S501-500-R Equivalent & Substitute Parts

Part Overview

The S501-500-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 500 mA at 250 V AC/DC with fast-blow response characteristics. This component is designed for applications requiring overcurrent protection in a 5mm x 20mm form factor and requires a compatible fuse holder for installation. The part maintains Active product status with 958 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative manufacturers' components meet identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	500 mA
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	1.5 kA
Mounting Type	Requires Holder
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the S501-500-R is determined by strict equivalence across the following critical parameters: current rating (500 mA), AC voltage rating (250 V), fuse type (cartridge ceramic), response time (fast blow), physical package dimensions (5mm x 20mm), breaking capacity (1.5 kA), and mounting requirement (holder-based installation). All identified substitute parts meet these core electrical and mechanical specifications without deviation. Substitutes are grouped into two categories: parametric equivalents from Eaton - Electronics Division (BK/S501-500-R and BK/GDA-500MA) and direct manufacturer equivalents from Littelfuse Inc., SCHURTER Inc., and OptiFuse. Differences in secondary parameters such as melting I²t values, DC cold resistance, operating temperature ranges, and approval agency certifications do not disqualify substitution when primary electrical and mechanical parameters align.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (Amps)	Voltage Rating - AC	Fuse Type	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Mounting Type	RoHS Status	Product Status
S501-500-R	Eaton - Electronics Division	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
BK/S501-500-R	Eaton - Electronics Division	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
BK/GDA-500MA	Eaton - Electronics Division	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
0216.500MXP	Littelfuse Inc.	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
0216.500HXP	Littelfuse Inc.	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
0001.1001	SCHURTER Inc.	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active
FCD-500MA	OptiFuse	500 mA	250 V	Cartridge, Ceramic	Fast Blow	5mm x 20mm	1.5 kA	Requires Holder	ROHS3 Compliant	Active

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, confirming ongoing manufacturer support and environmental regulatory adherence. Selection among equivalent options is based on approval agency certifications relevant to the target application. The S501-500-R and BK/S501-500-R both carry BSI, CCC, CSA, cURus, IMQ, SEMKO, and VDE certifications. The BK/GDA-500MA variant carries CCC, CSA, IMQ, SEMKO, and UL certifications. Littelfuse 0216.500MXP and 0216.500HXP parts carry CCC, CE, CSA, SEMKO, UR, and VDE certifications. SCHURTER 0001.1001 carries CCC, cURus, KC, and VDE certifications. OptiFuse FCD-500MA carries IEC 60127 certification. Component selection should prioritize certifications matching the end-application regulatory requirements. All parts are available in bulk packaging with inventory quantities ranging from 958 to 6884 units, supporting both immediate procurement and long-term supply planning.

Frequently Asked Questions (FAQ)

Q: Can BK/GDA-500MA be used as a direct replacement for S501-500-R?

A: Yes. Both parts share identical electrical ratings (500 mA, 250 V AC), fuse type (cartridge ceramic), response time (fast blow), physical dimensions (5mm x 20mm), breaking capacity (1.5 kA), and mounting requirements (holder-based). Both are ROHS3 compliant and maintain Active product status. Certification differences (BK/GDA-500MA includes UL; S501-500-R includes BSI and cURus) do not affect substitution when application requirements align with the available certifications.

Q: What is the difference between Littelfuse 0216.500MXP and 0216.500HXP?

A: Both Littelfuse parts meet identical electrical and mechanical specifications for the S501-500-R. The primary difference is melting I²t value (0.165 for both), DC cold resistance (0.866 Ohms for both), and operating temperature range (-55°C to 125°C for both). Both carry the same approval agencies (CCC, CE, CSA, SEMKO, UR, VDE) and are ROHS3 compliant. Selection between these variants depends on application-specific thermal and resistance requirements.

Q: Are there DC voltage rating differences among the substitutes?

A: The S501-500-R is rated for 250 V AC/DC. FCD-500MA explicitly specifies 250 V DC rating. Other substitutes do not explicitly state DC voltage ratings in the provided specifications. When DC operation is required, FCD-500MA provides documented DC voltage specification. For AC-only applications, all substitutes are equivalent.

Q: What inventory considerations apply when selecting a substitute?

A: Current inventory levels vary significantly: S501-500-R (958 units), BK/S501-500-R (1108 units), BK/GDA-500MA (2151 units), 0216.500MXP (6884 units), 0216.500HXP (1126 units), 0001.1001 (1165 units), and FCD-500MA (2824 units). Selection based on immediate availability should prioritize 0216.500MXP (highest stock) or FCD-500MA (second highest). For long-term supply planning, multiple sources across manufacturers ensure continuity.

Q: Do operating temperature ranges affect substitution suitability?

A: The S501-500-R does not specify an operating temperature range. Littelfuse 0216.500MXP, 0216.500HXP, SCHURTER 0001.1001, and OptiFuse FCD-500MA all specify -55°C to 125°C operating range. When application environments require operation outside standard temperature ranges, selection should prioritize parts with documented temperature specifications matching the end-use environment.

Q: What approval agencies are most relevant for industrial applications?

A: VDE, CSA, and CCC certifications are widely recognized for industrial and consumer applications in Europe, North America, and Asia respectively. All substitute parts carry at least VDE and CSA certifications. UL certification (available on BK/GDA-500MA) is standard for North American industrial equipment. CE marking (available on Littelfuse parts) indicates compliance with European Union directives. Application-specific regulatory requirements should guide final selection.

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