Equivalent & Substitute Parts for BK/C518-3.5-R

Part Overview

The BK/C518-3.5-R is a 3.5 A 250 V AC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This through-hole component is housed in a 2AG package with dimensions of 5mm x 15mm (axial configuration). The part maintains active product status with 1047 units in current inventory.

Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and package specifications align with the main part's functional requirements. The following alternatives maintain compatibility with applications designed for the BK/C518-3.5-R.

Substiute Parts

BK/C518-3.5-R

Eaton - Electronics DivisionIn Stock: 1115BK/C518-3.5-R Datasheet

Current PartRFQ

022403.5HXP

Littelfuse Inc.In Stock: 841022403.5HXP Datasheet

SimilarRFQ

022403.5MXP

Littelfuse Inc.In Stock: 1819022403.5MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/C518-3.5-R are qualified based on the following criteria:

Electrical Compatibility:

• Current rating of 3.5 A
• AC voltage rating of 250 V
• Fast-blow response time characteristic
• Breaking capacity of 100 A at rated voltage

Mechanical Compatibility:

• 2AG package designation
• 5mm x 15mm (axial) physical dimensions
• Through-hole mounting configuration
• Glass cartridge fuse type

The substitute parts 022403.5HXP and 022403.5MXP (both Littelfuse Inc., Series 224) satisfy all electrical and mechanical compatibility requirements. Both parts are manufactured by Littelfuse Inc. and maintain active product status with substantial inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both Littelfuse substitute parts (022403.5HXP and 022403.5MXP) are qualified replacements for the BK/C518-3.5-R based on matching electrical and mechanical specifications. Selection between these options is determined by inventory availability and application requirements:

022403.5MXP is the preferred substitute due to highest inventory availability (1712 units) and active product status. This part maintains all required electrical ratings, package specifications, and regulatory certifications (CE, CSA, PSE, UL).

022403.5HXP serves as an alternative substitute with adequate inventory (763 units) and identical electrical and mechanical compatibility. Both Littelfuse parts provide enhanced DC voltage rating (125 V) and expanded operating temperature range (-55°C ~ 125°C) compared to the main part specification.

All three parts maintain active product status and RoHS compliance. The Littelfuse substitutes carry broader regulatory approval (CE, CSA, PSE, UL) compared to the Eaton main part (CSA, UL).

Frequently Asked Questions (FAQ)

Q: Can 022403.5HXP and 022403.5MXP be used interchangeably with BK/C518-3.5-R?

A: Yes. Both Littelfuse parts match the critical electrical parameters (3.5 A, 250 V AC, fast-blow response) and mechanical specifications (2AG package, 5mm x 15mm dimensions, through-hole mounting). Physical and electrical compatibility is confirmed.

Q: What is the difference between 022403.5HXP and 022403.5MXP?

A: Both parts are identical in electrical ratings, mechanical dimensions, and regulatory certifications. The primary difference is inventory availability: 022403.5MXP has 1712 units in stock versus 763 units for 022403.5HXP.

Q: Do the Littelfuse substitutes have different melting I²t values?

A: Yes. The Littelfuse parts (022403.5HXP and 022403.5MXP) have a melting I²t of 6.7, while the Eaton BK/C518-3.5-R has a melting I²t of 9.7. Both values fall within the fast-blow fuse category and maintain the same current rating and response time classification.

Q: Are there DC voltage considerations for substitution?

A: The BK/C518-3.5-R does not specify a DC voltage rating. The Littelfuse substitutes are rated for 125 V DC. Applications requiring DC operation should verify that 125 V DC rating is appropriate for the circuit design.

Q: What regulatory certifications apply to these parts?

A: The BK/C518-3.5-R carries CSA and UL approvals. The Littelfuse substitutes (022403.5HXP and 022403.5MXP) carry CE, CSA, PSE, and UL approvals, providing broader regulatory coverage.

Q: Are physical dimensions identical between all three parts?

A: The parts share the same 2AG package designation and 5mm x 15mm axial configuration. Measured dimensions show minor variation: BK/C518-3.5-R is 0.217" Dia x 0.598" L, while Littelfuse parts are 0.185" Dia x 0.570" L. Both sets of dimensions are within 2AG specification tolerances and are mechanically interchangeable in standard through-hole fuse holders.