Equivalent & Substitute Parts for BK/C519-375-R

Part Overview

The BK/C519-375-R is a 375 mA, 250 V AC slow-blow glass cartridge fuse manufactured by Eaton - Electronics Division. This fuse is designed for use in 2AG holders with dimensions of 5mm x 15mm and is currently in active production status. The part is RoHS compliant and holds CSA and UL approvals. Substitute parts are identified when equivalent electrical and mechanical parameters are required for circuit protection applications where the original part number is unavailable or when design specifications permit alternative qualified sources.

Key Parameters

Parameter	Value
Current Rating	375 mA
Voltage Rating - AC	250 V
Fuse Type	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm
Response Time	Slow Blow
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Approval Agencies	CSA, UL
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitute parts for the BK/C519-375-R are qualified based on the following critical parameters that must remain constant:

Current Rating: 375 mA (exact match required)
Voltage Rating - AC: 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 2AG, 5mm x 15mm (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Requires Holder (exact match required)

The substitute parts identified—0229.375HXP and 0229.375MXP, both manufactured by Littelfuse Inc.—meet all critical electrical and mechanical parameters. Both substitutes are manufactured glass cartridge fuses with identical current ratings, AC voltage ratings, package dimensions, and response characteristics. The substitutes provide additional DC voltage rating capability (125 V DC) and enhanced breaking capacity specifications (35A AC, 10kA DC) compared to the main part, which does not specify DC voltage rating. Both substitute parts hold CSA and UL approvals and are RoHS3 compliant.

Parameter Comparison

Parameter	BK/C519-375-R (Eaton)	0229.375HXP (Littelfuse)	0229.375MXP (Littelfuse)
Current Rating (Amps)	375 mA	375 mA	375 mA
Voltage Rating - AC	250 V	250 V	250 V
Voltage Rating - DC	Not specified	125 V	125 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Package / Case	2AG, 5mm x 15mm	2AG, 5mm x 15mm	2AG, 5mm x 15mm
Response Time	Slow Blow	Slow Blow	Slow Blow
Breaking Capacity @ Rated Voltage	35A	35A AC, 10kA DC	35A AC, 10kA DC
Melting I²t	1.531	0.58	0.58
DC Cold Resistance (Ohms)	0.81	1.1685	1.1685
Approval Agencies	CSA, UL	CE, CSA, UL	CE, CSA, UL
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant
Operating Temperature Range	Not specified	-55°C ~ 125°C	-55°C ~ 125°C
Product Status	Active	Active	Active

Engineering Selection Recommendations

Both Littelfuse substitute parts (0229.375HXP and 0229.375MXP) are qualified alternatives to the BK/C519-375-R based on matching electrical and mechanical specifications. Selection between the main part and substitutes should be based on:

Compliance and Certification: All three parts hold CSA and UL approvals. The Littelfuse substitutes additionally hold CE certification and are ROHS3 compliant, providing broader regulatory coverage.

Product Availability: The BK/C519-375-R has 919 units in stock. The 0229.375HXP has 682 units in stock. The 0229.375MXP has 2201 units in stock, providing the highest availability.

Electrical Performance: The substitutes provide DC voltage rating specification (125 V DC) and enhanced DC breaking capacity (10kA DC), which may be advantageous in applications requiring DC circuit protection capability. The main part does not specify DC ratings.

Physical Compatibility: All three parts use identical 2AG, 5mm x 15mm package dimensions and require the same holder type, ensuring direct mechanical interchangeability.

Frequently Asked Questions (FAQ)

Q: Can 0229.375HXP and 0229.375MXP be used interchangeably with BK/C519-375-R?

A: Yes. Both Littelfuse parts meet the critical electrical parameters (375 mA current rating, 250 V AC voltage rating) and mechanical specifications (2AG, 5mm x 15mm package) required for direct substitution. Both are slow-blow glass cartridge fuses with identical response characteristics and holder requirements.

Q: What is the difference between 0229.375HXP and 0229.375MXP?

A: Both parts are electrically and mechanically identical. They share the same current rating, voltage ratings, package dimensions, response time, breaking capacity, and approval certifications. The difference lies in inventory availability, with 0229.375MXP having significantly higher stock levels (2201 units versus 682 units).

Q: Does the BK/C519-375-R have DC voltage rating capability?

A: The BK/C519-375-R specification does not include a DC voltage rating. The Littelfuse substitutes (0229.375HXP and 0229.375MXP) are rated for 125 V DC, providing additional capability for DC circuit applications.

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

A: The BK/C519-375-R has dimensions of 0.205" Dia x 0.571" L (5.20mm x 14.50mm). The Littelfuse substitutes have dimensions of 0.177" Dia x 0.570" L (4.50mm x 14.48mm). Both use the 2AG, 5mm x 15mm package standard and are mechanically compatible with the same holder type.

Q: What approvals do the substitute parts hold?

A: Both 0229.375HXP and 0229.375MXP hold CE, CSA, and UL approvals. The main part BK/C519-375-R holds CSA and UL approvals. The substitutes provide additional CE certification coverage.

Q: Are all three parts RoHS compliant?

A: Yes. The BK/C519-375-R is RoHS Compliant. Both Littelfuse substitutes are ROHS3 Compliant, representing the current RoHS standard.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message