Equivalent & Substitute Parts for BK/C519-500MA

Part Overview

The BK/C519-500MA is a 500 mA, 250 V AC/DC slow-blow glass cartridge fuse in 2AG package format (5mm x 15mm) manufactured by Eaton - Electronics Division. This fuse requires a holder for installation and is designed for general-purpose circuit protection applications. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility.

Substiute Parts

BK/C519-500MA

Eaton - Electronics DivisionIn Stock: 802BK/C519-500MA Datasheet

Current PartRFQ

BK/C519-500-R

Eaton - Electronics DivisionIn Stock: 953BK/C519-500-R Datasheet

DirectRFQ

0229.500HXP

Littelfuse Inc.In Stock: 11450229.500HXP Datasheet

SimilarRFQ

0229.500MXP

Littelfuse Inc.In Stock: 11360229.500MXP Datasheet

SimilarRFQ

0229.500VXP

Littelfuse Inc.In Stock: 10080229.500VXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BK/C519-500MA is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

• Current Rating: 500 mA (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 @ Rated Voltage: 35A minimum
• Approval Agencies: CSA and/or UL certification required
• Physical dimensions compatible with 2AG holder specifications

The substitute parts identified below meet all primary equivalence criteria. Variations in melting I²t, DC cold resistance, and dimensional tolerances are within acceptable ranges for 2AG cartridge fuse standards.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: BK/C519-500-R

The BK/C519-500-R is the direct active equivalent from Eaton - Electronics Division. This part maintains identical electrical specifications (500 mA, 250 V AC, 35A breaking capacity, 2.28 melting I²t) and mechanical form factor (2AG, 5mm x 15mm). The BK/C519-500-R is currently in active production status with ROHS3 compliance, making it the preferred replacement for obsolete BK/C519-500MA units in new designs and inventory replenishment.

Secondary Recommendations: 0229.500HXP, 0229.500MXP, 0229.500VXP

The Littelfuse 229 series fuses (0229.500HXP, 0229.500MXP, 0229.500VXP) are functionally equivalent alternatives. All three parts meet the primary equivalence criteria with identical current rating (500 mA), AC voltage rating (250 V), fuse type (cartridge glass), response time (slow blow), and package format (2AG, 5mm x 15mm). These parts carry expanded approval certifications (CE, CSA, UL) and ROHS3 compliance. The Littelfuse alternatives feature lower melting I²t values (1.16 versus 2.28) and slightly higher DC cold resistance (0.6935 versus 0.54 Ohms), which remain within acceptable tolerance ranges for 2AG cartridge fuse applications. All three Littelfuse variants are in active production with equivalent inventory availability.

Compliance Considerations:

All substitute parts carry CSA and UL certifications required for circuit protection applications. The Littelfuse alternatives provide additional CE certification for European market compliance. ROHS3 compliance is achieved by all active substitutes, addressing environmental regulatory requirements not met by the obsolete BK/C519-500MA.

Frequently Asked Questions (FAQ)

Q: Can BK/C519-500-R be used as a direct replacement for BK/C519-500MA?

A: Yes. The BK/C519-500-R is the direct active equivalent from the same manufacturer. It maintains identical electrical ratings (500 mA, 250 V AC), breaking capacity (35A), melting I²t (2.28), and mechanical form factor (2AG, 5mm x 15mm). Both parts require the same holder and are mechanically and electrically interchangeable.

Q: What is the difference between the Eaton BK/C519-500-R and Littelfuse 0229.500 series fuses?

A: Both meet all primary equivalence criteria for current rating, voltage, fuse type, response time, and package format. The primary differences are: (1) Littelfuse parts have lower melting I²t (1.16 versus 2.28), indicating faster thermal response; (2) Littelfuse parts have slightly higher DC cold resistance (0.6935 versus 0.54 Ohms); (3) Littelfuse parts include CE certification in addition to CSA and UL. These differences remain within acceptable tolerance ranges for 2AG cartridge fuse applications.

Q: Are 0229.500HXP, 0229.500MXP, and 0229.500VXP interchangeable with each other?

A: Yes. All three Littelfuse parts are electrically and mechanically identical. They share the same current rating (500 mA), voltage rating (250 V AC/125 V DC), breaking capacity (35A AC, 10kA DC), melting I²t (1.16), and 2AG package format. Selection between these variants is based on availability and packaging preferences.

Q: What holder is required for these 2AG fuses?

A: All parts in this equivalence group require a 2AG cartridge fuse holder. The 2AG standard specifies a 5mm x 15mm form factor. Verify that existing fuse holders in your application are rated for 2AG cartridges before installation.

Q: Are there any voltage or current derating considerations when substituting these fuses?

A: No. All substitute parts are rated for 250 V AC and 500 mA. The breaking capacity of 35A AC (Littelfuse) or 35A (Eaton) is equivalent for AC applications. No derating is required when substituting between these parts within their specified voltage and current ratings.

Q: What is the significance of the melting I²t difference between Eaton and Littelfuse parts?

A: The melting I²t value (2.28 for Eaton, 1.16 for Littelfuse) indicates the thermal energy required to melt the fuse element. The Littelfuse parts respond faster to thermal stress. Both values are within acceptable ranges for 500 mA slow-blow cartridge fuses. Selection should be based on application requirements for thermal response characteristics and circuit protection coordination with upstream protective devices.

Q: Are all substitute parts RoHS compliant?

A: Yes. The BK/C519-500-R and all Littelfuse alternatives (0229.500HXP, 0229.500MXP, 0229.500VXP) are ROHS3 compliant. The original BK/C519-500MA is RoHS non-compliant. Substitution with any active equivalent ensures compliance with environmental regulations.