Equivalent & Substitute Parts for BK/S501-800-R

Part Overview

The BK/S501-800-R is an 800 mA ceramic fuse cartridge rated for 250 V AC/DC operation in a 5mm x 20mm package form factor. Manufactured by Eaton - Electronics Division, this fast-blow fuse cartridge requires a compatible holder for installation and is classified as Active product status. Alternative equivalent and substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers meeting identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Current Rating	800 mA
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 BK/S501-800-R is determined by strict equivalence across the following parameters: current rating of 800 mA, AC voltage rating of 250 V, ceramic cartridge fuse type, 5mm x 20mm package dimensions, fast-blow response characteristic, 1.5 kA breaking capacity, and holder-based mounting requirement. All substitute parts listed maintain these core electrical and mechanical specifications. Variations in melting I²t values, DC cold resistance, operating temperature ranges, and approval agency certifications do not disqualify parts from substitution eligibility when the primary parameters remain identical. Parts are grouped by manufacturer to facilitate procurement and supply chain management.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (Amps)	Voltage Rating - AC	Fuse Type	Package / Case	Response Time	Breaking Capacity @ Rated Voltage	Melting I²t	DC Cold Resistance (Ohms)	Product Status
BK/S501-800-R	Eaton - Electronics Division	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.097	0.245	Active
BK/GDA-800MA	Eaton - Electronics Division	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.097	0.245	Active
BK1/S501-800-R	Eaton - Electronics Division	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.097	0.245	Active
GDA-800MA	Eaton - Electronics Division	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.097	0.245	Active
0216.800HXP	Littelfuse Inc.	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.285	0.295	Active
0001.1003	SCHURTER Inc.	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.469	Not Provided	Active
0216.800MXP	Littelfuse Inc.	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.285	0.295	Active
FCD-800MA	OptiFuse	800 mA	250 V	Cartridge, Ceramic	5mm x 20mm	Fast Blow	1.5 kA	0.121	Not Provided	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and are qualified for direct substitution based on electrical and mechanical parameter equivalence. Selection among available substitutes may be determined by supply availability, approval agency certifications required for specific applications, and RoHS compliance status.

Eaton - Electronics Division parts (BK/GDA-800MA, BK1/S501-800-R, GDA-800MA) provide identical melting I²t and DC cold resistance characteristics to the primary BK/S501-800-R part, with BK1/S501-800-R offering ROHS3 compliance and REACH Unaffected status. Littelfuse Inc. parts (0216.800HXP, 0216.800MXP) provide extended operating temperature range (-55°C to 125°C) and include CE marking alongside other international certifications. SCHURTER Inc. part 0001.1003 offers extended operating temperature capability and cURus certification. OptiFuse FCD-800MA provides IEC 60127 approval agency designation and explicit 250 V DC voltage rating specification.

Frequently Asked Questions (FAQ)

Q: Can BK/S501-800-R be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical current rating (800 mA), AC voltage rating (250 V), ceramic cartridge fuse type, 5mm x 20mm package dimensions, fast-blow response time, 1.5 kA breaking capacity, and holder-based mounting requirement. Direct substitution is supported from an electrical and mechanical standpoint.

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

A: Melting I²t represents the thermal energy required to melt the fuse element. While substitute parts display variations in this parameter (ranging from 0.097 to 0.469), all parts maintain the same 800 mA current rating and fast-blow response classification. The melting I²t variation does not disqualify substitution eligibility when primary electrical specifications remain constant.

Q: Are there differences in approval agency certifications among the substitute parts?

A: Yes. The primary BK/S501-800-R carries BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE approvals. Substitute parts carry varying certification combinations. BK/GDA-800MA includes CCC, CSA, IMQ, SEMKO, and UL. Littelfuse parts include CCC, CE, CSA, SEMKO, UL, and VDE. SCHURTER 0001.1003 includes CCC, cURus, KC, and VDE. OptiFuse FCD-800MA carries IEC 60127 designation. Selection should align with application-specific certification requirements.

Q: Does the 5mm x 20mm package dimension remain consistent across all substitute parts?

A: Yes. All substitute parts maintain the 5mm x 20mm package dimension specification (0.205" Dia x 0.787" L). Physical compatibility with existing fuse holders is preserved across all listed substitutes.

Q: What is the difference between Eaton S501 and GDA series fuses?

A: Both S501 and GDA series from Eaton - Electronics Division maintain identical electrical specifications for the 800 mA 250 V AC rating. The series designation reflects internal product line organization. BK/S501-800-R, BK/GDA-800MA, BK1/S501-800-R, and GDA-800MA are all functionally equivalent for substitution purposes.

Q: Can FCD-800MA from OptiFuse be used as a substitute despite different approval agencies?

A: Yes. FCD-800MA maintains all required electrical and mechanical parameters. The part carries IEC 60127 approval and explicitly specifies 250 V DC rating in addition to 250 V AC. Substitution is supported when application certifications align with IEC 60127 requirements.

Q: Are there operating temperature considerations for substitute selection?

A: The primary BK/S501-800-R does not specify an operating temperature range. Littelfuse parts (0216.800HXP, 0216.800MXP) and SCHURTER 0001.1003 specify -55°C to 125°C operating range. OptiFuse FCD-800MA specifies -55°C to 125°C. Selection of temperature-rated parts may be beneficial for applications requiring extended temperature operation, though all parts remain electrically equivalent at standard operating conditions.

Q: Is RoHS compliance status uniform across all substitute parts?

A: No. BK/S501-800-R carries RoHS Compliant status. BK1/S501-800-R, Littelfuse parts, SCHURTER 0001.1003, and OptiFuse FCD-800MA carry ROHS3 Compliant status. BK/GDA-800MA and GDA-800MA do not specify RoHS status in provided data. Application requirements for RoHS compliance should guide selection when environmental regulations apply.

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