Littelfuse 0315005.MXP Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0315005.MXP is a 5 A, 250 V AC/DC slow-blow glass cartridge fuse in the 3AB/3AG package format (1/4" x 1-1/4" axial). This component is classified as Active product status and is designed for through-hole mounting applications requiring overcurrent protection in industrial and commercial equipment. Substitute parts may be required due to inventory constraints, supply chain considerations, or design optimization needs while maintaining electrical and mechanical compatibility.

Substiute Parts

0315005.MXP

Littelfuse Inc.In Stock: 7430315005.MXP Datasheet

Current PartRFQ

0315005.HXP

Littelfuse Inc.In Stock: 11420315005.HXP Datasheet

Parametric EquivalentRFQ

3SBP 5-R

Bel Fuse Inc.In Stock: 16933SBP 5-R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 0315005.MXP are qualified based on the following critical parameters that must remain constant:

• Current Rating: 5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 3AB, 3AG, 1/4" x 1-1/4" (Axial) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Through Hole (exact match required)

Substitutes are grouped into two categories:

Parametric Equivalent: Parts that match all critical electrical and mechanical parameters with identical specifications.

Manufacturer Recommended: Parts that meet all critical parameters but may have variations in secondary characteristics such as melting I²t, DC cold resistance, or dimensional tolerances within acceptable engineering ranges.

Parameter Comparison

Engineering Selection Recommendations

0315005.HXP (Littelfuse): This part is a direct parametric equivalent to the 0315005.MXP. All critical electrical and mechanical parameters are identical, including current rating, voltage rating, response time, package format, melting I²t, and DC cold resistance. Both parts maintain Active product status and carry identical regulatory approvals (CE, CSA, K-MARK, PSE, UL). This substitute provides seamless interchangeability with no design modifications required.

3SBP 5-R (Bel Fuse Inc.): This part meets all critical electrical and mechanical parameters for substitution, including current rating, voltage rating, response time, package format, and breaking capacity. However, this part carries Obsolete product status, which may present long-term supply availability concerns. Additionally, the melting I²t value (349) differs from the main part (140), and DC cold resistance is higher (0.03 Ohms vs. 0.0214 Ohms). Regulatory approvals differ slightly (cULus instead of K-MARK). Use of this substitute should be evaluated against supply chain risk and application-specific thermal characteristics.

Frequently Asked Questions (FAQ)

Q: Can 0315005.HXP be used as a direct replacement for 0315005.MXP?

A: Yes. The 0315005.HXP is a parametric equivalent with identical electrical ratings (5 A, 250 V AC), response time (Slow Blow), package format (3AB/3AG, 1/4" x 1-1/4"), and all secondary characteristics including melting I²t and DC cold resistance. Both parts are Active status with identical regulatory certifications.

Q: What are the limitations of using 3SBP 5-R as a substitute?

A: The 3SBP 5-R meets all critical electrical and mechanical parameters for package compatibility and circuit protection function. However, it carries Obsolete product status, which may limit future availability. The melting I²t (349 vs. 140) and DC cold resistance (0.03 vs. 0.0214 Ohms) differ from the main part, which may affect thermal response characteristics in specific applications. Regulatory approvals also differ slightly (cULus vs. K-MARK).

Q: Are all three parts mechanically interchangeable in the same PCB footprint?

A: All three parts use the 3AB/3AG package format with 1/4" x 1-1/4" axial dimensions. Dimensional variations are minimal (0315005.MXP and 0315005.HXP: 0.275" Dia x 1.275" L; 3SBP 5-R: 0.272" Dia x 1.280" L). These tolerances fall within standard through-hole mounting specifications and do not prevent mechanical interchangeability.

Q: Which substitute should be selected for new designs?

A: For new designs, 0315005.HXP is the preferred substitute due to Active product status, identical electrical characteristics, and matching regulatory approvals. The 3SBP 5-R should be reserved for legacy system maintenance or applications where supply constraints necessitate its use, with consideration given to its Obsolete status and differing thermal characteristics.

Q: Do all substitutes maintain the same regulatory compliance?

A: All three parts are ROHS3 Compliant and REACH Unaffected. Regulatory agency approvals are consistent across CE, CSA, and PSE. The 0315005.MXP and 0315005.HXP include K-MARK approval, while the 3SBP 5-R includes cULus approval instead. Both certification sets are acceptable for industrial applications; verify specific regional requirements for your application.