5TT 100 Equivalent & Substitute Parts Reference

Part Overview

The 5TT 100 is a 100 mA, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing system maintenance and design updates. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and functional characteristics to ensure direct compatibility in existing fuse holder assemblies.

Substiute Parts

5TT 100

Bel Fuse Inc.In Stock: 11035TT 100 Datasheet

Current PartRFQ

5ST 100-R

Bel Fuse Inc.In Stock: 68035ST 100-R Datasheet

Parametric EquivalentRFQ

0218.100HXP

Littelfuse Inc.In Stock: 8090218.100HXP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 5TT 100 are qualified based on the following critical parameters:

• Current rating of 100 mA
• Voltage rating of 250 V AC
• Slow-blow response characteristic
• 5mm x 20mm physical dimensions
• Glass cartridge construction
• Holder-based mounting requirement
• Operating temperature range of -55°C to 125°C

Two substitute parts meet these criteria: the 5ST 100-R (Bel Fuse Inc.) and the 0218.100HXP (Littelfuse Inc.). Both maintain identical electrical and mechanical specifications, enabling direct substitution in applications currently using the 5TT 100.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts are active products with expanded regulatory certifications compared to the obsolete 5TT 100. The 5ST 100-R maintains manufacturer continuity with Bel Fuse Inc. and includes ROHS3 compliance. The 0218.100HXP from Littelfuse Inc. offers equivalent electrical performance with additional international certifications including K-MARK and expanded agency approvals.

Selection between the two substitutes should be based on supply chain preferences, existing vendor relationships, and specific regional compliance requirements. Both parts satisfy the electrical and mechanical requirements for direct replacement in applications currently using the 5TT 100.

Frequently Asked Questions (FAQ)

Q: Can the 5ST 100-R and 0218.100HXP be used interchangeably with the 5TT 100?

A: Yes. Both substitute parts maintain identical current ratings (100 mA), voltage ratings (250 V AC), response characteristics (slow-blow), and physical dimensions (5mm x 20mm). They are compatible with any fuse holder designed for the 5TT 100.

Q: What is the primary reason to transition from the 5TT 100?

A: The 5TT 100 is classified as obsolete. The 5ST 100-R and 0218.100HXP are active products with current manufacturing support and improved regulatory compliance (ROHS3).

Q: Are there dimensional differences between the substitute parts?

A: The 5ST 100-R maintains the exact 5mm x 20mm specification. The 0218.100HXP has a diameter of 5.20mm compared to 5.10mm for the main part, remaining within the 5mm x 20mm package classification and compatible with standard fuse holders.

Q: Which substitute part has better regulatory coverage?

A: The 0218.100HXP includes certifications from CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. The 5ST 100-R includes CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE. Selection depends on specific regional requirements for your application.

Q: Are both substitutes RoHS compliant?

A: Yes. Both the 5ST 100-R and 0218.100HXP are ROHS3 compliant, whereas the 5TT 100 is non-compliant.