BK/S501-V-5-R Ceramic Fuse 5A 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The BK/S501-V-5-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 5 amperes at 250 volts AC/DC with fast-blow response characteristics. This through-hole mounted component is designed for 5mm x 20mm axial applications and maintains active product status with 905 units currently in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, fuse type classification, and regulatory approval certifications to ensure direct functional interchangeability in circuit protection applications.

Substiute Parts

BK/S501-V-5-R

Eaton - Electronics DivisionIn Stock: 977BK/S501-V-5-R Datasheet

Current PartRFQ

0216005.MXEP

Littelfuse Inc.In Stock: 651420216005.MXEP Datasheet

SimilarRFQ

0216005.MXESPP

Littelfuse Inc.In Stock: 12310216005.MXESPP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/S501-V-5-R is determined by strict equivalence across the following parameters:

Primary Substitution Criteria:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Fast Blow (exact match required)
• Breaking Capacity @ Rated Voltage: 1.5kA (exact match required)
• Mounting Type: Through Hole (exact match required)

Secondary Compatibility Parameters:

• Package / Case: 5mm x 20mm nominal dimensions (minor dimensional variations acceptable within mechanical tolerance)
• Regulatory Approvals: Substitute parts must maintain equivalent or expanded certification coverage

The identified substitute parts 0216005.MXEP and 0216005.MXESPP (both Littelfuse Inc., Series 216 and 216SP respectively) satisfy all primary substitution criteria and maintain compatibility with the original part's electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse substitute parts (0216005.MXEP and 0216005.MXESPP) are functionally equivalent to the BK/S501-V-5-R based on matching electrical specifications and fuse characteristics. Selection between alternatives is determined by:

0216005.MXEP (Littelfuse Series 216):

• Expanded regulatory approval coverage including CE, KC, PSE, and UR certifications
• Operating temperature range: -55°C ~ 125°C
• Inventory availability: 65,100 units
• Dimensional tolerance: 5.80mm diameter x 22.50mm length

0216005.MXESPP (Littelfuse Series 216SP):

• Compact form factor: 5.20mm diameter x 20.00mm length (closest to original BK/S501-V-5-R dimensions)
• Regulatory approvals: CE, CSA, CQC, KC, PSE, UR, VDE
• Operating temperature range: -55°C ~ 125°C
• Inventory availability: 1,200 units
• REACH Unaffected status

Both parts maintain active product status and RoHS3 compliance. Selection should be based on mechanical fit requirements within the target application's fuse holder and regulatory certification requirements for the end-use market.

Frequently Asked Questions (FAQ)

Q: Can 0216005.MXEP and 0216005.MXESPP be used interchangeably with BK/S501-V-5-R?

A: Both Littelfuse parts are electrically equivalent substitutes. They share identical current ratings (5A), voltage ratings (250V AC), fuse type (ceramic cartridge), response time (fast blow), and breaking capacity (1.5kA). Interchangeability depends on mechanical fit within the fuse holder. The 0216005.MXESPP has dimensions closest to the original part (5.20mm x 20.00mm).

Q: What are the key differences between the two Littelfuse substitutes?

A: The primary difference is physical dimension. The 0216005.MXESPP (5.20mm x 20.00mm) matches the original BK/S501-V-5-R dimensions more closely than the 0216005.MXEP (5.80mm x 22.50mm). Both have identical electrical ratings and operating temperature ranges (-55°C ~ 125°C). Regulatory certifications differ slightly, with 0216005.MXESPP including CQC approval.

Q: Are there any resistance or thermal characteristics that differ between these parts?

A: DC cold resistance values are comparable: BK/S501-V-5-R at 0.019 ohms versus both Littelfuse parts at 0.0183 ohms. Melting I²t values differ slightly: BK/S501-V-5-R at 25 versus Littelfuse parts at 27.46. These minor variations remain within acceptable substitution parameters for ceramic cartridge fuses in this rating class.

Q: Which substitute should be selected for space-constrained applications?

A: The 0216005.MXESPP is recommended for applications with strict dimensional constraints, as its 5.20mm x 20.00mm form factor most closely matches the original BK/S501-V-5-R specifications.

Q: Do all three parts have equivalent regulatory approvals?

A: No. The BK/S501-V-5-R carries BSI, CCC, CSA, cULus, IMQ, MITI/JET, SEMKO, and VDE approvals. The 0216005.MXEP includes BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE. The 0216005.MXESPP includes CE, CSA, CQC, KC, PSE, UR, and VDE. Application requirements should determine which certification set is necessary.