Equivalent & Substitute Parts for 5TTP 2.5 Glass Cartridge Fuse

Part Overview

The 5TTP 2.5 is a 2.5 A, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm axial package format, manufactured by Bel Fuse Inc. This part is classified as obsolete. Finding equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements where the original part is no longer readily sourced.

Substiute Parts

5TTP 2.5

Bel Fuse Inc.In Stock: 7275TTP 2.5 Datasheet

Current PartRFQ

5TTP 2.5-R

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

DirectRFQ

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 for the 5TTP 2.5 is determined by strict equivalence across the following parameters:

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

All substitute parts listed below meet these core electrical and mechanical parameters. Differences in breaking capacity, melting I²t, DC cold resistance, and approval agencies are secondary characteristics that may vary between series while maintaining functional equivalence for the specified application.

Parameter Comparison

Engineering Selection Recommendations

5TTP 2.5-R is the direct replacement for the obsolete 5TTP 2.5. Both parts belong to the same series and share identical electrical and mechanical specifications. The primary advantage of 5TTP 2.5-R is its active product status and ROHS3 compliance, making it the preferred choice for new designs and production continuity.

5ETP 2.5-R and 5STP 2.5-R are parametric equivalents that maintain all core functional parameters (current, voltage, response time, package, mounting) but differ in breaking capacity and melting I²t characteristics. These parts are suitable for applications where the original breaking capacity specification is not a limiting constraint. Both are active products with ROHS3 compliance and expanded approval agency certifications.

Selection between 5ETP 2.5-R and 5STP 2.5-R should be based on application-specific breaking capacity requirements. The 5ETP 2.5-R offers higher breaking capacity (150 A) and higher melting I²t (137), while the 5STP 2.5-R provides lower breaking capacity (35 A) and lower melting I²t (20).

Frequently Asked Questions (FAQ)

Q: Can 5TTP 2.5-R be used as a direct replacement for 5TTP 2.5?

A: Yes. Both parts are from the same series with identical current rating, voltage rating, response time, package dimensions, and operating temperature range. The primary difference is product status and RoHS compliance. 5TTP 2.5-R is the active equivalent.

Q: What is the difference between 5ETP 2.5-R and 5STP 2.5-R?

A: Both maintain the same 2.5 A current rating and 250 V voltage rating in the same 5mm x 20mm package. The key differences are breaking capacity (5ETP: 150 A vs. 5STP: 35 A) and melting I²t (5ETP: 137 vs. 5STP: 20). Selection depends on the application's breaking capacity requirement.

Q: Are all substitute parts RoHS compliant?

A: The original 5TTP 2.5 is RoHS non-compliant. All substitute parts (5TTP 2.5-R, 5ETP 2.5-R, 5STP 2.5-R) are ROHS3 compliant, making them suitable for applications requiring RoHS compliance.

Q: Can I use 5ETP 2.5-R or 5STP 2.5-R in place of 5TTP 2.5?

A: Yes, provided the application does not have specific breaking capacity constraints. All three substitute parts meet the core electrical and mechanical parameters. Verify that the breaking capacity and melting I²t of the selected substitute are appropriate for your circuit protection requirements.

Q: What approval agencies certify these fuses?

A: 5TTP 2.5-R carries CE, CSA, cULus, and PSE certifications. 5ETP 2.5-R carries CCC, CE, CSA, cULus, SEMKO, and VDE certifications. 5STP 2.5-R carries CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE certifications. Verify that the selected part meets your regional compliance requirements.