BK/C520-1 Equivalent & Substitute Parts

Part Overview

The BK/C520-1 is a 1 A, 350 V AC fast-blow glass cartridge fuse manufactured by Eaton - Electronics Division in the 2AG package format (5mm x 15mm). This fuse is designed for circuits requiring fast response protection at 350 V AC with a breaking capacity of 100 A at rated voltage.

The BK/C520-1 carries an obsolete product status. Identification of equivalent and substitute parts is necessary to maintain circuit protection functionality in applications where the original component is no longer available through standard distribution channels.

Substiute Parts

BK/C520-1

Eaton - Electronics DivisionIn Stock: 1250BK/C520-1 Datasheet

Current PartRFQ

2JQ 1-R

Bel Fuse Inc.In Stock: 8752JQ 1-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BK/C520-1 is determined by the following critical parameters:

Current Rating: 1 A (exact match required)

Voltage Rating - AC: 350 V (exact match required)

Package / Case: 2AG, 5mm x 15mm (exact match required for mechanical and electrical compatibility)

Fuse Type: Cartridge, Glass (exact match required)

Response Time: Fast Blow (exact match required for circuit protection characteristics)

The substitute part 2JQ 1-R from Bel Fuse Inc. satisfies all critical substitution criteria. This part maintains identical current rating, AC voltage rating, package format, fuse type, and response time characteristics. The 2JQ 1-R additionally provides DC voltage rating capability (140 V DC) and enhanced breaking capacity on DC circuits (150 A DC), which represents a functional superset of the original BK/C520-1 specifications.

Parameter Comparison

Engineering Selection Recommendations

The 2JQ 1-R from Bel Fuse Inc. is the direct substitute for the obsolete BK/C520-1. Both parts maintain identical electrical and mechanical specifications for AC circuit protection at 1 A and 350 V.

The 2JQ 1-R carries active product status, ensuring continued availability and supply chain reliability. This part holds broader regulatory approvals (CE, CSA, cURus, PSE) compared to the BK/C520-1 (CSA, UL), providing expanded compliance coverage for international applications.

The 2JQ 1-R achieves ROHS3 compliance, whereas the BK/C520-1 is RoHS non-compliant. For applications subject to RoHS requirements, the 2JQ 1-R satisfies regulatory mandates.

The melting I²t value of the 2JQ 1-R (0.62) is slightly lower than the BK/C520-1 (0.68), indicating marginally faster thermal response. This difference remains within the fast-blow fuse category and does not alter the substitution validity for standard circuit protection applications.

Physical dimensions show minor variation (2JQ 1-R: 5.10mm x 13.80mm versus BK/C520-1: 5.20mm x 14.00mm), remaining within the 2AG package specification tolerance and ensuring mechanical compatibility with existing fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the 2JQ 1-R replace the BK/C520-1 in existing circuits?

A: Yes. The 2JQ 1-R maintains identical current rating (1 A), AC voltage rating (350 V), package format (2AG, 5mm x 15mm), fuse type (cartridge, glass), and response time (fast blow). Mechanical and electrical compatibility is confirmed.

Q: What is the significance of the DC voltage rating on the 2JQ 1-R?

A: The 2JQ 1-R provides 140 V DC rating, which the BK/C520-1 does not specify. This additional capability does not affect AC circuit applications and represents an expanded functional range for the substitute part.

Q: How do the melting I²t values affect substitution?

A: The melting I²t value determines thermal response speed. The 2JQ 1-R (0.62) exhibits slightly faster thermal response than the BK/C520-1 (0.68). Both remain classified as fast-blow fuses and are suitable for equivalent circuit protection applications.

Q: Are there physical dimension differences between these parts?

A: Minor dimensional variation exists (2JQ 1-R: 5.10mm x 13.80mm versus BK/C520-1: 5.20mm x 14.00mm). Both conform to the 2AG package specification and are mechanically compatible with standard 2AG fuse holders.

Q: What regulatory approvals does the 2JQ 1-R hold?

A: The 2JQ 1-R carries CE, CSA, cURus, and PSE approvals. The BK/C520-1 holds CSA and UL approvals. The 2JQ 1-R provides broader international compliance coverage.

Q: Is the 2JQ 1-R RoHS compliant?

A: Yes. The 2JQ 1-R achieves ROHS3 compliance. The BK/C520-1 is RoHS non-compliant. For applications requiring RoHS compliance, the 2JQ 1-R satisfies regulatory requirements.

Q: What is the product availability status of the substitute?

A: The 2JQ 1-R carries active product status with 796 pieces in stock. The BK/C520-1 is obsolete. The substitute ensures continued supply chain access.