5TTP 100-R Equivalent & Substitute Parts

Part Overview

The 5TTP 100-R is a 100 mA, 250 V AC/DC slow blow fuse cartridge manufactured by Bel Fuse Inc. in a 5mm x 20mm glass through-hole package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations. Substitute parts must maintain identical electrical ratings and mechanical compatibility to ensure proper circuit protection without modification to existing designs.

Substiute Parts

5TTP 100-R

Bel Fuse Inc.In Stock: 12375TTP 100-R Datasheet

Current PartRFQ

0239.100MXEP

Littelfuse Inc.In Stock: 10690239.100MXEP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5TTP 100-R is determined by strict equivalence across the following critical parameters:

• Current Rating: 100 mA (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 (minimum requirement)

The substitute part 0239.100MXEP (Littelfuse Inc., Series 239) meets all mandatory electrical and mechanical parameters, confirming direct substitutability in applications currently using the 5TTP 100-R.

Parameter Comparison

Engineering Selection Recommendations

The 0239.100MXEP from Littelfuse Inc. is the direct equivalent substitute for the obsolete 5TTP 100-R. Both components share identical electrical specifications (100 mA, 250 V AC, slow blow response) and mechanical form factor (5mm x 20mm through-hole cartridge). The substitute part carries active product status, ensuring continued availability and supply chain reliability.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental regulatory requirements. The 0239.100MXEP holds CE and UL certifications, while the original 5TTP 100-R includes CSA and cULus certifications. For applications requiring specific regional certifications, verification against local regulatory requirements is necessary.

The dimensional variance of 0.5mm in length (21.00mm vs. 21.50mm) falls within standard mechanical tolerances for through-hole fuse cartridges and does not impact functional compatibility or mounting in standard fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the 0239.100MXEP directly replace the 5TTP 100-R without circuit modification?

A: Yes. Both components meet identical electrical ratings (100 mA, 250 V AC, slow blow) and mechanical specifications (5mm x 20mm through-hole cartridge). No circuit modification is required.

Q: What is the significance of the 0.5mm length difference between the two parts?

A: The 5TTP 100-R measures 21.00mm in length while the 0239.100MXEP measures 21.50mm. This variance is within standard mechanical tolerances for 5mm x 20mm fuse cartridges and does not affect compatibility with standard through-hole fuse holders or sockets.

Q: Are there differences in breaking capacity between these parts?

A: Yes. The 5TTP 100-R has a breaking capacity of 100A at rated voltage, while the 0239.100MXEP has a breaking capacity of 35A. Both values exceed the 100 mA rated current, ensuring adequate fault protection. Application-specific requirements may necessitate evaluation of this parameter.

Q: Which certifications apply to the substitute part?

A: The 0239.100MXEP holds CE and UL certifications. The original 5TTP 100-R includes CE, CSA, and cULus certifications. Verify that the substitute part's certification profile meets your application's regional and industry-specific requirements.

Q: Is the 0239.100MXEP available in the same packaging as the original?

A: The 0239.100MXEP is supplied in bulk packaging, whereas packaging information for the 5TTP 100-R was not specified. Confirm packaging requirements with your procurement process.