BK/S501-630-R Ceramic Fuse 630mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The BK/S501-630-R is a ceramic cartridge fuse manufactured by Eaton Electronics Division, rated for 630mA at 250VAC with a 5mm x 20mm form factor. This fast-blow fuse is designed for applications requiring circuit protection in AC/DC systems and requires a compatible fuse holder for installation. The part is active in production with 845 units currently in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and approval certifications to ensure direct functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	630 mA
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	1.5kA
Mounting Type	Requires Holder
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S501-630-R is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Current Rating: 630 mA (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity @ Rated Voltage: 1.5kA (exact match required)
Mounting Type: Requires Holder (exact match required)

All substitute parts listed below meet these criteria. Secondary parameters such as melting I²t, DC cold resistance, and approval agencies may vary within acceptable engineering tolerances but do not affect functional interchangeability in the specified application.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (mA)	Voltage - AC (V)	Package	Breaking Capacity (kA)	Response Time	Melting I²t	DC Cold Resistance (Ω)	Approval Agency	Inventory (Pcs)
BK/S501-630-R	Eaton - Electronics Division	630	250	5x20mm	1.5	Fast Blow	0.064	0.34	CSA, cULus	845
BK/GDA-630MA	Eaton - Electronics Division	630	250	5x20mm	1.5	Fast Blow	0.064	0.34	CSA, UL	1067
BK1/S501-630-R	Eaton - Electronics Division	630	250	5x20mm	1.5	Fast Blow	0.064	0.34	CSA, cURus	1963
GDA-630MA	Eaton - Electronics Division	630	250	5x20mm	1.5	Fast Blow	0.064	0.34	CSA, UR	915
0216.630MXP	Littelfuse Inc.	630	250	5x20mm	1.5	Fast Blow	0.175	0.465	CCC, CE, CSA, SEMKO, UR, VDE	942
5HF 630-R	Bel Fuse Inc.	630	250	5x20mm	1.5	Fast Blow	0.29	0.286	CCC, CE, CSA, cULus	1691
0001.1002	SCHURTER Inc.	630	250	5x20mm	1.5	Fast Blow	0.207	Not Specified	CCC, cURus, KC, VDE	1570
0216.630HXP	Littelfuse Inc.	630	250	5x20mm	1.5	Fast Blow	0.175	0.465	CCC, CE, CSA, SEMKO, UR, VDE	1190
0216.630TXP	Littelfuse	630	250	5x20mm	1.5	Fast Blow	0.175	0.465	CCC, CE, CSA, SEMKO, UR, VDE	1162
FCD-630MA	OptiFuse	630	250	5x20mm	1.5	Fast Blow	0.0672	Not Specified	IEC 60127	3827

Engineering Selection Recommendations

Eaton Electronics Division Parts (BK/S501-630-R, BK/GDA-630MA, BK1/S501-630-R, GDA-630MA): All Eaton variants meet the primary substitution criteria and maintain identical electrical and mechanical specifications. Selection among these parts depends on approval agency requirements for the target application. BK1/S501-630-R offers the highest inventory availability (1963 units) within the Eaton product line.

Littelfuse Parts (0216.630MXP, 0216.630HXP, 0216.630TXP): These parts are direct manufacturer equivalents with extended operating temperature range (-55°C to 125°C) and broader approval certifications (CCC, CE, CSA, SEMKO, UR, VDE). All three variants share identical electrical parameters and are suitable for applications requiring wider temperature performance or international compliance.

Bel Fuse Inc. (5HF 630-R): This part meets all primary substitution criteria with CSA and cULus certifications. Operating temperature range extends to -55°C to 125°C. Mechanical dimensions are 5.10mm x 20.00mm (diameter tolerance variation within acceptable range).

SCHURTER Inc. (0001.1002): Designated as SP 5x20 series, this part satisfies all primary criteria with certifications including CCC, cURus, KC, and VDE. Operating temperature range is -55°C to 125°C.

OptiFuse (FCD-630MA): This part provides the highest inventory availability (3827 units) and meets all primary substitution criteria. It includes explicit 250V DC voltage rating in addition to 250V AC. IEC 60127 certification is specified.

Frequently Asked Questions (FAQ)

Q: Can I substitute BK/S501-630-R with any of the listed parts without circuit redesign?

A: Yes. All listed parts are functionally equivalent based on matching current rating (630mA), voltage rating (250VAC), package dimensions (5x20mm), response time (fast blow), and breaking capacity (1.5kA). No circuit redesign is required. The fuse holder compatibility remains unchanged.

Q: What is the significance of different melting I²t values among the substitute parts?

A: Melting I²t is a thermal characteristic that affects the fuse's response to overcurrent conditions. While values vary among substitutes (ranging from 0.064 to 0.29), all parts are rated for the same current and voltage, ensuring they operate within the same protection envelope for the specified application. The variation reflects different ceramic formulations and construction methods among manufacturers.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are RoHS3 compliant except FCD-630MA, which specifies ROHS3 compliance. All parts are REACH unaffected or not subject to REACH restrictions.

Q: Which substitute part has the best availability?

A: OptiFuse FCD-630MA offers the highest inventory with 3827 units in stock, followed by BK1/S501-630-R with 1963 units.

Q: Do I need to consider approval certifications when selecting a substitute?

A: Yes. The target application may require specific approval certifications. The original BK/S501-630-R specifies CSA and cULus. Littelfuse parts (0216.630MXP, 0216.630HXP, 0216.630TXP) provide broader international certifications (CCC, CE, CSA, SEMKO, UR, VDE). Verify that the selected substitute meets your application's regulatory requirements.

Q: What is the operating temperature range for the original BK/S501-630-R?

A: Operating temperature is not specified in the provided data for BK/S501-630-R. Substitute parts from Littelfuse, Bel Fuse, and SCHURTER specify -55°C to 125°C operating range. OptiFuse FCD-630MA also specifies -55°C to 125°C.

Q: Are the physical dimensions identical across all substitute parts?

A: Dimensions are nominally 5mm x 20mm across all parts. Bel Fuse 5HF 630-R specifies 5.10mm diameter (versus 5.20mm for others), which represents a tolerance variation within acceptable mechanical limits for standard 5x20mm fuse holders.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message