Equivalent & Substitute Parts for BK/C519-2A

Part Overview

The BK/C519-2A is a 2 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for 2AG holder applications with a 5mm x 15mm form factor. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility within the 2AG fuse category.

Substiute Parts

BK/C519-2A

Eaton - Electronics DivisionIn Stock: 992BK/C519-2A Datasheet

Current PartRFQ

BK/C519-2-R

Eaton - Electronics DivisionIn Stock: 1054BK/C519-2-R Datasheet

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0229002.HXP

Littelfuse Inc.In Stock: 18080229002.HXP Datasheet

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0229002.MXP

Littelfuse Inc.In Stock: 23780229002.MXP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the BK/C519-2A is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

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

Secondary Compatibility Factors:

• Breaking Capacity at Rated Voltage
• Melting I²t characteristics
• DC Cold Resistance
• Approval certifications (CSA, UL, CE, PSE)
• RoHS compliance status
• Product status (Active vs. Obsolete)

The BK/C519-2A has three identified substitutes: BK/C519-2-R (direct manufacturer equivalent), 0229002.HXP (Littelfuse), and 0229002.MXP (Littelfuse). All three maintain identical current, voltage, fuse type, response time, and 2AG package specifications.

Parameter Comparison

Engineering Selection Recommendations

BK/C519-2-R (Recommended Primary Substitute)

The BK/C519-2-R is the direct equivalent from Eaton - Electronics Division. This part maintains identical electrical parameters (2 A, 250 V AC, 100 A breaking capacity, 60.256 Melting I²t) and mechanical specifications (2AG, 5mm x 15mm). The primary advantage is active product status and ROHS3 compliance, addressing the obsolescence of the original BK/C519-2A. Both parts share identical CSA and UL approvals.

0229002.HXP and 0229002.MXP (Alternative Substitutes)

The Littelfuse parts 0229002.HXP and 0229002.MXP are functionally equivalent across all critical parameters: 2 A current rating, 250 V AC voltage, slow-blow response, and 2AG package form factor. These parts provide additional certifications (CE, PSE) and an extended operating temperature range (-55°C ~ 125°C). However, they exhibit lower breaking capacity (35 A AC versus 100 A) and lower melting I²t (30 versus 60.256), which may affect performance in high-fault-current applications. The Littelfuse parts also specify 125 V DC rating, providing additional DC application flexibility not documented for the Eaton parts.

Selection Basis:

• For direct replacement with identical electrical performance: BK/C519-2-R
• For applications requiring extended temperature range and additional certifications: 0229002.HXP or 0229002.MXP
• All three substitutes are mechanically compatible with 2AG holders and electrically compatible with 250 V AC circuits rated for 2 A protection

Frequently Asked Questions (FAQ)

Q: Can BK/C519-2-R be used as a direct replacement for BK/C519-2A?

A: Yes. The BK/C519-2-R maintains identical electrical specifications (2 A, 250 V AC, 100 A breaking capacity, 60.256 Melting I²t) and mechanical form factor (2AG, 5mm x 15mm). Both parts require the same holder type and are approved by CSA and UL. The primary difference is product status: BK/C519-2-R is active and ROHS3 compliant, while BK/C519-2A is obsolete and RoHS non-compliant.

Q: What are the differences between the Eaton BK/C519-2-R and Littelfuse 0229002.HXP/0229002.MXP?

A: All three parts share identical current rating (2 A), AC voltage rating (250 V), fuse type (cartridge glass), response time (slow blow), and 2AG package specification. The Littelfuse parts differ in breaking capacity (35 A AC versus 100 A), melting I²t (30 versus 60.256), and include a 125 V DC rating. Littelfuse parts also provide extended operating temperature range (-55°C ~ 125°C) and additional certifications (CE, PSE).

Q: Are the physical dimensions identical across all three substitutes?

A: The Eaton parts (BK/C519-2A and BK/C519-2-R) are specified as 0.205" Dia x 0.571" L (5.20mm x 14.50mm). The Littelfuse parts (0229002.HXP and 0229002.MXP) are specified as 0.177" Dia x 0.570" L (4.50mm x 14.48mm). Both dimensions are within the 2AG standard specification and are mechanically compatible with 2AG holders. Minor diameter variation reflects manufacturing tolerance within the 2AG category.

Q: Which substitute should be selected for high-fault-current applications?

A: The BK/C519-2-R maintains the original breaking capacity of 100 A at rated voltage, matching the BK/C519-2A specification. The Littelfuse parts (0229002.HXP and 0229002.MXP) specify 35 A AC breaking capacity, which is lower. For applications requiring 100 A breaking capacity, BK/C519-2-R is the appropriate selection.

Q: Do the Littelfuse parts provide DC protection capability?

A: Yes. The 0229002.HXP and 0229002.MXP are rated for 125 V DC, whereas the Eaton parts do not specify a DC voltage rating. If DC circuit protection is required, the Littelfuse parts provide documented DC capability. The Littelfuse parts also specify 10 kA DC breaking capacity.

Q: Are all substitutes RoHS compliant?

A: The BK/C519-2-R and both Littelfuse parts (0229002.HXP and 0229002.MXP) are ROHS3 compliant. The original BK/C519-2A is RoHS non-compliant. For applications requiring RoHS compliance, any of the three substitutes are acceptable.

Q: What certifications apply to each part?

A: BK/C519-2A and BK/C519-2-R are approved by CSA and UL. The Littelfuse parts (0229002.HXP and 0229002.MXP) are approved by CE, CSA, PSE, and UL, providing broader international certification coverage.