Littelfuse 0514010.MXEP Ceramic Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0514010.MXEP is a 10 A, 500 V AC ceramic cartridge fuse designed for through-hole mounting in 3AB/3AG package format (1/4" x 1-1/4" axial). This fast-blow fuse is actively manufactured and widely used in industrial and commercial electrical protection circuits. Finding equivalent or substitute parts may be necessary due to supply chain constraints, regional availability, or specific application requirements where higher voltage ratings or breaking capacity are beneficial.

Substiute Parts

0514010.MXEP

LittelfuseIn Stock: 12950514010.MXEP Datasheet

Current PartRFQ

BK-AHC-V-10-R

Eaton - Electronics DivisionIn Stock: 1045BK-AHC-V-10-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Littelfuse 0514010.MXEP is permissible with the Eaton BK-AHC-V-10-R based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters (Substitution Basis):

• Current Rating: Both rated at 10 A
• Fuse Type: Both are ceramic cartridge fuses with fast-blow response
• Package / Case: Both use 3AB/3AG format, 1/4" x 1-1/4" (6.99mm x 32.72mm) axial configuration
• Mounting Type: Both are through-hole mounted
• Operating Temperature Range: Both operate from -55°C to 125°C
• RoHS Compliance: Both are ROHS3 compliant

Differing Parameters (Acceptable Variance):

• Voltage Rating (AC): Littelfuse rated at 500 V; Eaton rated at 600 V (higher rating is acceptable in lower-voltage applications)
• Breaking Capacity: Littelfuse 5 kA; Eaton 10 kA (higher capacity provides enhanced protection margin)
• Melting I²t: Littelfuse 50.6; Eaton 66 (minor variance within acceptable thermal characteristics)
• DC Cold Resistance: Littelfuse 0.0202 Ohms; Eaton 0.0165 Ohms (negligible difference in circuit performance)
• Approval Agencies: Littelfuse CE/cURus; Eaton UL (different but equivalent regulatory certifications)

Parameter Comparison

Engineering Selection Recommendations

The Eaton BK-AHC-V-10-R is a direct substitute for the Littelfuse 0514010.MXEP in applications operating at or below 500 V AC. The substitute part's higher voltage rating (600 V) and increased breaking capacity (10 kA versus 5 kA) provide enhanced safety margins without compromising circuit protection performance. Both parts maintain identical current ratings, response characteristics, and physical form factors, ensuring seamless integration into existing through-hole mounting designs.

Both parts hold active product status and comply with relevant regulatory standards. The Littelfuse part carries CE and cURus approvals, while the Eaton part carries UL approval. Selection between these parts should be based on regional compliance requirements, supply availability, and existing qualification documentation within your organization.

Frequently Asked Questions (FAQ)

Q: Can the Eaton BK-AHC-V-10-R be used as a direct replacement for the Littelfuse 0514010.MXEP?

A: Yes. Both parts share identical current ratings (10 A), fuse type (ceramic cartridge), response time (fast blow), and physical package dimensions (3AB/3AG, 1/4" x 1-1/4" axial). The Eaton part's higher voltage rating and breaking capacity are compatible with applications designed for the Littelfuse part.

Q: What is the significance of the voltage rating difference (500 V vs. 600 V)?

A: The Eaton substitute is rated for 600 V AC, which exceeds the Littelfuse specification of 500 V AC. A higher-rated fuse can be safely used in lower-voltage applications. The fuse will operate within its design parameters and provide equivalent protection at 500 V or below.

Q: Are the breaking capacity differences important?

A: The Eaton part has a breaking capacity of 10 kA compared to the Littelfuse 5 kA rating. Higher breaking capacity indicates the fuse can safely interrupt larger fault currents. This represents an improvement in circuit protection capability and is acceptable for direct substitution.

Q: Do the regulatory certifications differ, and does this matter?

A: The Littelfuse part carries CE and cURus approvals; the Eaton part carries UL approval. These are equivalent regulatory certifications from recognized standards bodies. Selection should align with your regional compliance requirements and existing product qualification documentation.

Q: Are the physical dimensions identical?

A: Yes. Both parts use the 3AB/3AG package format with dimensions of 1/4" diameter x 1-1/4" length (6.99mm x 32.72mm). They are mechanically interchangeable in through-hole mounting applications.

Q: What is the impact of the melting I²t difference?

A: The Eaton part has a melting I²t of 66 compared to the Littelfuse 50.6. This minor variance reflects slightly different thermal characteristics but remains within acceptable limits for equivalent fuse performance in the same application circuit.