Equivalent & Substitute Parts for BK-S505SC-2-R

Part Overview

The BK-S505SC-2-R is a ceramic cartridge fuse manufactured by Eaton - Electronics Division, rated for 2A at 250VAC with a 5mm x 20mm axial form factor. This fuse is designed for through-hole mounting applications requiring slow-blow response characteristics. The part is currently active in production with 1,037 pieces in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to supply constraints, design flexibility, or application-specific certification requirements.

Substiute Parts

BK-S505SC-2-R

Eaton - Electronics DivisionIn Stock: 1119BK-S505SC-2-R Datasheet

Current PartRFQ

0215002.MXESPP

Littelfuse Inc.In Stock: 31300215002.MXESPP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK-S505SC-2-R is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be 2 A
• Voltage Rating (AC): Must be 250 V
• Fuse Type: Must be Cartridge, Ceramic
• Package / Case: Must be 5mm x 20mm (Axial)
• Mounting Type: Must be Through Hole
• Response Time: Must be Slow Blow
• Breaking Capacity @ Rated Voltage: Must be 1.5kA

The substitute part 0215002.MXESPP from Littelfuse Inc. meets all these criteria and is therefore classified as a parametric equivalent. Both parts share identical electrical ratings, mechanical dimensions, and functional characteristics required for direct substitution in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the BK-S505SC-2-R and 0215002.MXESPP are active production parts with equivalent electrical and mechanical specifications. Selection between these parts should be based on the following factors:

Certification Requirements: The BK-S505SC-2-R carries approvals from BSI, CCC/CQC, CSA, cURus, IMQ, KC, PSE/JET, SEMKO, and VDE. The 0215002.MXESPP carries approvals from CE, CQC, CSA, KC, PSE, UR, and VDE. Applications requiring specific regional certifications should reference the approval agency list for each part.

Operating Temperature Range: The 0215002.MXESPP specifies an operating temperature range of -55°C to 125°C. The BK-S505SC-2-R does not specify an operating temperature range in the provided data. Applications with defined temperature requirements should consider this specification.

Inventory Availability: The BK-S505SC-2-R has 1,037 pieces in stock, while the 0215002.MXESPP has 3,100 pieces in stock. Supply chain considerations may influence part selection.

Resistance and Melting Characteristics: Minor variations exist in DC cold resistance (0.0545 Ohms vs. 0.0566 Ohms) and melting I²t values (9.6 vs. 11.68). These differences are within acceptable tolerances for ceramic cartridge fuses of this rating class and do not preclude substitution.

Frequently Asked Questions (FAQ)

Q: Can the 0215002.MXESPP be used as a direct replacement for the BK-S505SC-2-R?

A: Yes. Both parts are rated for 2A at 250VAC, feature identical 5mm x 20mm ceramic cartridge construction, and share the same 1.5kA breaking capacity and slow-blow response characteristics. They are mechanically and electrically interchangeable for through-hole mounting applications.

Q: What are the key differences between these two fuses?

A: The primary differences are manufacturer identity, certification agency approvals, operating temperature specification, and minor variations in DC cold resistance and melting I²t values. The 0215002.MXESPP specifies an operating temperature range of -55°C to 125°C, while the BK-S505SC-2-R does not provide this specification. The melting I²t values differ slightly (9.6 vs. 11.68), which reflects normal manufacturing variation within the ceramic fuse category.

Q: Are there any compatibility concerns with the 5mm x 20mm package?

A: No. Both parts share identical physical dimensions of 0.205" diameter by 0.787" length (5.20mm x 20.00mm). They are compatible with standard 5x20mm fuse holders and clips used in through-hole circuit board designs.

Q: Which certifications apply to my application?

A: The BK-S505SC-2-R holds certifications from BSI, CCC/CQC, CSA, cURus, IMQ, KC, PSE/JET, SEMKO, and VDE. The 0215002.MXESPP holds certifications from CE, CQC, CSA, KC, PSE, UR, and VDE. Verify that the selected part carries the required certification for your target market or application standard.

Q: Does the difference in melting I²t affect substitution?

A: No. The melting I²t values of 9.6 and 11.68 represent normal variation within ceramic fuse manufacturing tolerances. Both values are consistent with 2A slow-blow fuses in the 5x20mm package class and do not affect functional equivalence or substitutability.

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

A: The DC cold resistance values (0.0545 Ohms vs. 0.0566 Ohms) are within acceptable tolerance for ceramic cartridge fuses. These minor differences do not impact circuit protection performance or substitution eligibility.