Bel Fuse Inc. 5VT 10 Glass Cartridge Fuse Equivalent & Substitute Parts

Part Overview

The Bel Fuse Inc. 5VT 10 is a 10 A, 250 V AC/DC slow-blow glass cartridge fuse in a 5mm x 20mm form factor designed for circuits requiring holder-based mounting. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing system support and new design implementations. Substitute parts must maintain identical electrical ratings and mechanical dimensions to ensure direct compatibility within existing fuse holder assemblies.

Substiute Parts

5VT 10

Bel Fuse Inc.In Stock: 8205VT 10 Datasheet

Current PartRFQ

5ET 10-R

Bel Fuse Inc.In Stock: 68785ET 10-R Datasheet

Parametric EquivalentRFQ

5ST 10-R

Bel Fuse Inc.In Stock: 932075ST 10-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5VT 10 is determined by strict equivalence across the following parameters:

• Current Rating: 10 A (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 (exact match required)

Both identified substitute parts—5ET 10-R and 5ST 10-R—meet all mandatory electrical and mechanical parameters. The primary distinction between substitutes lies in product status (both active versus obsolete main part), regulatory compliance certifications, and electrical performance characteristics such as breaking capacity and melting I²t values.

Parameter Comparison

Engineering Selection Recommendations

Both 5ET 10-R and 5ST 10-R are active, in-stock alternatives to the obsolete 5VT 10. Selection between these two substitutes should be based on regulatory compliance requirements and breaking capacity specifications for the target application.

The 5ET 10-R carries CE and SEMKO certifications with a breaking capacity of 150 A at rated voltage. The 5ST 10-R carries CE, CSA, and cURus certifications with a breaking capacity of 10 A at rated voltage. Both parts are ROHS3 compliant, addressing environmental compliance gaps present in the original 5VT 10 specification.

For applications requiring North American regulatory approval, the 5ST 10-R is the appropriate selection due to CSA and cURus certifications. For applications requiring European market compliance with higher breaking capacity performance, the 5ET 10-R is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can 5ET 10-R and 5ST 10-R be used interchangeably with 5VT 10?

A: Both parts are electrically and mechanically equivalent to 5VT 10 across all mandatory parameters: 10 A current rating, 250 V AC voltage rating, slow-blow response, 5mm x 20mm form factor, and holder-based mounting. Physical installation compatibility is confirmed. Selection between the two substitutes depends on regulatory certification requirements and breaking capacity specifications for the specific application.

Q: What is the difference between 5ET 10-R and 5ST 10-R?

A: Both parts meet identical electrical and mechanical specifications. The primary differences are: (1) Regulatory certifications—5ET 10-R holds CE and SEMKO approval; 5ST 10-R holds CE, CSA, and cURus approval; (2) Breaking capacity—5ET 10-R is rated 150 A; 5ST 10-R is rated 10 A; (3) Melting I²t—5ET 10-R is 400; 5ST 10-R is 439. Selection should align with application-specific regulatory and performance requirements.

Q: Why is 5VT 10 obsolete?

A: The 5VT 10 is classified as obsolete by the manufacturer. Both 5ET 10-R and 5ST 10-R are active products offering equivalent functionality with improved regulatory compliance (ROHS3 certification) and documented electrical performance characteristics.

Q: Are there any compatibility concerns when substituting 5VT 10 with 5ET 10-R or 5ST 10-R?

A: No compatibility concerns exist for direct substitution. All three parts share identical mechanical dimensions (5mm x 20mm), mounting requirements (holder-based), and core electrical ratings (10 A, 250 V AC, slow-blow). Existing fuse holder assemblies will accommodate either substitute without modification.

Q: What certifications apply to the substitute parts?

A: 5ET 10-R carries CE and SEMKO certifications. 5ST 10-R carries CE, CSA, and cURus certifications. Both are ROHS3 compliant. The original 5VT 10 has no specified approval agencies or RoHS compliance documentation.