Littelfuse 0224.375MXP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0224.375MXP is a 375 mA fast-blow glass cartridge fuse rated for 250 V AC and 125 V DC operation. This through-hole component features a 2AG package format with 5mm x 15mm dimensions and is designed for circuit protection applications requiring reliable overcurrent interruption. The part maintains active product status with full compliance to CE, CSA, and UL approval agencies. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

0224.375MXP

Littelfuse Inc.In Stock: 8710224.375MXP Datasheet

Current PartRFQ

0224.375HXP

Littelfuse Inc.In Stock: 11460224.375HXP Datasheet

Parametric EquivalentRFQ

BK/C518-375-R

Eaton - Electronics DivisionIn Stock: 698BK/C518-375-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0224.375MXP are classified based on strict electrical and mechanical parameter alignment:

Parametric Equivalent Classification: Parts matching all critical electrical parameters (375 mA current rating, 250 V AC / 125 V DC voltage ratings, fast-blow response, 2AG package format, and through-hole mounting) are designated as parametric equivalents. These parts maintain identical functional performance within the specified operating envelope.

Manufacturer Recommended Classification: Parts meeting core electrical specifications (375 mA, 250 V AC, fast-blow, 2AG package) but with variations in secondary parameters (DC voltage rating, melting I²t, physical dimensions, or DC cold resistance) are classified as manufacturer-recommended alternatives. These parts provide functional substitution with documented parameter differences requiring engineering review.

Critical Parameters for Substitution:

• Current Rating: 375 mA (mandatory match)
• Voltage Rating - AC: 250 V (mandatory match)
• Fuse Type: Cartridge, Glass (mandatory match)
• Response Time: Fast Blow (mandatory match)
• Package / Case: 2AG format (mandatory match)
• Mounting Type: Through Hole (mandatory match)

Parameter Comparison

Engineering Selection Recommendations

0224.375HXP (Littelfuse) - Parametric Equivalent: This part is a direct parametric equivalent to the 0224.375MXP. All electrical specifications, mechanical dimensions, thermal operating range, and approval certifications are identical. Both parts carry ROHS3 compliance and full CE, CSA, and UL approvals. Selection between these two Littelfuse variants is based on inventory availability and procurement lead times, with no functional or compliance trade-offs.

BK/C518-375-R (Eaton) - Manufacturer Recommended Alternative: This Eaton fuse meets the core electrical requirements of 375 mA current rating and 250 V AC operation with fast-blow response in a 2AG through-hole package. However, engineering review is required for the following parameter differences: (1) DC voltage rating is not specified, whereas the Littelfuse parts are rated for 125 V DC; (2) melting I²t is significantly lower (0.039 versus 0.171), indicating faster thermal response; (3) DC cold resistance is substantially higher (2.53 Ohms versus 0.395 Ohms); (4) physical dimensions vary slightly (0.217" diameter and 0.598" length versus 0.185" diameter and 0.570" length); (5) approval agencies include CSA and UL but not CE. This part is suitable for AC-only applications or where the lower melting I²t and higher resistance characteristics are acceptable. Applications requiring DC operation or matching the exact thermal and resistance profile of the original specification should use the Littelfuse equivalents.

Frequently Asked Questions (FAQ)

Q: Can the 0224.375HXP be used as a direct replacement for the 0224.375MXP? A: Yes. The 0224.375HXP is a parametric equivalent with identical electrical ratings (375 mA, 250 V AC, 125 V DC), response time (fast-blow), package format (2AG), and approval certifications (CE, CSA, UL). No design or circuit modifications are required.

Q: What are the key differences between the Littelfuse 0224.375MXP and the Eaton BK/C518-375-R? A: The primary differences are: (1) DC voltage rating is unspecified for the Eaton part; (2) melting I²t is lower (0.039 versus 0.171), resulting in faster thermal response; (3) DC cold resistance is higher (2.53 Ohms versus 0.395 Ohms); (4) physical dimensions are slightly larger; (5) CE approval is not listed for the Eaton part. These differences may affect performance in DC circuits or applications sensitive to fuse thermal characteristics.

Q: Is the Eaton BK/C518-375-R suitable for DC applications? A: The Eaton part does not specify a DC voltage rating. Applications requiring 125 V DC operation should use the Littelfuse 0224.375MXP or 0224.375HXP, which are explicitly rated for this voltage level.

Q: How do the melting I²t values affect fuse selection? A: Melting I²t determines the thermal energy required to melt the fuse element. The Littelfuse parts (0.171) have a higher melting I²t than the Eaton part (0.039), meaning the Littelfuse fuses respond more slowly to thermal stress. Circuit designs optimized for the Littelfuse thermal profile may experience different protection timing with the Eaton alternative.

Q: Are all three parts RoHS compliant? A: Yes. The Littelfuse parts carry ROHS3 compliance, and the Eaton part is RoHS compliant. All three parts meet environmental regulatory requirements.

Q: What approval certifications should I verify for my application? A: The Littelfuse parts (0224.375MXP and 0224.375HXP) carry CE, CSA, and UL approvals. The Eaton part (BK/C518-375-R) carries CSA and UL approvals but does not list CE certification. Verify that the selected part meets the approval requirements specified in your application or regional standards.

Q: Can the physical dimension differences between the Littelfuse and Eaton fuses affect installation? A: The Eaton part is slightly larger (0.217" diameter and 0.598" length versus 0.185" diameter and 0.570" length). Verify that the fuse holder or socket accommodates the larger dimensions before substitution. Both parts use the 2AG through-hole package format and should fit standard 2AG holders, but tight mechanical tolerances may require confirmation.