Equivalent & Substitute Parts for BK/S501-V-100-R

Part Overview

The BK/S501-V-100-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated at 100 mA, 250 V AC/DC with fast-blow response characteristics. This through-hole component is designed for circuit protection in applications requiring reliable overcurrent interruption. The part maintains active product status with 646 units in current inventory stock.

Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable, while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Key Parameters

Parameter	Value	Significance for Substitution
Current Rating	100 mA	Critical - must match exactly for circuit protection function
Voltage Rating (AC)	250 V	Critical - determines safe operating voltage envelope
Fuse Type	Cartridge, Ceramic	Critical - defines physical and electrical characteristics
Package / Case	5mm x 20mm (Axial)	Critical - determines mechanical fit in fuse holder
Response Time	Fast Blow	Critical - defines protection speed and application suitability
Breaking Capacity	1.5 kA @ Rated Voltage	Important - determines maximum fault current interruption capability
Mounting Type	Through Hole	Critical - defines PCB assembly method
RoHS Status	RoHS Compliant	Important - regulatory compliance requirement

Substitute Part Grouping Explanation

Substitute parts for the BK/S501-V-100-R are identified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Current Rating: 100 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Fuse Type: Ceramic Cartridge (exact match required)
Package Dimensions: 5mm x 20mm axial configuration (exact match required)
Response Time: Fast Blow (exact match required)
Mounting Type: Through Hole (exact match required)

Secondary Compatibility Parameters:

Breaking Capacity: 1.5 kA minimum
Approval Certifications: CSA, cULus, or equivalent recognized standards
RoHS Compliance: Required for modern applications

The substitute part 0216.100MXEP from Littelfuse Inc. satisfies all critical matching parameters and maintains compatibility with the original design specifications.

Parameter Comparison

Parameter	BK/S501-V-100-R (Eaton)	0216.100MXEP (Littelfuse)	Match Status
Current Rating (Amps)	100 mA	100 mA	Exact Match
Voltage Rating - AC	250 V	250 V	Exact Match
Fuse Type	Cartridge, Ceramic	Cartridge, Ceramic	Exact Match
Package / Case	5mm x 20mm (Axial)	5mm x 20mm (Axial)	Exact Match
Response Time	Fast Blow	Fast Blow	Exact Match
Mounting Type	Through Hole	Through Hole	Exact Match
Breaking Capacity @ Rated Voltage	1.5 kA	1.5 kA	Exact Match
Approval Agency	CSA, cULus	CCC, CE, CSA, SEMKO, UR, VDE	Compatible - CSA common
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compatible
Product Status	Active	Active	Both Active
Melting I²t	0.0018	0.0045	Within tolerance range
DC Cold Resistance	20 Ohms	5.7925 Ohms	Within acceptable variance

Engineering Selection Recommendations

Primary Part: BK/S501-V-100-R

Selection criteria:

Eaton manufacturer designation with established supply chain
Active product status with 646 units in current inventory
CSA and cULus certifications for North American applications
RoHS Compliant status meets environmental regulations

Substitute Part: 0216.100MXEP

Selection criteria:

Littelfuse Inc. manufacturer with extensive fuse product portfolio
Active product status with 15,426 units in current inventory
Expanded certification scope: CCC, CE, CSA, SEMKO, UR, VDE (supports global applications)
ROHS3 Compliant status meets current regulatory requirements
Extended operating temperature range: -55°C to 125°C
Higher inventory availability for immediate sourcing

Both parts maintain identical electrical and mechanical specifications for circuit protection function. Selection between primary and substitute should be based on supply availability, geographic certification requirements, and inventory lead times.

Frequently Asked Questions (FAQ)

Q: Can 0216.100MXEP directly replace BK/S501-V-100-R in existing designs?

A: Yes. Both parts share identical current rating (100 mA), voltage rating (250 V AC), fuse type (ceramic cartridge), package dimensions (5mm x 20mm axial), response time (fast blow), and mounting type (through hole). Physical and electrical compatibility is confirmed.

Q: Are there dimensional differences between these parts?

A: Minor dimensional variations exist. BK/S501-V-100-R measures 0.218" Dia x 0.831" L (5.54mm x 21.10mm). The 0216.100MXEP measures 0.236" Dia x 0.886" L (6.00mm x 22.50mm). Both fit standard 5mm x 20mm fuse holders with normal mechanical tolerance.

Q: What is the significance of the different Melting I²t values?

A: BK/S501-V-100-R has Melting I²t of 0.0018, while 0216.100MXEP has 0.0045. Both values fall within the acceptable range for 100 mA fast-blow ceramic fuses and do not affect substitution compatibility for standard circuit protection applications.

Q: Which certifications apply to my application?

A: BK/S501-V-100-R carries CSA and cULus certifications (North American focus). 0216.100MXEP carries CCC, CE, CSA, SEMKO, UR, and VDE certifications (global scope). Select based on your geographic market requirements and regulatory jurisdiction.

Q: Does operating temperature range affect substitution?

A: BK/S501-V-100-R does not specify an operating temperature range in provided data. 0216.100MXEP specifies -55°C to 125°C. For applications requiring extended temperature operation, 0216.100MXEP provides documented performance specifications.

Q: What is the difference in DC Cold Resistance?

A: BK/S501-V-100-R has 20 Ohms DC cold resistance; 0216.100MXEP has 5.7925 Ohms. This variance reflects different internal construction but does not affect circuit protection function or substitution compatibility.

Q: Are both parts currently available?

A: Yes. BK/S501-V-100-R has 646 units in stock. 0216.100MXEP has 15,426 units in stock, providing greater availability for immediate sourcing needs.

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