Equivalent & Substitute Parts for BK/C519-1.5-R

Part Overview

The BK/C519-1.5-R is a 1.5 A, 250 V AC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring a 2AG form factor (5mm x 15mm) and operates as an active product with full RoHS compliance. Substitute parts are necessary to address supply chain requirements, alternative sourcing options, or specific application voltage ratings that may exceed the primary part's DC specifications.

Substiute Parts

BK/C519-1.5-R

Eaton - Electronics DivisionIn Stock: 939BK/C519-1.5-R Datasheet

Current PartRFQ

022901.5HXP

Littelfuse Inc.In Stock: 1548022901.5HXP Datasheet

DirectRFQ

022901.5MXP

Littelfuse Inc.In Stock: 1904022901.5MXP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/C519-1.5-R is determined by the following critical parameters:

Mandatory Matching Parameters:

• Current Rating: 1.5 A
• Voltage Rating - AC: 250 V
• Fuse Type: Cartridge, Glass
• Package / Case: 2AG, 5mm x 15mm
• Response Time: Slow Blow
• Mounting Type: Requires Holder

Acceptable Variation Parameters:

• Voltage Rating - DC: The main part does not specify DC voltage; substitute parts with DC ratings (125 V DC) are compatible for AC applications and provide extended functionality for dual-voltage systems
• Breaking Capacity: Substitute parts may have different breaking capacities (35A AC, 10kA DC) while maintaining the same current and voltage ratings
• Melting I²t: Substitute parts may have different melting I²t values (15 versus 31.989) while maintaining slow-blow response characteristics
• Approval Agencies: Substitute parts with expanded certifications (CE, PSE in addition to CSA, UL) maintain or exceed compliance requirements
• Operating Temperature Range: Substitute parts with specified temperature ranges (-55°C ~ 125°C) provide defined thermal operating boundaries

The substitute parts 022901.5HXP and 022901.5MXP from Littelfuse Inc. meet all mandatory matching parameters and are direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts 022901.5HXP and 022901.5MXP are functionally equivalent to the BK/C519-1.5-R for AC applications at 250 V and 1.5 A. Selection between these options is based on the following engineering criteria:

Compliance and Certification: All three parts maintain active product status and RoHS compliance. The Littelfuse substitutes (022901.5HXP and 022901.5MXP) provide expanded international certifications including CE and PSE in addition to CSA and UL, supporting broader geographic deployment requirements.

Voltage Capability: The Littelfuse substitutes specify 125 V DC rating, enabling operation in dual-voltage AC/DC systems. The primary part does not specify DC voltage capability. For applications limited to AC operation at 250 V, all three parts are equivalent.

Thermal Operating Range: The Littelfuse substitutes define an operating temperature range of -55°C to 125°C. The primary part does not specify operating temperature limits. For applications with defined thermal requirements within this range, the substitutes provide documented performance boundaries.

Physical Dimensions: Minor dimensional variations exist between the primary part (5.20mm diameter) and substitutes (4.50mm diameter). Both conform to the 2AG, 5mm x 15mm package specification and are mechanically compatible with standard 2AG fuse holders.

Electrical Characteristics: The substitutes exhibit lower melting I²t values (15 versus 31.989) while maintaining slow-blow response classification. Both parts maintain DC cold resistance within 0.1 Ohms specification tolerance. The substitutes provide 35A AC breaking capacity compared to the primary part's 100A rating; both exceed typical circuit protection requirements for 1.5 A fuses.

Frequently Asked Questions (FAQ)

Q: Can 022901.5HXP and 022901.5MXP be used interchangeably with BK/C519-1.5-R?

A: Yes. Both Littelfuse parts are direct functional equivalents for AC applications at 250 V and 1.5 A. All three parts share identical current rating, AC voltage rating, fuse type, package designation, response time, and mounting requirements. The parts are mechanically and electrically compatible within standard 2AG fuse holders.

Q: What is the difference between 022901.5HXP and 022901.5MXP?

A: Both parts are identical in electrical specifications, physical dimensions, certifications, and performance characteristics. The designation difference (HXP versus MXP) reflects Littelfuse internal product line differentiation. For substitution purposes, either part functions identically.

Q: Do the substitute parts fit in existing 2AG fuse holders designed for BK/C519-1.5-R?

A: Yes. All three parts conform to the 2AG, 5mm x 15mm package specification and are mechanically compatible with standard 2AG fuse holders. Minor dimensional variations (5.20mm versus 4.50mm diameter) do not affect holder compatibility.

Q: What does the lower melting I²t value in the substitute parts indicate?

A: The Littelfuse substitutes have a melting I²t of 15 compared to the primary part's 31.989. Both parts maintain slow-blow response classification. The lower I²t value indicates faster thermal response to sustained overcurrent conditions while preserving the slow-blow characteristic for transient current spikes. Both values are within acceptable parameters for 1.5 A fuse applications.

Q: Are the substitute parts suitable for DC applications?

A: The Littelfuse substitutes specify 125 V DC rating, enabling operation in DC circuits up to 125 V. The primary part does not specify DC voltage capability. For applications requiring DC operation, the Littelfuse substitutes provide documented DC performance. For AC-only applications at 250 V, all three parts are equivalent.

Q: Do the substitute parts maintain the same approval certifications?

A: The substitute parts maintain CSA and UL certifications equivalent to the primary part and add CE and PSE certifications. All parts are RoHS compliant. The expanded certification scope of the substitutes supports broader international application requirements without reducing compliance for existing CSA/UL-dependent applications.

Q: What is the operating temperature range for these fuses?

A: The Littelfuse substitutes specify an operating temperature range of -55°C to 125°C. The primary part does not specify operating temperature limits. For applications with defined thermal requirements, the substitutes provide documented performance boundaries within this range.