BK/C515-2A Equivalent & Substitute Parts

Part Overview

The BK/C515-2A is a 2 A 250 V AC DC fuse cartridge manufactured by Eaton - Electronics Division. This component is classified as Obsolete, indicating discontinuation from the manufacturer's active product line. The fuse features a glass cartridge design with 2AG form factor (5mm x 15mm axial configuration) and slow-blow response characteristics. Due to its obsolete status, equivalent and substitute parts from active product lines are necessary for ongoing system maintenance and new design implementations.

Substiute Parts

BK/C515-2A

Eaton - Electronics DivisionIn Stock: 889BK/C515-2A Datasheet

Current PartRFQ

BK/C515-2-R

Eaton - Electronics DivisionIn Stock: 943BK/C515-2-R Datasheet

DirectRFQ

BK/C515S-2-R

Eaton - Electronics DivisionIn Stock: 874BK/C515S-2-R Datasheet

Parametric EquivalentRFQ

0230002.DRT1P

Littelfuse Inc.In Stock: 39730230002.DRT1P Datasheet

SimilarRFQ

0230002.DRT2P

Littelfuse Inc.In Stock: 10460230002.DRT2P Datasheet

SimilarRFQ

0230002.DRT3P

Littelfuse Inc.In Stock: 14980230002.DRT3P Datasheet

SimilarRFQ

0230002.MXP

Littelfuse Inc.In Stock: 344910230002.MXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/C515-2A are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Eaton C515 Series - Active Status)

BK/C515-2-R and BK/C515S-2-R are direct equivalents from Eaton's active product line. These parts maintain identical electrical specifications: 2 A current rating, 250 V AC voltage rating, slow-blow response, 2AG form factor, 100A breaking capacity, and 60.256 melting I²t. Both are RoHS Compliant (unlike the obsolete BK/C515-2A which is RoHS non-compliant) and carry the same CSA and UL approvals. The primary distinction is packaging: BK/C515-2-R is supplied in Bulk, while BK/C515S-2-R is also supplied in Bulk. Both maintain identical mechanical dimensions and electrical performance.

Similar Substitutes (Littelfuse 230 Series - Parametric Equivalents)

The Littelfuse parts (0230002.DRT1P, 0230002.DRT2P, 0230002.DRT3P, and 0230002.MXP) are parametric equivalents with the same 2 A current rating and 250 V AC voltage rating. These parts share the slow-blow response characteristic and through-hole mounting type. However, they differ in the following parameters:

• Physical Dimensions: 0.177" Dia x 0.571" L (4.50mm x 14.50mm) versus 0.217" Dia x 0.598" L (5.50mm x 15.20mm)
• Package / Case Classification: Cartridge, Non-Standard (Axial) versus 2AG standard
• Breaking Capacity: 35A AC, 10kA DC versus 100A
• Melting I²t: 30 versus 60.256
• DC Voltage Rating: 125 V DC (specified) versus unspecified for BK/C515-2A
• Operating Temperature Range: -55°C ~ 125°C (specified) versus unspecified
• DC Cold Resistance: 0.0698 Ohms versus 0.059 Ohms
• Compliance: ROHS3 Compliant, CE/PSE/UL approved versus CSA/UL only

These differences indicate that Littelfuse parts are suitable only when mechanical form factor variation is acceptable and lower breaking capacity is sufficient for the application.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended Primary Option)

BK/C515-2-R and BK/C515S-2-R are the preferred substitutes for BK/C515-2A. Both parts maintain identical electrical specifications, mechanical form factor, and dimensional compatibility. The transition from obsolete to active product status ensures long-term supply availability. Both direct equivalents are RoHS Compliant, providing environmental compliance advantages over the original part. CSA and UL approvals are maintained across all three Eaton parts, ensuring regulatory continuity. The choice between BK/C515-2-R and BK/C515S-2-R depends solely on packaging requirements (both supplied in Bulk).

