Equivalent & Substitute Parts for 5ET 63-R

Part Overview

The 5ET 63-R is a 63 mA, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor with slow-blow response characteristics. This fuse is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing system maintenance and component procurement. The 5ET series has been superseded by newer product lines while maintaining identical electrical and mechanical specifications, allowing direct functional replacement in applications requiring this current and voltage rating.

Substiute Parts

5ET 63-R

Bel Fuse Inc.In Stock: 10075ET 63-R Datasheet

Current PartRFQ

5ST 63-R

Bel Fuse Inc.In Stock: 566535ST 63-R Datasheet

Parametric EquivalentRFQ

0218.063HXP

Littelfuse Inc.In Stock: 10580218.063HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5ET 63-R is determined by strict equivalence across the following parameters:

• Current Rating: 63 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Two substitute parts meet these criteria: the 5ST 63-R (Bel Fuse Inc., active status) and the 0218.063HXP (Littelfuse Inc., active status). Both maintain identical electrical performance characteristics and physical dimensions, enabling direct replacement in existing fuse holders and circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

The 5ST 63-R represents the primary substitute for the obsolete 5ET 63-R, as both are manufactured by Bel Fuse Inc. and share identical electrical specifications and physical dimensions. The 5ST 63-R is currently in active production with extensive regulatory approvals including CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE certifications, and is ROHS3 compliant.

The 0218.063HXP from Littelfuse Inc. serves as an alternative substitute with equivalent electrical performance. This part carries active product status with regulatory approvals including CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications, and is also ROHS3 compliant. The 0218.063HXP exhibits a nominal diameter of 0.205" (5.20mm) compared to 0.201" (5.10mm) for the primary part, representing a 0.10mm tolerance variation within acceptable mechanical limits for standard fuse holder applications.

Both substitute parts are suitable for direct replacement in applications requiring 63 mA, 250 V AC/DC protection with slow-blow response characteristics in 5mm x 20mm cartridge form factor.

Frequently Asked Questions (FAQ)

Q: Can the 5ST 63-R directly replace the obsolete 5ET 63-R?

A: Yes. The 5ST 63-R is electrically and mechanically equivalent to the 5ET 63-R, with identical current rating (63 mA), voltage rating (250 V AC), fuse type (cartridge, glass), package dimensions (5mm x 20mm), and response time (slow blow). Both require a fuse holder for installation.

Q: What is the difference between the 5ST 63-R and 0218.063HXP?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is manufacturer: 5ST 63-R is from Bel Fuse Inc., while 0218.063HXP is from Littelfuse Inc. The 0218.063HXP has a nominal diameter of 5.20mm versus 5.10mm for the 5ST 63-R, a 0.10mm variation that remains within standard fuse holder tolerances. Regulatory approvals differ slightly between manufacturers.

Q: Are both substitute parts currently available?

A: Yes. The 5ST 63-R is in active production status with 56,609 units in stock. The 0218.063HXP is also active with 1,045 units in stock.

Q: Do the substitute parts require the same holder as the original 5ET 63-R?

A: Yes. All three parts are 5mm x 20mm cartridge fuses requiring a standard fuse holder. The mechanical compatibility is maintained across all substitutes.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both the 5ST 63-R and 0218.063HXP are ROHS3 compliant.