5VT 63-R Equivalent & Substitute Parts

Part Overview

The 5VT 63-R is a 63 mA, 250 V AC/DC slow blow fuse cartridge manufactured by Bel Fuse Inc. in a 5mm x 20mm glass housing format. This component is classified as obsolete, indicating discontinuation from active production. Identifying equivalent substitute parts is necessary to maintain system functionality and ensure continued availability for maintenance, repair, and new design implementations where this specification remains applicable.

Substiute Parts

5VT 63-R

Bel Fuse Inc.In Stock: 9335VT 63-R Datasheet

Current PartRFQ

5ST 63-R

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Current Rating: 63 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (minimum requirement)

The 5ST 63-R meets all substitution criteria. Both parts share identical electrical ratings, mechanical form factor, and thermal operating specifications. The primary distinction is product status: the 5VT 63-R is obsolete, while the 5ST 63-R remains in active production with enhanced documentation and certification coverage.

Parameter Comparison

Engineering Selection Recommendations

The 5ST 63-R is the direct substitute for the 5VT 63-R. Both components are manufactured by Bel Fuse Inc. and maintain identical electrical and mechanical specifications. The 5ST 63-R offers the advantage of active product status, ensuring ongoing availability and support. The 5ST 63-R carries multiple international certifications (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE) and provides documented electrical characteristics including breaking capacity (35A) and DC cold resistance (23.9 Ohms), supporting comprehensive design validation. Both parts comply with ROHS3 and REACH requirements, suitable for applications requiring environmental compliance.

Frequently Asked Questions (FAQ)

Q: Can the 5ST 63-R be used as a direct replacement for the 5VT 63-R?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical current ratings (63 mA), voltage ratings (250 V AC), fuse type (cartridge, glass), response time (slow blow), and physical dimensions (5mm x 20mm). Both require the same holder for installation.

Q: What is the primary difference between these two parts?

A: The 5VT 63-R is obsolete, while the 5ST 63-R is in active production. The 5ST 63-R includes additional documented specifications and broader international certifications.

Q: Are there any compatibility concerns when substituting the 5ST 63-R for the 5VT 63-R?

A: No compatibility concerns exist. The identical package dimensions (5mm x 20mm), mounting requirements (requires holder), and electrical characteristics ensure direct interchangeability in existing designs and applications.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both the 5VT 63-R and 5ST 63-R are ROHS3 compliant and REACH unaffected. The 5ST 63-R carries additional international certifications (CCC, CE, CSA, cURus, IMQ, SEMKO, VDE).

Q: What is the operating temperature range for these fuses?

A: Both parts operate across the temperature range of -55°C to 125°C, supporting applications in diverse thermal environments.