Equivalent & Substitute Parts for BK/C519-2.25-R

Part Overview

The BK/C519-2.25-R is a 2.25 A, 250 V AC glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for general-purpose circuit protection in AC applications and requires a 2AG fuse holder for installation. The part is currently active in production with 941 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

BK/C519-2.25-R

Eaton - Electronics DivisionIn Stock: 1025BK/C519-2.25-R Datasheet

Current PartRFQ

02292.25HXP

Littelfuse Inc.In Stock: 110002292.25HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/C519-2.25-R with the Littelfuse 02292.25HXP is permissible based on the following alignment of critical parameters:

Matching Parameters:

• Current Rating: Both parts rated at 2.25 A
• Voltage Rating - AC: Both parts rated at 250 V AC
• Fuse Type: Both are cartridge, glass construction
• Package / Case: Both use 2AG, 5mm x 15mm form factor
• Response Time: Both are slow blow fuses
• Mounting Type: Both require a 2AG fuse holder
• DC Cold Resistance: 0.057 Ohms (Eaton) vs. 0.0567 Ohms (Littelfuse) — within tolerance
• RoHS Compliance: Both are RoHS compliant

Differing Parameters: The Littelfuse substitute includes a DC voltage rating of 125 V, whereas the Eaton part specifies AC/DC operation without explicit DC rating. The Littelfuse part has a lower breaking capacity at rated voltage (35 A AC, 10 kA DC) compared to the Eaton part (100 A). These differences do not preclude substitution in AC-only applications where the 250 V AC rating is the primary design criterion.

Parameter Comparison

Engineering Selection Recommendations

For AC-Only Applications (250 V AC): The Littelfuse 02292.25HXP is a direct substitute for the Eaton BK/C519-2.25-R. Both parts share identical current and AC voltage ratings, fuse type, package form factor, and response characteristics. Both hold CSA and UL approvals, meeting standard regulatory requirements. The Littelfuse part carries additional certifications (CE, PSE) and specifies an operating temperature range, providing broader compliance documentation.

Consideration of Breaking Capacity: The Eaton part specifies 100 A breaking capacity at rated voltage, while the Littelfuse part specifies 35 A AC. In applications where breaking capacity is a design constraint, the Eaton part provides higher fault current handling. However, for standard circuit protection applications, both parts are suitable.

Consideration of Melting I²t: The Eaton part has a melting I²t of 97.724 compared to the Littelfuse part at 39. This difference reflects different thermal response characteristics. Selection should align with circuit protection requirements.

Inventory and Availability: Eaton BK/C519-2.25-R: 941 units in stock. Littelfuse 02292.25HXP: 1010 units in stock. Both parts are in active production status.

Frequently Asked Questions (FAQ)

Q: Can the Littelfuse 02292.25HXP replace the Eaton BK/C519-2.25-R in all applications?

A: Substitution is valid for AC applications at 250 V with a 2.25 A load. Both parts are mechanically and electrically compatible in 2AG fuse holders. If the application requires DC operation or specific breaking capacity above 35 A AC, verify compatibility with circuit requirements before substitution.

Q: What is the significance of the different breaking capacities?

A: Breaking capacity indicates the maximum fault current a fuse can safely interrupt. The Eaton part (100 A) handles higher fault currents than the Littelfuse part (35 A AC). For standard low-fault-current circuits, both are adequate. For high-fault-current circuits, the Eaton part is preferred.

Q: Are both parts physically interchangeable in a 2AG fuse holder?

A: Yes. Both parts use the 2AG, 5mm x 15mm package specification. Physical dimensions are nearly identical (Eaton: 5.20mm x 14.50mm; Littelfuse: 4.50mm x 14.48mm), permitting installation in standard 2AG holders without modification.

Q: What certifications apply to each part?

A: Eaton BK/C519-2.25-R holds CSA and UL approvals. Littelfuse 02292.25HXP holds CE, CSA, PSE, and UL approvals. Both meet North American and international safety standards. The Littelfuse part carries additional regional certifications.

Q: Does the Littelfuse part's DC voltage rating affect AC-only applications?

A: No. The presence of a 125 V DC rating on the Littelfuse part does not impact AC performance. The 250 V AC rating is the controlling specification for AC circuits. The DC rating provides additional flexibility for dual-voltage applications.

Q: How do the melting I²t values affect fuse selection?

A: Melting I²t determines the thermal energy required to melt the fuse element. The Eaton part (97.724) requires more thermal energy than the Littelfuse part (39), resulting in different response times under overload conditions. Selection depends on circuit protection coordination requirements.