Equivalent & Substitute Parts for BK/C519-7A

Part Overview

The BK/C519-7A is a 7 A, 125 V AC/DC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 2AG form factor holders and requires external mounting hardware. The part is currently classified as obsolete, necessitating identification of active equivalent components for ongoing procurement and system maintenance. The substitute part maintains identical electrical and mechanical specifications while offering current product availability.

Substiute Parts

BK/C519-7A

Eaton - Electronics DivisionIn Stock: 979BK/C519-7A Datasheet

Current PartRFQ

BK/C519-7-R

Eaton - Electronics DivisionIn Stock: 633BK/C519-7-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/C519-7A with BK/C519-7-R is based on strict equivalence across all critical electrical and mechanical parameters. Both components share identical specifications for current rating (7 A), voltage rating (125 V AC), fuse type (cartridge glass), response time (slow blow), package designation (2AG), and physical dimensions (5.20mm x 14.50mm). Both components require external holder mounting and carry UL approval certification. The substitution is valid because the electrical performance envelope, mechanical form factor, and safety certifications are identical between the two parts.

Parameter Comparison

Engineering Selection Recommendations

The BK/C519-7-R is the direct equivalent substitute for the obsolete BK/C519-7A. Selection of BK/C519-7-R is based on the following engineering criteria:

Electrical Equivalence: Both parts operate at identical current (7 A) and voltage (125 V AC) ratings with matching slow-blow response characteristics, ensuring equivalent circuit protection performance.

Mechanical Compatibility: Both components conform to the 2AG form factor with identical physical dimensions (5.20mm x 14.50mm), guaranteeing mechanical fit in existing 2AG fuse holders without modification.

Certification Alignment: Both parts carry UL approval, maintaining compliance with the same safety standards.

Product Status Advantage: BK/C519-7-R holds active product status, ensuring ongoing availability and supply chain continuity compared to the obsolete BK/C519-7A.

Compliance Enhancement: BK/C519-7-R is RoHS compliant, whereas BK/C519-7A is non-compliant. Selection of the substitute part aligns with modern environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can BK/C519-7-R be used as a direct replacement for BK/C519-7A in existing applications?

A: Yes. Both components are electrically and mechanically identical. The BK/C519-7-R operates at the same 7 A, 125 V AC rating with identical slow-blow response time and 2AG form factor. No circuit modifications or holder changes are required.

Q: What is the primary reason for substituting BK/C519-7A with BK/C519-7-R?

A: BK/C519-7A is classified as obsolete, limiting future procurement availability. BK/C519-7-R is an active product from the same manufacturer and series, providing equivalent performance with assured supply continuity.

Q: Are there any differences in physical dimensions between these two fuses?

A: No. Both components share identical dimensions of 0.205" diameter by 0.571" length (5.20mm x 14.50mm). Both conform to the 2AG package specification and are mechanically interchangeable in standard 2AG fuse holders.

Q: Does BK/C519-7-R require a different holder than BK/C519-7A?

A: No. Both fuses require external 2AG fuse holders. The same holder hardware is compatible with both components.

Q: What is the difference in RoHS compliance between these parts?

A: BK/C519-7A is RoHS non-compliant, while BK/C519-7-R is RoHS compliant. For applications subject to RoHS regulations or environmental standards, BK/C519-7-R is the appropriate selection.

Q: Are both fuses UL approved?

A: Yes. Both BK/C519-7A and BK/C519-7-R carry UL approval certification, meeting identical safety standards.

Q: What is the moisture sensitivity level for these fuses?

A: Both components have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no special moisture protection requirements during storage or handling.