BK/S501-V-4-R Equivalent & Substitute Parts

Part Overview

The BK/S501-V-4-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 4 A at 250 V AC/DC with fast-blow response characteristics. This through-hole component is housed in a 5mm x 20mm axial package and is designed for general-purpose circuit protection applications. The product maintains active status with full RoHS compliance and broad international approval certifications. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and functional performance parameters align with the original specification, enabling direct replacement in existing designs and procurement scenarios.

Substiute Parts

BK/S501-V-4-R

Eaton - Electronics DivisionIn Stock: 1174BK/S501-V-4-R Datasheet

Current PartRFQ

0216004.MXEP

Littelfuse Inc.In Stock: 28460216004.MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S501-V-4-R is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Current Rating: 4 A (exact match)
• Voltage Rating (AC): 250 V (exact match)
• Response Time: Fast Blow (exact match)
• Breaking Capacity @ Rated Voltage: 1.5 kA (exact match)

Mechanical Equivalence Requirements:

• Fuse Type: Cartridge, Ceramic (exact match)
• Package / Case: 5mm x 20mm (Axial) (exact match)
• Mounting Type: Through Hole (exact match)

Compliance Requirements:

• RoHS Status: RoHS Compliant or equivalent regulatory compliance
• Product Status: Active

The substitute part 0216004.MXEP from Littelfuse Inc. satisfies all electrical and mechanical equivalence criteria, enabling direct functional replacement in circuit protection applications where the BK/S501-V-4-R is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the BK/S501-V-4-R and 0216004.MXEP are active-status products with full RoHS compliance and international regulatory approvals suitable for circuit protection applications. The BK/S501-V-4-R carries approvals from BSI, CCC, CSA, cULus, IMQ, MITI/JET, SEMKO, and VDE. The 0216004.MXEP carries approvals from CCC, CE, CSA, KC, PSE, SEMKO, UL, and VDE.

Selection between these parts is based on:

Approval Agency Alignment: Verify that the substitute part's certification portfolio (CCC, CE, CSA, KC, PSE, SEMKO, UL, VDE) aligns with the target application's regulatory requirements. The BK/S501-V-4-R includes cULus and MITI/JET certifications; the 0216004.MXEP includes CE and PSE certifications.

Dimensional Tolerance: The 0216004.MXEP exhibits slightly larger physical dimensions (5.80mm diameter vs. 5.54mm, 22.50mm length vs. 21.10mm). Verify mechanical fit within the target PCB footprint and fuse holder cavity.

Thermal Operating Range: The 0216004.MXEP specifies an operating temperature range of -55°C to 125°C, whereas the BK/S501-V-4-R does not provide this specification. Applications requiring defined thermal performance should reference the Littelfuse part's documented range.

Electrical Performance Variance: The melting I²t value for 0216004.MXEP (14.995) is marginally higher than the BK/S501-V-4-R (14), and DC cold resistance is slightly lower (0.0247 Ohms vs. 0.027 Ohms). These minor variations remain within acceptable tolerance for equivalent fast-blow ceramic fuse performance.

Frequently Asked Questions (FAQ)

Q: Can the 0216004.MXEP directly replace the BK/S501-V-4-R in existing designs?

A: Yes, the 0216004.MXEP is electrically and mechanically equivalent across all critical parameters: 4 A current rating, 250 V AC voltage rating, fast-blow response, 1.5 kA breaking capacity, and 5mm x 20mm axial package. Both are through-hole ceramic cartridge fuses with active product status and RoHS compliance. Verify that the slightly larger physical dimensions (5.80mm diameter, 22.50mm length) accommodate the existing fuse holder cavity.

Q: What are the key electrical parameters that determine fuse substitution?

A: Substitution requires exact equivalence in current rating (4 A), voltage rating (250 V AC), response time (fast blow), breaking capacity (1.5 kA), and melting I²t value. The BK/S501-V-4-R and 0216004.MXEP both meet these criteria, with the Littelfuse part showing a melting I²t of 14.995 compared to 14 for the Eaton part—a negligible variance for fast-blow fuse applications.

Q: Are there dimensional differences between these parts?

A: Yes. The BK/S501-V-4-R measures 0.218" diameter x 0.831" length (5.54mm x 21.10mm), while the 0216004.MXEP measures 0.228" diameter x 0.886" length (5.80mm x 22.50mm). Both conform to the 5mm x 20mm axial package classification, but the Littelfuse part is slightly larger. Confirm mechanical fit within the target fuse holder before substitution.

Q: Which certifications should I prioritize when selecting between these parts?

A: Selection depends on the target application's regulatory jurisdiction. The BK/S501-V-4-R includes cULus and MITI/JET approvals, suitable for North American and Japanese markets. The 0216004.MXEP includes CE and PSE certifications, suitable for European and Asian markets. Both parts carry CSA, CCC, SEMKO, and VDE approvals. Verify that the substitute part's certification portfolio matches your application's compliance requirements.

Q: What is the significance of the DC cold resistance difference?

A: The BK/S501-V-4-R has a DC cold resistance of 0.027 Ohms, while the 0216004.MXEP has 0.0247 Ohms. This minor difference (approximately 8.5% lower in the Littelfuse part) does not affect functional equivalence for circuit protection applications and remains within acceptable tolerance for ceramic cartridge fuse performance.

Q: Does the 0216004.MXEP provide thermal operating specifications?

A: Yes. The 0216004.MXEP specifies an operating temperature range of -55°C to 125°C. The BK/S501-V-4-R does not provide this specification in the available data. Applications requiring defined thermal performance parameters should reference the Littelfuse part's documented operating range.