Littelfuse 0217.630MXEP Equivalent & Substitute Parts

Part Overview

The Littelfuse 0217.630MXEP is a 630 mA, 250 V AC/DC fast-blow glass cartridge fuse with a 5mm x 20mm axial form factor. This component is designed for through-hole mounting applications requiring reliable overcurrent protection. The part maintains active product status with 1914 units in current inventory. Substitute parts are identified when equivalent electrical ratings, mechanical dimensions, and approval certifications align with the original specification, enabling direct replacement in compatible circuit designs.

Substiute Parts

0217.630MXEP

Littelfuse Inc.In Stock: 19520217.630MXEP Datasheet

Current PartRFQ

5SFP 630-R

Bel Fuse Inc.In Stock: 20705SFP 630-R Datasheet

DirectRFQ

BK/S500-V-630-R

Eaton - Electronics DivisionIn Stock: 748BK/S500-V-630-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Littelfuse 0217.630MXEP are qualified based on the following criteria:

• Current Rating: 630 mA (exact match required)
• Voltage Rating (AC): 250 V (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)
• Fuse Type: Cartridge, Glass (exact match required)
• Breaking Capacity @ Rated Voltage: 35 A (exact match required)

The following parts meet all substitution criteria and are listed as direct equivalents:

• Bel Fuse Inc. 5SFP 630-R
• Eaton - Electronics Division BK/S500-V-630-R

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active product status and comply with RoHS requirements. The Littelfuse 0217.630MXEP carries approvals from CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. The Bel Fuse 5SFP 630-R holds certifications from CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE. The Eaton BK/S500-V-630-R is certified by BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE.

Dimensional variations exist among the three parts. The Littelfuse part measures 5.80mm diameter x 22.50mm length, while the Bel Fuse part measures 5.50mm diameter x 21.00mm length, and the Eaton part measures 5.54mm diameter x 21.10mm length. These dimensional differences fall within the 5mm x 20mm axial package classification but may affect fit in space-constrained applications.

DC cold resistance values differ slightly: Littelfuse at 0.19 Ohms, Bel Fuse at 0.15 Ohms, and Eaton at 0.2 Ohms. Melting I²t values also vary: Littelfuse at 0.41, Bel Fuse at 0.64, and Eaton at 0.35. These variations reflect manufacturer-specific design characteristics within the fast-blow classification.

Frequently Asked Questions (FAQ)

Q: Can the Bel Fuse 5SFP 630-R directly replace the Littelfuse 0217.630MXEP?

A: Yes. Both parts share identical electrical ratings (630 mA, 250 V AC, fast-blow response), identical breaking capacity (35 A), and identical package classification (5mm x 20mm axial, through-hole). Dimensional and resistance variations are within acceptable tolerances for equivalent substitution.

Q: Can the Eaton BK/S500-V-630-R directly replace the Littelfuse 0217.630MXEP?

A: Yes. Both parts meet all substitution criteria: 630 mA current rating, 250 V AC voltage rating, fast-blow response, 35 A breaking capacity, and 5mm x 20mm axial through-hole package. Minor dimensional and resistance differences do not affect functional equivalence.

Q: What are the key differences between these three parts?

A: The primary differences are manufacturer identity, dimensional specifications, DC cold resistance, melting I²t values, and certification bodies. All three parts are functionally equivalent for 630 mA, 250 V AC/DC fast-blow fuse applications in 5mm x 20mm axial through-hole configurations.

Q: Are there any approval certifications that differ between these parts?

A: Yes. The Littelfuse part includes K-MARK and UL certifications. The Bel Fuse part includes cULus and IMQ certifications. The Eaton part includes BSI, cULus, and IMQ certifications. All three carry CCC, CE, CSA, SEMKO, and VDE approvals. Selection should consider application-specific certification requirements.

Q: Will dimensional differences affect circuit board compatibility?

A: Dimensional variations are minor and fall within the 5mm x 20mm axial package specification. However, in space-constrained designs, verify that the specific dimensions of the selected part fit the available footprint. The Bel Fuse part is the smallest (5.50mm x 21.00mm), while the Littelfuse part is the largest (5.80mm x 22.50mm).