For Alternative Substitution (Conditional Use)

The Littelfuse 230 series parts (0230002.DRT1P, 0230002.DRT2P, 0230002.DRT3P, 0230002.MXP) are suitable substitutes only when the following conditions are met:

1. Mechanical form factor variation is acceptable within the application's physical constraints
2. Lower breaking capacity (35A AC versus 100A) is sufficient for the circuit protection requirements
3. Reduced melting I²t value (30 versus 60.256) aligns with the thermal protection strategy
4. The application can accommodate the smaller physical dimensions (0.177" Dia x 0.571" L)
5. DC voltage rating of 125 V is adequate for the application

Littelfuse parts provide expanded regulatory approvals (CE, PSE in addition to CSA, UL) and specified operating temperature range (-55°C ~ 125°C), which may be advantageous in specific applications. The 0230002.MXP variant offers the highest inventory availability (34,412 pieces).

Frequently Asked Questions (FAQ)

Q: Can BK/C515-2-R directly replace BK/C515-2A without any modifications?

A: Yes. BK/C515-2-R is a direct equivalent with identical electrical specifications (2 A, 250 V AC, slow-blow), mechanical form factor (2AG, 5mm x 15mm), and dimensional compatibility (0.217" Dia x 0.598" L). No circuit modifications or mechanical adjustments are required. The part is sourced from the same manufacturer (Eaton) and maintains the same regulatory approvals (CSA, UL).

Q: What is the difference between BK/C515-2-R and BK/C515S-2-R?

A: Both parts are electrically and mechanically identical. The primary difference is the product designation within Eaton's C515 series. Both maintain 2 A current rating, 250 V AC voltage rating, 100A breaking capacity, 60.256 melting I²t, and identical physical dimensions. Both are supplied in Bulk packaging and are RoHS Compliant. Selection between these two parts should be based on part number availability and internal design documentation requirements.

Q: Why do Littelfuse parts have different physical dimensions?

A: Littelfuse 230 series parts use a non-standard cartridge form factor (0.177" Dia x 0.571" L) compared to the standard 2AG form factor (0.217" Dia x 0.598" L) of Eaton parts. This dimensional difference reflects different design standards between manufacturers. Littelfuse parts are suitable only when the application's mechanical design can accommodate the smaller cartridge size and when the lower breaking capacity (35A AC) is acceptable.

Q: Are Littelfuse parts fully compatible with circuits designed for BK/C515-2A?

A: Littelfuse parts share the same 2 A current rating and 250 V AC voltage rating, making them electrically compatible for basic current protection. However, they differ in breaking capacity (35A AC versus 100A), melting I²t (30 versus 60.256), and physical dimensions. These differences mean Littelfuse parts are suitable only when the application's protection requirements align with their lower breaking capacity and when mechanical form factor variation is acceptable. Physical installation may require mechanical adaptation due to dimensional differences.

Q: What is the significance of the melting I²t difference between Eaton and Littelfuse parts?

A: Melting I²t is a thermal characteristic that determines the fuse's response to overcurrent conditions. Eaton parts (60.256) have a higher melting I²t compared to Littelfuse parts (30), indicating slower thermal response. This difference affects the fuse's ability to withstand temporary inrush currents. Applications with significant inrush current requirements should use Eaton parts to avoid nuisance fuse operation. Applications with strict thermal protection requirements may benefit from Littelfuse parts' faster response.

Q: Which substitute part offers the best long-term availability?

A: BK/C515-2-R and BK/C515S-2-R are both classified as Active products from Eaton, ensuring manufacturer support and supply continuity. Among Littelfuse alternatives, 0230002.MXP offers the highest inventory level (34,412 pieces), indicating strong market availability. For new designs, Eaton direct equivalents are recommended due to their active status and identical specifications to the obsolete BK/C515-2A.

Q: Are there any compliance differences between the substitute parts?

A: BK/C515-2-R and BK/C515S-2-R are RoHS Compliant, while the original BK/C515-2A is RoHS non-compliant. Littelfuse parts are ROHS3 Compliant. All parts maintain CSA and UL approvals. Littelfuse parts additionally carry CE and PSE approvals. For applications requiring RoHS compliance, all substitute parts meet this requirement. For applications requiring specific regional certifications (CE, PSE), Littelfuse parts provide expanded approval coverage.

Q: What packaging options are available for each substitute part?

A: BK/C515-2-R and BK/C515S-2-R are supplied in Bulk packaging. Littelfuse parts offer multiple packaging options: 0230002.DRT1P (Cut Tape), 0230002.DRT2P (Tape & Reel), 0230002.DRT3P (Tape & Reel), and 0230002.MXP (Bulk). Selection should be based on procurement volume and assembly process requirements.