5TTP 500 Equivalent & Substitute Parts Reference

Part Overview

The 5TTP 500 is a 500 mA, 250 V AC/DC slow-blow glass cartridge fuse with a 5mm x 20mm axial form factor, manufactured by Bel Fuse Inc. This component is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing system maintenance and new design implementations. The fuse is designed for through-hole mounting applications requiring reliable overcurrent protection in industrial and commercial equipment.

Substiute Parts

5TTP 500

Bel Fuse Inc.In Stock: 12485TTP 500 Datasheet

Current PartRFQ

5TTP 500-R

Bel Fuse Inc.In Stock: 21555TTP 500-R Datasheet

DirectRFQ

5STP 500-R

Bel Fuse Inc.In Stock: 13245STP 500-R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5TTP 500 is determined by the following critical parameters that must remain constant:

• Current Rating: 500 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 to 125°C (minimum requirement)

Parameters that may vary within acceptable engineering tolerances include Breaking Capacity, Melting I²t, DC Cold Resistance, and approval agency certifications, provided the substitute part meets or exceeds the original specifications where applicable.

Parameter Comparison

Engineering Selection Recommendations

The 5TTP 500-R is the primary direct substitute for the obsolete 5TTP 500. Both parts share identical electrical and mechanical specifications with a Breaking Capacity of 100 A and Melting I²t of 2.49 (compared to 2.5 in the original). The 5TTP 500-R is currently in active production status with improved RoHS3 compliance and enhanced certification coverage (cULus certification added). This part is recommended for direct replacement in existing designs.

The 5STP 500-R is a parametric equivalent that maintains all critical functional parameters: 500 mA current rating, 250 V AC voltage rating, slow-blow response, and 5mm x 20mm form factor. However, the Breaking Capacity is reduced to 35 A with a Melting I²t of 1.4. The 5STP 500-R is suitable for applications where the lower breaking capacity is acceptable and provides the broadest certification coverage including CCC, VDE, IMQ, and SEMKO approvals. This part is also in active production with ROHS3 compliance.

Selection between 5TTP 500-R and 5STP 500-R should be based on system breaking capacity requirements. Applications requiring 100 A breaking capacity must use 5TTP 500-R. Applications with lower fault current levels may utilize 5STP 500-R, which offers expanded international certifications.

Frequently Asked Questions (FAQ)

Q: Can the 5STP 500-R be used as a direct replacement for the 5TTP 500?

A: The 5STP 500-R is a parametric equivalent that maintains all critical electrical and mechanical parameters. However, the Breaking Capacity differs (35 A versus 100 A). Use 5STP 500-R only if your application's maximum fault current does not exceed 35 A at 250 V AC.

Q: What is the difference between the 5TTP 500-R and 5STP 500-R?

A: Both parts have identical current rating, voltage rating, response time, and form factor. The primary differences are Breaking Capacity (100 A vs. 35 A), Melting I²t (2.49 vs. 1.4), DC Cold Resistance (0.981 Ohm vs. 0.54 Ohm), and approval agency certifications. The 5STP 500-R has broader international certification coverage.

Q: Is the 5TTP 500-R RoHS compliant?

A: Yes, the 5TTP 500-R is ROHS3 compliant, whereas the original 5TTP 500 is RoHS non-compliant. This makes 5TTP 500-R suitable for applications with RoHS compliance requirements.

Q: Will these fuses fit in the same PCB footprint?

A: Yes. All three parts (5TTP 500, 5TTP 500-R, and 5STP 500-R) share identical mechanical dimensions of 5mm x 20mm (Axial) with through-hole mounting, ensuring compatibility with existing PCB designs.

Q: What certifications should I consider for my application?

A: The 5TTP 500-R carries CE, CSA, and cULus certifications. The 5STP 500-R carries CCC, CE, CSA, cURus, IMQ, SEMKO, and VDE certifications. Select based on your regional and industry-specific certification requirements.