Equivalent & Substitute Parts for 5TTP 2.5-R Glass Cartridge Fuse

Part Overview

The 5TTP 2.5-R is a 2.5 A, 250 V AC/DC slow-blow glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm axial through-hole package. This component is classified as Active and maintains full RoHS3 compliance. Alternative part numbers within the same electrical and mechanical specifications are available to support supply chain flexibility and inventory management across equivalent product lines.

Substiute Parts

5TTP 2.5-R

Bel Fuse Inc.In Stock: 18205TTP 2.5-R Datasheet

Current PartRFQ

5ETP 2.5-R

Bel Fuse Inc.In Stock: 8395ETP 2.5-R Datasheet

Parametric EquivalentRFQ

5STP 2.5-R

Bel Fuse Inc.In Stock: 21485STP 2.5-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5TTP 2.5-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 2.5 A (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The substitute parts 5ETP 2.5-R and 5STP 2.5-R meet all mandatory electrical and mechanical compatibility criteria. Variations in Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications do not affect functional interchangeability within the specified electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

All three part numbers—5TTP 2.5-R, 5ETP 2.5-R, and 5STP 2.5-R—are Active products manufactured by Bel Fuse Inc. and maintain ROHS3 compliance. Selection between these equivalents should be based on:

1. Approval agency requirements for the target application. The 5ETP 2.5-R and 5STP 2.5-R carry expanded certification coverage (CCC, SEMKO, VDE) compared to the 5TTP 2.5-R.

2. Breaking Capacity requirements. The 5ETP 2.5-R provides the highest breaking capacity at 150A, while the 5STP 2.5-R provides the lowest at 35A. The 5TTP 2.5-R offers 100A.

3. DC Cold Resistance specifications. The 5STP 2.5-R exhibits the lowest resistance at 0.02 Ohms, followed by the 5ETP 2.5-R at 0.031 Ohms, and the 5TTP 2.5-R at 0.06 Ohms.

All parts are electrically and mechanically interchangeable within circuits designed for 2.5 A, 250 V AC/DC slow-blow protection in 5mm x 20mm through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can 5ETP 2.5-R and 5STP 2.5-R be used interchangeably with 5TTP 2.5-R in the same circuit?

A: Yes. All three part numbers share identical electrical ratings (2.5 A, 250 V AC/DC), fuse type (Cartridge, Glass), response time (Slow Blow), and mechanical package (5mm x 20mm axial through-hole). They are functionally equivalent for circuit protection applications within these specifications.

Q: What is the difference between these substitute parts?

A: The primary differences are Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications. These variations do not affect interchangeability for standard 2.5 A, 250 V slow-blow protection but may be relevant for specific regulatory or performance requirements.

Q: Which part should I select if my application requires multiple international certifications?

A: The 5ETP 2.5-R and 5STP 2.5-R both carry expanded certification coverage including CCC, CE, CSA, SEMKO, and VDE. The 5TTP 2.5-R carries CE, CSA, cULus, and PSE certifications. Select based on your specific regulatory requirements.

Q: Are there any temperature or environmental limitations that differ between these parts?

A: No. All three parts operate across the identical temperature range of -55°C to 125°C and maintain ROHS3 compliance.

Q: Can I substitute based on Breaking Capacity alone?

A: Breaking Capacity is not a substitution criterion. All three parts are equivalent for 2.5 A, 250 V applications. Breaking Capacity differences reflect design variations but do not affect interchangeability within the specified electrical parameters.