5TTP 300 Equivalent & Substitute Parts

Part Overview

The 5TTP 300 is a 300 mA, 250 V AC/DC slow-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing design and procurement requirements. The 5TTP series provides reliable overcurrent protection in through-hole applications with established international certifications.

Substiute Parts

5TTP 300

Bel Fuse Inc.In Stock: 10465TTP 300 Datasheet

Current PartRFQ

5TTP 300-R

Bel Fuse Inc.In Stock: 12965TTP 300-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 5TTP 300-R qualifies as a direct substitute based on matching electrical and mechanical parameters. Substitution criteria are determined by the following parameters:

• Current Rating: 300 mA (identical)
• Voltage Rating (AC): 250 V (identical)
• Fuse Type: Cartridge, Glass (identical)
• Response Time: Slow Blow (identical)
• Package / Case: 5mm x 20mm (Axial) (identical)
• Mounting Type: Through Hole (identical)
• Breaking Capacity @ Rated Voltage: 100 A (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)

The 5TTP 300-R maintains full electrical and mechanical compatibility with the original 5TTP 300, with the primary distinction being active product status and updated compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The 5TTP 300-R is the appropriate selection for new designs and procurement activities. The original 5TTP 300 is obsolete and no longer actively manufactured. The 5TTP 300-R maintains identical electrical and mechanical specifications while offering active product status and current compliance certifications including ROHS3 compliance and cULus approval. Both parts are manufactured by Bel Fuse Inc. and are functionally interchangeable in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the 5TTP 300-R be used as a direct replacement for the 5TTP 300?

A: Yes. The 5TTP 300-R provides identical current rating (300 mA), voltage rating (250 V AC), response time (slow blow), package dimensions (5mm x 20mm axial), and mounting type (through hole). All critical electrical and mechanical parameters match.

Q: What is the difference between the 5TTP 300 and 5TTP 300-R?

A: The primary differences are product status and compliance certifications. The 5TTP 300 is obsolete, while the 5TTP 300-R is active. The 5TTP 300-R includes ROHS3 compliance and cULus certification, whereas the original includes UL certification. Melting I²t and DC cold resistance values differ slightly but remain within acceptable operating parameters.

Q: Are there any package or form factor differences?

A: No. Both parts use identical 5mm x 20mm axial glass cartridge packaging and through-hole mounting configuration.

Q: What certifications apply to the 5TTP 300-R?

A: The 5TTP 300-R carries CE, CSA, and cULus approvals. It is ROHS3 compliant and REACH unaffected.

Q: Is the 5TTP 300-R available in different packaging options?

A: The 5TTP 300-R is supplied in bulk packaging, whereas the original 5TTP 300 packaging type is not specified in the available data.