BK/S500-V-8-R Equivalent & Substitute Parts

Part Overview

The BK/S500-V-8-R is an 8 A, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial through-hole package. Manufactured by Eaton - Electronics Division, this component is classified as Active product status with 1016 units in current inventory. Glass cartridge fuses of this specification are used in power distribution, circuit protection, and industrial control applications where fast-response overcurrent protection is required. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and component availability across multiple sourcing channels.

Substiute Parts

BK/S500-V-8-R

Eaton - Electronics DivisionIn Stock: 1108BK/S500-V-8-R Datasheet

Current PartRFQ

0217008.MXEP

Littelfuse Inc.In Stock: 20880217008.MXEP Datasheet

DirectRFQ

5SFP 8-R

Bel Fuse Inc.In Stock: 28835SFP 8-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/S500-V-8-R are classified based on strict electrical and mechanical parameter alignment. The substitution logic is determined by the following mandatory criteria:

Primary Substitution Criteria:

• Current Rating: 8 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Fast Blow (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 80 A (exact match required)

All substitute parts listed below meet these seven mandatory parameters without exception. Substitutes are grouped as Direct Manufacturer Equivalents and Similar Manufacturer Equivalents based on dimensional and electrical performance alignment.

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalent: 0217008.MXEP (Littelfuse Inc.)

The 0217008.MXEP is a direct functional equivalent to the BK/S500-V-8-R. Both components share identical electrical specifications (8 A, 250 V AC, fast-blow response, 80 A breaking capacity) and package classification (5mm x 20mm axial through-hole). The Littelfuse part carries ROHS3 compliance and holds broader regulatory approvals including BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. Operating temperature range is specified as -55°C to 125°C. Inventory availability is 2000 units. DC cold resistance is 0.0068 Ohms, which is lower than the Eaton part. Dimensional variance is within acceptable tolerance for through-hole cartridge fuse applications.

Similar Manufacturer Equivalent: 5SFP 8-R (Bel Fuse Inc.)

The 5SFP 8-R meets all seven mandatory substitution criteria and is classified as a similar manufacturer equivalent. This component shares identical electrical ratings (8 A, 250 V AC, fast-blow, 80 A breaking capacity) and package specification (5mm x 20mm axial through-hole). The Bel Fuse part carries ROHS3 compliance with regulatory approvals from CE, CSA, and cULus. Operating temperature range is -55°C to 125°C. Inventory availability is 2809 units. DC cold resistance is 0.007 Ohms. Dimensional specifications are 0.217" Dia x 0.827" L (5.50mm x 21.00mm), which closely aligns with the Eaton reference part at 5.54mm x 21.10mm.

Both substitute parts are Active status components suitable for direct replacement in applications requiring 8 A, 250 V AC/DC fast-blow glass cartridge fuse protection.

Frequently Asked Questions (FAQ)

Q: What determines if a fuse can substitute for the BK/S500-V-8-R?

A: Substitution is determined by seven mandatory parameters: current rating (8 A), voltage rating (250 V AC), response time (fast blow), fuse type (cartridge glass), package (5mm x 20mm axial), mounting type (through hole), and breaking capacity (80 A). All listed substitutes meet these criteria exactly.

Q: Are there dimensional differences between the BK/S500-V-8-R and its substitutes?

A: Yes. The BK/S500-V-8-R measures 0.218" Dia x 0.831" L (5.54mm x 21.10mm). The 0217008.MXEP measures 0.228" Dia x 0.886" L (5.80mm x 22.50mm). The 5SFP 8-R measures 0.217" Dia x 0.827" L (5.50mm x 21.00mm). These variations are within acceptable tolerance for through-hole cartridge fuse applications and do not affect electrical performance or circuit board compatibility.

Q: What is the difference in DC cold resistance between these parts?

A: The BK/S500-V-8-R has 0.01 Ohms DC cold resistance. The 0217008.MXEP has 0.0068 Ohms. The 5SFP 8-R has 0.007 Ohms. Lower resistance values indicate reduced voltage drop under normal operation. All values are within acceptable ranges for 8 A cartridge fuse applications.

Q: Which substitute has the broadest regulatory approvals?

A: The 0217008.MXEP (Littelfuse) carries approvals from BSI, CE, CCC, CSA, KC, PSE, SEMKO, UR, and VDE. The 5SFP 8-R (Bel Fuse) carries approvals from CE, CSA, and cULus. The BK/S500-V-8-R (Eaton) carries approvals from BSI, CSA, cULus, SEMKO, and VDE. Selection should be based on specific regulatory requirements for your application.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BK/S500-V-8-R is RoHS Compliant. Both 0217008.MXEP and 5SFP 8-R are ROHS3 Compliant. All three parts meet RoHS requirements.

Q: What are the operating temperature ranges?

A: The BK/S500-V-8-R does not specify an operating temperature range. The 0217008.MXEP operates from -55°C to 125°C. The 5SFP 8-R operates from -55°C to 125°C. Both substitutes provide extended temperature specifications suitable for industrial and harsh environment applications.

Q: Can I use these substitutes interchangeably in my circuit?

A: Yes, provided your circuit board layout accommodates the dimensional variations noted above. All three parts are through-hole mounted 5mm x 20mm axial cartridge fuses with identical electrical specifications (8 A, 250 V AC, fast-blow, 80 A breaking capacity). Verify physical fit in your fuse holder before installation.