,321 units. Among Eaton parts, BK1/S501-3.15-R has 2,016 units available.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting Restriction of Hazardous Substances requirements for electronic components.

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