BKS-S505-V-12-R Equivalent & Substitute Parts

Part Overview

The BKS-S505-V-12-R is a 12 A, 250 V AC/DC ceramic cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Eaton - Electronics Division. This component is classified as obsolete, making identification of functionally equivalent substitutes necessary for ongoing maintenance, repair, and new design applications where legacy component specifications must be maintained.

Substiute Parts

BKS-S505-V-12-R

Eaton - Electronics DivisionIn Stock: 1202BKS-S505-V-12-R Datasheet

Current PartRFQ

0215012.MXEP

LittelfuseIn Stock: 22520215012.MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BKS-S505-V-12-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 12 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)

The substitute part 0215012.MXEP (Littelfuse Series 215) meets all critical electrical and mechanical parameters. Secondary parameters such as breaking capacity, melting I²t, DC cold resistance, and approval agency certifications may vary within acceptable engineering tolerances for the application category.

Parameter Comparison

Engineering Selection Recommendations

The 0215012.MXEP (Littelfuse Series 215) is a direct functional equivalent to the BKS-S505-V-12-R. Both components share identical electrical ratings (12 A, 250 V AC/DC), fuse type (ceramic cartridge), package form factor (5mm x 20mm axial), and response characteristic (slow blow).

The Littelfuse substitute offers the following advantages:

• Active Product Status: The 0215012.MXEP is an active product with confirmed inventory availability (2200 pcs), whereas the BKS-S505-V-12-R is obsolete.
• Enhanced Approval Coverage: The substitute carries CE, CSA, PSE, SEMKO, UL, and VDE certifications, providing broader regulatory compliance compared to the original part's cURus and VDE certifications.
• Improved Breaking Capacity: The substitute provides 1.5 kA breaking capacity versus 1 kA for the original, offering enhanced fault protection capability.
• RoHS3 Compliance: The substitute meets ROHS3 requirements, supporting modern environmental and regulatory standards.
• Specified Operating Temperature Range: The substitute defines an operating temperature range of -55°C to 125°C, providing clarity for temperature-dependent applications.

Selection of the 0215012.MXEP is appropriate for direct replacement in applications where the BKS-S505-V-12-R was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the 0215012.MXEP be used as a direct replacement for the BKS-S505-V-12-R?

A: Yes. Both components meet identical specifications for current rating (12 A), voltage rating (250 V AC), fuse type (ceramic cartridge), package form factor (5mm x 20mm axial), response time (slow blow), and mounting type (through hole). The substitute is electrically and mechanically compatible.

Q: What is the difference in breaking capacity between the two parts?

A: The BKS-S505-V-12-R has a breaking capacity of 1 kA at rated voltage, while the 0215012.MXEP has a breaking capacity of 1.5 kA. The higher breaking capacity of the substitute provides enhanced fault protection without affecting normal operation.

Q: Are there differences in approval certifications?

A: Yes. The BKS-S505-V-12-R carries cURus and VDE certifications. The 0215012.MXEP carries CE, CSA, PSE, SEMKO, UL, and VDE certifications. Both include VDE approval. The substitute's broader certification portfolio supports compliance in additional regulatory jurisdictions.

Q: Does the substitute meet RoHS requirements?

A: Yes. The 0215012.MXEP is ROHS3 compliant. The original part's RoHS status is not specified in the available documentation.

Q: Are the physical dimensions identical?

A: Both components use the 5mm x 20mm (axial) package form factor. The BKS-S505-V-12-R measures 0.218" Dia x 0.831" L (5.54mm x 21.10mm). The 0215012.MXEP measures 0.228" Dia x 0.886" L (5.80mm x 22.50mm). These minor dimensional variations remain within the 5mm x 20mm package specification and do not affect through-hole mounting compatibility.

Q: What is the difference in melting I²t values?

A: The BKS-S505-V-12-R has a melting I²t of 713.7, while the 0215012.MXEP has a melting I²t of 515.5. Both components share the same slow-blow response characteristic. The difference reflects manufacturing variations between suppliers and does not affect functional equivalence for standard circuit protection applications.

Q: Is the substitute part currently available?

A: Yes. The 0215012.MXEP is an active product with 2200 pcs in stock, whereas the BKS-S505-V-12-R is obsolete with limited availability.