5TTP 400-R Equivalent & Substitute Parts

Part Overview

The 5TTP 400-R is a 400 mA, 250 V AC/DC slow-blow glass cartridge fuse in 5mm x 20mm (axial) through-hole package. Manufactured by Bel Fuse Inc., this component is classified as Active product status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when design requirements permit alternative selections within specified electrical and mechanical parameters.

Substiute Parts

5TTP 400-R

Bel Fuse Inc.In Stock: 19055TTP 400-R Datasheet

Current PartRFQ

5STP 400-R

Bel Fuse Inc.In Stock: 17005STP 400-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5TTP 400-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 400 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Slow Blow (exact match required)
• Package / Case: 5mm x 20mm (Axial) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)

The 5STP 400-R meets all critical substitution criteria and is classified as a parametric equivalent. Both parts share identical electrical ratings, physical dimensions, and thermal operating range. Differences in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications do not preclude substitution when these parameters fall within acceptable design tolerances.

Parameter Comparison

Engineering Selection Recommendations

Both the 5TTP 400-R and 5STP 400-R are Active product status components manufactured by Bel Fuse Inc. and comply with ROHS3 requirements. The 5STP 400-R carries broader regulatory approvals (CCC, IMQ, SEMKO, VDE) in addition to the CE, CSA, and cULus certifications present on the 5TTP 400-R. Selection between these parts should be based on specific application requirements regarding breaking capacity and regulatory compliance scope. Both parts are suitable for circuits requiring 400 mA protection at 250 V AC/DC with slow-blow response characteristics in standard 5mm x 20mm through-hole configurations.

Frequently Asked Questions (FAQ)

Q: Can the 5STP 400-R be used as a direct replacement for the 5TTP 400-R?

A: Yes. Both parts share identical current rating (400 mA), 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). Physical and electrical compatibility is confirmed.

Q: What are the differences between these two parts?

A: The 5STP 400-R has a lower breaking capacity (35A versus 100A) and lower melting I²t (0.81 versus 1.65). The 5STP 400-R also carries additional regulatory approvals (CCC, IMQ, SEMKO, VDE). DC cold resistance differs (0.82 Ohms versus 1.45 Ohms).

Q: Are both parts suitable for the same circuit applications?

A: Substitution is valid when application requirements do not mandate the higher breaking capacity of the 5TTP 400-R. Design specifications must confirm that the 5STP 400-R's 35A breaking capacity is acceptable for the intended circuit protection scheme.

Q: Do both parts meet RoHS compliance?

A: Yes. Both the 5TTP 400-R and 5STP 400-R are ROHS3 Compliant.

Q: What regulatory certifications apply to each part?

A: The 5TTP 400-R carries CE, CSA, and cULus approvals. The 5STP 400-R carries CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE approvals. Application requirements may dictate which certification scope is necessary.