Equivalent & Substitute Parts for 5ETP 2.5-R

Part Overview

The 5ETP 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 active in production with 779 units currently in stock. Alternative equivalent and substitute parts may be required due to supply chain considerations, regional certification requirements, or specific application parameters that differ between manufacturers.

Substiute Parts

5ETP 2.5-R

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

Current PartRFQ

5STP 2.5-R

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

Parametric EquivalentRFQ

5TTP 2.5-R

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

Parametric EquivalentRFQ

021802.5MXEP

Littelfuse Inc.In Stock: 3166021802.5MXEP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5ETP 2.5-R is determined by the following core parameters:

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

The substitute parts listed below meet all core electrical and mechanical parameters. Differences in Breaking Capacity, Melting I²t, DC Cold Resistance, and manufacturer-specific certifications do not preclude substitution when the core parameters align.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical requirements for direct substitution with the 5ETP 2.5-R. Selection should be based on the following factors:

Bel Fuse Inc. Series (5STP 2.5-R, 5TTP 2.5-R): These parts maintain manufacturer consistency and are produced by the same supplier as the primary part. The 5STP 2.5-R carries certifications including CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE. The 5TTP 2.5-R carries CE, CSA, cULus, and PSE certifications. Both are active products with substantial inventory availability.

Littelfuse Inc. (021802.5MXEP): This cross-manufacturer substitute from the 218 series provides the broadest certification coverage, including CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE. This part is suitable for applications requiring multi-regional compliance. Physical dimensions differ slightly (5.80mm diameter x 22.50mm length versus 5.50mm x 21.00mm), which must be verified for mechanical fit in the target application.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts share identical current rating (2.5 A), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package dimensions (5mm x 20mm axial), and operating temperature range (-55°C ~ 125°C). The 5STP 2.5-R has a lower breaking capacity (35 A versus 150 A) and different melting I²t characteristics, but these differences do not prevent substitution when core electrical parameters match.

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

A: The primary differences are breaking capacity (5ETP: 150 A; 5TTP: 100 A), melting I²t (5ETP: 137; 5TTP: 45.2), and DC cold resistance (5ETP: 0.031 Ohms; 5TTP: 0.06 Ohms). All other electrical and mechanical parameters are identical. Certification coverage also differs, with 5ETP supporting CCC, CE, CSA, cULus, SEMKO, and VDE, while 5TTP supports CE, CSA, cULus, and PSE.

Q: Is the Littelfuse 021802.5MXEP mechanically compatible with the 5ETP 2.5-R?

A: The 021802.5MXEP has slightly larger physical dimensions (5.80mm diameter x 22.50mm length) compared to the 5ETP 2.5-R (5.50mm x 21.00mm). Mechanical fit must be verified in the target application before substitution, particularly in space-constrained designs or legacy equipment with tight component tolerances.

Q: Which substitute part has the best certification coverage?

A: The Littelfuse 021802.5MXEP carries the broadest certification portfolio, including CCC, CE, CSA, K-MARK, PSE, SEMKO, UL, and VDE. This makes it suitable for applications requiring multi-regional compliance. The 5ETP 2.5-R supports CCC, CE, CSA, cULus, SEMKO, and VDE.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The 5ETP 2.5-R, 5STP 2.5-R, 5TTP 2.5-R, and 021802.5MXEP are all ROHS3 compliant and REACH unaffected.