5SFP 315 Equivalent & Substitute Parts

Part Overview

The 5SFP 315 is a 315 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and component procurement. Substitute parts must maintain identical electrical ratings, response characteristics, and mechanical compatibility to ensure reliable circuit protection without design modification.

Substiute Parts

5SFP 315

Bel Fuse Inc.In Stock: 10405SFP 315 Datasheet

Current PartRFQ

0217.315MXEP

Littelfuse Inc.In Stock: 8750217.315MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5SFP 315 is determined by strict equivalence across the following critical parameters:

• Current Rating: Must be exactly 315 mA
• Voltage Rating (AC): Must be 250 V minimum
• Fuse Type: Must be cartridge, glass construction
• Response Time: Must be fast-blow characteristic
• Package / Case: Must be 5mm x 20mm axial form factor
• Mounting Type: Must be through-hole compatible
• Breaking Capacity: Must be 35 A at rated voltage
• Operating Temperature: Must support -55°C ~ 125°C range

The substitute part 0217.315MXEP (Littelfuse Inc., Series 217) meets all mandatory electrical and mechanical parameters, confirming direct substitution capability.

Parameter Comparison

Engineering Selection Recommendations

The 0217.315MXEP from Littelfuse Inc. is a direct electrical and mechanical equivalent to the obsolete 5SFP 315. Selection between these parts should be based on the following factors:

Product Status: The 5SFP 315 is obsolete with 971 units in stock. The 0217.315MXEP is active with 799 units available, ensuring long-term supply continuity.

Compliance & Certifications: Both parts carry equivalent international approvals (CE, CSA, SEMKO, UL, VDE). The 0217.315MXEP additionally holds CCC and K-MARK certifications and is RoHS3 compliant, whereas the 5SFP 315 is RoHS non-compliant.

Packaging: The 5SFP 315 is supplied in standard packaging; the 0217.315MXEP is supplied in bulk packaging, which may affect procurement logistics.

Dimensional Tolerance: The 0217.315MXEP has a slightly larger physical dimension (0.236" Dia x 0.886" L versus 0.217" Dia x 0.827" L). Verify mechanical clearance in the target application before final selection.

Frequently Asked Questions (FAQ)

Q: Can the 0217.315MXEP be used as a direct replacement for the 5SFP 315?

A: Yes. Both parts meet identical electrical specifications (315 mA, 250 V AC, fast-blow, 35 A breaking capacity) and are housed in the same 5mm x 20mm axial cartridge form factor with through-hole mounting. Mechanical clearance verification is recommended due to minor dimensional differences.

Q: What is the significance of the melting I²t difference (0.1 vs. 0.11)?

A: The melting I²t values are within normal manufacturing tolerance for this fuse category and do not affect substitution eligibility. Both values confirm fast-blow response characteristics appropriate for the 315 mA rating.

Q: Does the RoHS compliance difference affect substitution?

A: The 0217.315MXEP is RoHS3 compliant while the 5SFP 315 is non-compliant. If the application or end-market requires RoHS compliance, the 0217.315MXEP is the appropriate choice. Otherwise, both parts are functionally equivalent.

Q: Are there any thermal or environmental considerations?

A: Both parts operate across the identical temperature range (-55°C ~ 125°C) and carry equivalent international safety approvals. No environmental restrictions apply to substitution.

Q: What packaging format should be specified for procurement?

A: The 5SFP 315 is available in standard packaging; the 0217.315MXEP is supplied in bulk. Confirm packaging requirements with your procurement department to ensure compatibility with assembly processes.