5SFP 6.3-R Equivalent & Substitute Parts

Part Overview

The 5SFP 6.3-R is a 6.3 A 250 V AC/DC fast-blow glass cartridge fuse manufactured by Bel Fuse Inc., designed for through-hole mounting in 5mm x 20mm form factor applications. The part is active in production with 1780 units in stock. Equivalent substitute parts are necessary to ensure design flexibility, supply chain continuity, and component availability across multiple sourcing channels.

Substiute Parts

5SFP 6.3-R

Bel Fuse Inc.In Stock: 18435SFP 6.3-R Datasheet

Current PartRFQ

0034.1524.PT

SCHURTER Inc.In Stock: 18890034.1524.PT Datasheet

DirectRFQ

021706.3MXEP

LittelfuseIn Stock: 1353021706.3MXEP Datasheet

DirectRFQ

BK/S500-V-6.3-R

Eaton - Electronics DivisionIn Stock: 1322BK/S500-V-6.3-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5SFP 6.3-R are qualified based on the following critical parameters:

• Current Rating: 6.3 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Breaking Capacity @ Rated Voltage: 63 A (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)
• RoHS Status: ROHS3 Compliant (exact match required)

All substitute parts listed meet these criteria and are therefore electrically and mechanically interchangeable with the 5SFP 6.3-R in applications requiring a 6.3 A 250 V AC/DC fast-blow glass fuse in 5mm x 20mm through-hole configuration.

Parameter Comparison

Engineering Selection Recommendations

All four parts are active products with ROHS3 compliance and are suitable for direct substitution in applications requiring a 6.3 A 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm through-hole configuration.

Selection among these parts may be based on:

• Approval agency requirements: The 5SFP 6.3-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. The 0034.1524.PT carries cURus approval. The 021706.3MXEP carries BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE approvals. The BK/S500-V-6.3-R carries BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE approvals.

• Inventory availability: 5SFP 6.3-R (1780 units), 0034.1524.PT (1872 units), 021706.3MXEP (1317 units), BK/S500-V-6.3-R (1281 units).

• Melting I²t characteristics: Values range from 53.2 to 69, with minor variations that do not affect interchangeability for standard circuit protection applications.

• Physical dimensions: All parts fit the 5mm x 20mm form factor with minor dimensional tolerances within acceptable mounting ranges.

Frequently Asked Questions (FAQ)

Q: Are these parts electrically interchangeable with the 5SFP 6.3-R?

A: Yes. All listed substitute parts share identical current rating (6.3 A), voltage rating (250 V AC), fuse type (cartridge, glass), response time (fast blow), package configuration (5mm x 20mm axial), mounting type (through hole), and breaking capacity (63 A). They are direct electrical equivalents.

Q: Do dimensional differences affect mechanical compatibility?

A: All parts conform to the 5mm x 20mm axial cartridge fuse standard. Minor dimensional variations (within 0.015" diameter and 0.059" length tolerances) do not prevent mechanical interchangeability in standard through-hole fuse holders designed for this form factor.

Q: Which substitute part should I select if a specific approval agency certification is required?

A: Verify the required approval agency against each part's certification list. The 021706.3MXEP (Littelfuse) carries the broadest approval coverage including BSI, CCC, CE, CSA, KC, PSE, SEMKO, UR, and VDE. The BK/S500-V-6.3-R (Eaton) and 5SFP 6.3-R (Bel Fuse) both carry cULus certification, while the 0034.1524.PT (SCHURTER) carries cURus certification.

Q: What is the significance of the Melting I²t values?

A: Melting I²t indicates the thermal energy required to melt the fuse element. The values provided (53.2 to 69) represent minor variations within the fast-blow fuse category and do not affect interchangeability for standard circuit protection applications where all parts are rated for 6.3 A at 250 V AC/DC.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four parts carry ROHS3 Compliant status and are suitable for applications requiring RoHS compliance.