Equivalent & Substitute Parts for Bel Fuse Inc. 5ET 10

Part Overview

The Bel Fuse Inc. 5ET 10 is a 10 A, 250 V AC/DC glass cartridge fuse with a 5mm x 20mm form factor and slow-blow response characteristics. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system maintenance and new design implementations. The 5ET 10 requires a dedicated fuse holder for installation and is designed for applications requiring moderate overcurrent protection with delayed response to transient surges.

Substiute Parts

5ET 10

Bel Fuse Inc.In Stock: 11765ET 10 Datasheet

Current PartRFQ

5ET 10-R

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

DirectRFQ

5ST 10-R

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

Parametric EquivalentRFQ

0218010.TXP

Littelfuse Inc.In Stock: 8220218010.TXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5ET 10 is determined by strict equivalence across the following critical parameters: current rating (10 A), voltage rating (250 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response characteristic (slow blow), and mounting requirement (holder-based installation). All identified substitutes maintain these core electrical and mechanical specifications.

The substitute parts are categorized as follows:

Direct Manufacturer Equivalent: 5ET 10-R (Bel Fuse Inc.) — identical series with active product status and improved RoHS compliance.

Parametric Equivalent: 5ST 10-R (Bel Fuse Inc.) — same electrical ratings and physical form factor, different series designation with expanded approval certifications.

Similar Cross-Manufacturer Substitute: 0218010.TXP (Littelfuse Inc.) — functionally equivalent across all critical parameters with broader international approvals.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete 5ET 10, the 5ET 10-R is the primary direct replacement, maintaining identical electrical characteristics and physical form factor while offering active product status and ROHS3 compliance. This substitution requires no design modification.

The 5ST 10-R provides an alternative within the Bel Fuse Inc. product family with equivalent core specifications and expanded certification coverage (CSA, cURus in addition to CE/SEMKO). This option is suitable for applications requiring broader international regulatory approvals.

The Littelfuse Inc. 0218010.TXP offers cross-manufacturer substitution with the widest approval agency coverage (CE, CSA, KC, PSE, UL, VDE). Physical dimensions show a minor tolerance variation (5.20mm diameter versus 5.10mm), which remains within standard mechanical compatibility for 5mm x 20mm fuse holders. This option is appropriate for applications requiring maximum international certification scope.

All three substitutes maintain the critical electrical parameters (10 A, 250 V AC, slow-blow response) and physical form factor required for direct mechanical and electrical compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 5ET 10-R be used as a direct replacement for the 5ET 10?

A: Yes. The 5ET 10-R maintains identical current rating (10 A), voltage rating (250 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response characteristic (slow blow), and mounting requirement. The primary difference is product status (active versus obsolete) and improved RoHS compliance.

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

A: Both parts share identical electrical ratings and physical form factors. The 5ST 10-R differs in series designation and approval agency coverage. The 5ST 10-R includes CSA and cURus certifications in addition to CE and SEMKO, making it suitable for applications requiring broader regulatory compliance.

Q: Is the Littelfuse 0218010.TXP mechanically compatible with 5mm x 20mm fuse holders?

A: Yes. The 0218010.TXP has a diameter of 5.20mm compared to the 5.10mm specification of the Bel Fuse parts. This 0.10mm variation falls within standard mechanical tolerance for 5mm x 20mm fuse holder compatibility.

Q: What are the key parameters that determine substitutability for this fuse?

A: Current rating (10 A), voltage rating (250 V AC), fuse type (cartridge glass), physical dimensions (5mm x 20mm), response time (slow blow), and mounting type (holder-based) are the critical parameters. All identified substitutes maintain these specifications.

Q: Which substitute offers the broadest international approvals?

A: The Littelfuse Inc. 0218010.TXP carries approvals from CE, CSA, KC, PSE, UL, and VDE, providing the widest regulatory coverage across international markets.

Q: Are all substitutes RoHS3 compliant?

A: Yes. The 5ET 10-R, 5ST 10-R, and 0218010.TXP are all ROHS3 compliant. The original 5ET 10 is RoHS non-compliant.