BK/C518-2A Equivalent & Substitute Parts

Part Overview

The BK/C518-2A is a 2 A, 250 V AC/DC fast-blow glass cartridge fuse in 2AG package format (5mm x 15mm axial). Manufactured by Eaton - Electronics Division, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for ongoing system maintenance, repair, and new design implementations. Substitute options are available from both Eaton and Littelfuse Inc., with varying compliance certifications and packaging configurations.

Substiute Parts

BK/C518-2A

Eaton - Electronics DivisionIn Stock: 874BK/C518-2A Datasheet

Current PartRFQ

BK/C518-2-R

Eaton - Electronics DivisionIn Stock: 868BK/C518-2-R Datasheet

DirectRFQ

BK/C518S-2-R

Eaton - Electronics DivisionIn Stock: 1148BK/C518S-2-R Datasheet

Parametric EquivalentRFQ

0224002.MXP

Littelfuse Inc.In Stock: 19140224002.MXP Datasheet

DirectRFQ

0224002.VXP

Littelfuse Inc.In Stock: 9120224002.VXP Datasheet

DirectRFQ

0224002.DRT1P

Littelfuse Inc.In Stock: 12150224002.DRT1P Datasheet

SimilarRFQ

0224002.DRT2P

Littelfuse Inc.In Stock: 10770224002.DRT2P Datasheet

SimilarRFQ

0224002.DRT3P

Littelfuse Inc.In Stock: 11200224002.DRT3P Datasheet

SimilarRFQ

0224002.HXP

Littelfuse Inc.In Stock: 10630224002.HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Primary Matching Criteria:

• Current Rating: 2 A (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 2AG, 5mm x 15mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Mounting Type: Through Hole (exact match required)

Secondary Compatibility Factors:

• Breaking Capacity @ Rated Voltage: 100A minimum
• Approval Agencies: CSA and UL certifications present in all substitutes
• RoHS Compliance: Preferred for new designs; non-compliant original part

All substitute parts listed meet the primary matching criteria. Littelfuse parts provide additional DC voltage rating (125 V DC) and enhanced operating temperature range (-55°C ~ 125°C) compared to the Eaton original. Melting I²t and DC Cold Resistance values differ between manufacturers but remain within acceptable tolerance for this application category.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Eaton Ecosystem):

BK/C518-2-R and BK/C518S-2-R are direct functional equivalents to the obsolete BK/C518-2A. Both are active products from Eaton - Electronics Division with identical electrical specifications (2 A, 250 V AC, 100A breaking capacity, 1.9 melting I²t). BK/C518-2-R is available in bulk packaging, while BK/C518S-2-R offers the same specifications with higher inventory availability (1115 pcs). Both maintain CSA and UL approvals. BK/C518-2-R features RoHS compliance, addressing regulatory requirements absent in the original part.

Cross-Manufacturer Substitutes (Littelfuse):

Littelfuse 0224002 series parts (MXP, VXP, DRT1P, DRT2P, DRT3P, HXP) provide functional equivalence with enhanced specifications. All maintain 2 A, 250 V AC ratings and 2AG package format. Littelfuse parts include 125 V DC rating, extended operating temperature range (-55°C ~ 125°C), and higher DC breaking capacity (10kA DC). All Littelfuse substitutes carry CE, CSA, PSE, and UL certifications with ROHS3 compliance.

Packaging Considerations:

Bulk packaging (MXP, VXP, HXP) suits component-level replacement and repair applications. Tape & Reel packaging (DRT1P, DRT2P, DRT3P) is optimized for automated assembly and high-volume production environments.

Compliance Selection:

For applications requiring RoHS compliance, select BK/C518-2-R, BK/C518S-2-R, or any Littelfuse 0224002 series part. For applications requiring extended DC voltage capability, select Littelfuse parts exclusively.

Frequently Asked Questions (FAQ)

Q: Can BK/C518-2-R directly replace BK/C518-2A in existing designs?

A: Yes. BK/C518-2-R is a direct functional equivalent with identical current rating (2 A), voltage rating (250 V AC), package format (2AG, 5x15mm), response time (fast blow), and breaking capacity (100A). Both are through-hole mounted cartridge fuses. The primary difference is product status (active vs. obsolete) and RoHS compliance (compliant vs. non-compliant).

Q: What is the difference between Eaton and Littelfuse 2 A 250V fuses?

A: Both manufacturers provide 2 A, 250 V AC fast-blow cartridge fuses in 2AG package. Littelfuse parts add 125 V DC rating, extended operating temperature range (-55°C ~ 125°C), and higher DC breaking capacity (10kA DC). Melting I²t differs (Eaton: 1.9; Littelfuse: 1.5) and DC cold resistance is lower in Littelfuse parts (0.0497 Ω vs. 0.064 Ω). All carry CSA and UL approvals.

Q: Which packaging type should I select for board-level assembly?

A: Tape & Reel packaging (DRT1P, DRT2P, DRT3P) is standard for automated pick-and-place assembly. Bulk packaging (MXP, VXP, HXP) is suitable for manual assembly, repair, and component-level replacement.

Q: Are all listed substitutes RoHS compliant?

A: Eaton BK/C518-2-R and BK/C518S-2-R are RoHS compliant. All Littelfuse 0224002 series parts are ROHS3 compliant. The original BK/C518-2A is RoHS non-compliant.

Q: Can I use a Littelfuse part in an application originally designed for Eaton BK/C518-2A?

A: Yes. Littelfuse 0224002 series parts meet all primary matching criteria (2 A, 250 V AC, 2AG package, fast blow, through-hole mounting, 100A breaking capacity). The additional DC voltage rating and extended temperature range provide enhanced capability without compromising AC circuit protection performance.

Q: What is the significance of melting I²t values?

A: Melting I²t (1.9 for Eaton; 1.5 for Littelfuse) indicates the thermal energy required to melt the fuse element. Lower values indicate faster response to overcurrent. Both values are within acceptable range for 2 A fast-blow cartridge fuses. Selection between manufacturers should be based on circuit protection requirements and thermal characteristics of the protected circuit.

Q: Are there inventory considerations for part selection?

A: Yes. Littelfuse 0224002.MXP has the highest inventory (1830 pcs), followed by BK/C518S-2-R (1115 pcs) and 0224002.DRT3P (1050 pcs). For applications requiring immediate availability, these parts are preferred.