Cable ferrules Rittal 4051.728, polypropylene orange, 4.8 mm diameter, 10 mm length, pack of 500

Rittal 4051.728 cable ferrules are polypropylene (PP) insulated end sleeves designed for terminating stranded conductors. Each ferrule measures 10 mm in length with an outer diameter of approximately 4.8 mm and is supplied in a pack of 500. These orange ferrules protect conductor strands from fraying, provide a reliable, compact termination for screw and spring-clamp connections, and are suitable for use in control cabinets, electrical panels and industrial wiring installations.

Advantages

Polypropylene insulation provides electrical insulation and mechanical protection while remaining lightweight and resistant to many common environmental influences. The uniform crimpable barrel and consistent outer diameter ensure repeatable, secure terminations that reduce the risk of loose strands and improve current-carrying contact in terminal blocks and relays. Supplied as a bulk pack of 500 pieces, they are convenient for repetitive assembly work and maintenance tasks.

Suitable for

• Terminating stranded conductors in control cabinets and distribution panels
• Prepared connections for screw terminals and spring-clamp terminals
• Industrial machine wiring and fieldbus installations
• Electrical maintenance and series production where many terminations are required

When it may not be suitable

These ferrules are intended for stranded conductors and may not be suitable for solid conductors or for conductors with insulation diameters that do not match the ferrule inner diameter. They are polypropylene-insulated and therefore are not designed for applications requiring high temperature resistance beyond the material limits of PP or for environments with aggressive chemicals that can degrade polypropylene.

Key specifications

• Material: Polypropylene insulated sleeve with metal barrel
• Outer diameter: approx. 4.8 mm
• Length: 10 mm
• Colour: Orange
• Pack quantity: 500 pieces
• Application: Termination of stranded conductors for screw and spring-clamp connections

How to use

Strip the conductor to the recommended length so that all strands seat into the metal barrel of the ferrule. Insert the stripped conductor fully into the ferrule until the insulation meets the sleeve. Crimp the ferrule using an appropriate ferrule crimping tool or hand crimper sized for the ferrule dimensions to ensure a secure, compact termination. After crimping, verify that the ferrule is firmly attached and that no conductor strands protrude. Proceed to insert the terminated conductor into the terminal and tighten to the specified torque for the connection type.

What to consider before purchase

• Confirm compatibility with conductor cross-section and insulation diameter (suitable for stranded conductors matching the ferrule inner dimensions)
• Ensure the ferrule length and outer diameter fit the intended terminal or connector
• Choose a crimping tool that matches the ferrule size for reliable crimps
• Assess environmental and temperature requirements to determine if polypropylene insulation is acceptable

Usage recommendations

Use a dedicated insulated ferrule crimping tool sized for 4.8 mm outer diameter / 10 mm length ferrules to achieve consistent, low-resistance connections; store the pack in a dry place to preserve polypropylene properties and sort ferrules by colour coding to streamline installation in control panels.