Equivalent & Substitute Parts for 5TT 10 Ceramic Fuse

Part Overview

The 5TT 10 is a 10A 125VAC ceramic cartridge fuse manufactured by Bel Fuse Inc., designed for 5mm x 20mm holder applications. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing system maintenance and component procurement. The slow-blow response characteristic and ceramic construction provide protection in applications requiring delayed response to transient overcurrent conditions.

Substiute Parts

5TT 10

Bel Fuse Inc.In Stock: 11565TT 10 Datasheet

Current PartRFQ

5TT 10-R

Bel Fuse Inc.In Stock: 20335TT 10-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5TT 10 is based on electrical and mechanical parameter equivalence. The following criteria determine valid substitutes:

• Current Rating: 10 A (exact match required)
• Voltage Rating: 125 V AC (exact match required)
• Fuse Type: Cartridge, Ceramic (exact match required)
• Response Time: Slow Blow (exact match required)
• Physical Package: 5mm x 20mm (exact match required for holder compatibility)
• Breaking Capacity: 1kA (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The 5TT 10-R meets all substitution criteria as a direct equivalent from the same manufacturer and series.

Parameter Comparison

Engineering Selection Recommendations

The 5TT 10-R is the direct substitute for the obsolete 5TT 10. Both components share identical electrical and mechanical specifications, ensuring functional equivalence in 5mm x 20mm holder applications rated for 10A at 125VAC with slow-blow response.

The 5TT 10-R offers the advantage of active product status, ensuring continued availability for procurement. Additionally, the 5TT 10-R carries ROHS3 compliance, meeting current environmental regulatory requirements, whereas the original 5TT 10 is RoHS non-compliant. Both components maintain equivalent approval certifications (CE, CSA, PSE) with the 5TT 10-R including cURus certification.

DC cold resistance differs between the two parts (0.007 Ohms for 5TT 10 versus 0.086 Ohms for 5TT 10-R); however, this parameter does not affect substitution validity for AC-rated fuse applications.

Frequently Asked Questions (FAQ)

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

A: Yes. The 5TT 10-R is a direct substitute meeting all electrical and mechanical parameters: 10A current rating, 125V AC voltage rating, ceramic cartridge construction, slow-blow response, 5mm x 20mm physical dimensions, 1kA breaking capacity, and -55°C to 125°C operating temperature range.

Q: What is the primary reason to transition from 5TT 10 to 5TT 10-R?

A: The 5TT 10 is classified as obsolete. The 5TT 10-R maintains active product status, ensuring reliable component availability and supply chain continuity.

Q: Are there compliance differences between these parts?

A: The 5TT 10-R is ROHS3 compliant, while the 5TT 10 is RoHS non-compliant. Both components carry CE, CSA, and PSE certifications. The 5TT 10-R additionally includes cURus certification.

Q: Will the 5TT 10-R fit existing 5mm x 20mm fuse holders?

A: Yes. Both components share identical physical dimensions (0.201" diameter x 0.787" length / 5.10mm x 20.00mm) and require the same holder type.

Q: Is there a difference in fuse response characteristics?

A: No. Both the 5TT 10 and 5TT 10-R are slow-blow ceramic cartridge fuses with identical melting I²t values (467), ensuring equivalent protection response in overcurrent conditions.