Bel Fuse Inc. 5TTP 1.6 Equivalent & Substitute Parts

Part Overview

The 5TTP 1.6 is a 1.6 A 250 V AC/DC fuse cartridge with glass construction, designed for through-hole mounting in 5mm x 20mm (axial) form factor. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The 5TTP 1.6 series provides slow-blow response characteristics suitable for applications requiring transient current tolerance.

Substiute Parts

5TTP 1.6

Bel Fuse Inc.In Stock: 10205TTP 1.6 Datasheet

Current PartRFQ

5TTP 1.6-R

Bel Fuse Inc.In Stock: 21825TTP 1.6-R Datasheet

DirectRFQ

5ETP 1.6-R

Bel Fuse Inc.In Stock: 21735ETP 1.6-R Datasheet

Parametric EquivalentRFQ

5STP 1.6-R

Bel Fuse Inc.In Stock: 10985STP 1.6-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5TTP 1.6 is determined by strict equivalence across the following parameters:

• Current Rating: 1.6 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 (Axial) (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 mandatory electrical and mechanical parameters. Variations in secondary characteristics such as breaking capacity, melting I²t, DC cold resistance, and approval agencies do not disqualify substitution but may influence selection based on application-specific requirements.

Parameter Comparison

Engineering Selection Recommendations

5TTP 1.6-R (Direct Manufacturer Equivalent)

The 5TTP 1.6-R is the active production equivalent of the obsolete 5TTP 1.6. This part maintains identical electrical and mechanical specifications while offering improved RoHS3 compliance. The 5TTP 1.6-R is the primary recommendation for direct replacement in existing designs. Approval agencies include CE, CSA, cULus, and PSE.

5ETP 1.6-R (Parametric Equivalent)

The 5ETP 1.6-R meets all mandatory substitution parameters and is an active product. This part features enhanced breaking capacity (150 A versus 100 A) and higher melting I²t (62 versus 19.7), providing greater fault tolerance. The 5ETP 1.6-R carries broader regulatory approvals including CCC, CE, CSA, cULus, SEMKO, and VDE. Selection of this part is appropriate when enhanced breaking capacity is beneficial to system design.

5STP 1.6-R (Parametric Equivalent)

The 5STP 1.6-R meets all mandatory substitution parameters and is an active product. This part features lower breaking capacity (35 A) and lower melting I²t (6.9), making it suitable for applications with tighter fault current constraints. The 5STP 1.6-R carries the broadest regulatory approvals including CCC, CE, CSA, cULus, IMQ, SEMKO, and VDE. Selection of this part is appropriate when lower breaking capacity aligns with application requirements.

Frequently Asked Questions (FAQ)

Q: Can I use 5TTP 1.6-R as a direct replacement for the obsolete 5TTP 1.6?

A: Yes. The 5TTP 1.6-R is the active production equivalent and maintains identical electrical and mechanical specifications. It is the recommended replacement for existing designs.

Q: What is the difference between 5TTP 1.6-R, 5ETP 1.6-R, and 5STP 1.6-R?

A: All three parts meet the mandatory substitution parameters: 1.6 A current rating, 250 V AC voltage rating, slow-blow response, and 5mm x 20mm axial package. They differ in breaking capacity and melting I²t characteristics. The 5TTP 1.6-R maintains the original specification. The 5ETP 1.6-R provides higher breaking capacity (150 A) and melting I²t (62). The 5STP 1.6-R provides lower breaking capacity (35 A) and melting I²t (6.9).

Q: Are all substitute parts RoHS compliant?

A: The 5TTP 1.6 is RoHS non-compliant. All substitute parts (5TTP 1.6-R, 5ETP 1.6-R, and 5STP 1.6-R) are ROHS3 compliant, making them suitable for applications requiring RoHS compliance.

Q: Do all substitute parts have the same physical dimensions?

A: Yes. All parts share the same 5mm x 20mm (axial) package dimensions and through-hole mounting type, ensuring mechanical compatibility in existing PCB designs.

Q: Which regulatory approvals should I prioritize?

A: Selection depends on target markets. The 5TTP 1.6-R carries CE, CSA, cULus, and PSE approvals. The 5ETP 1.6-R and 5STP 1.6-R carry broader approvals including CCC, CE, CSA, cULus, SEMKO, and VDE. Verify specific regulatory requirements for your application region.

Q: Can I interchange these parts within the same circuit?

A: Electrical and mechanical interchange is possible due to matching current rating, voltage rating, response time, and package specifications. However, differences in breaking capacity and melting I²t may affect circuit protection characteristics. Verify that the selected part's breaking capacity and melting I²t are appropriate for your application's fault current environment.