Terminal ferrules Rittal AS 4050.786, copper/PP, 6.3 mm diameter, 18 mm length, pack of 100

Rittal AS 4050.786 terminal ferrules are designed to protect insulated wire ends and create secure conductor connections in electrical assemblies. Each ferrule consists of a copper tube for reliable electrical contact and a polypropylene (PP) collar in black that facilitates handling and crimping. The ferrules have an inner diameter suited for 6.3 mm connections and an overall tube length of 18 mm; they are supplied in packs of 100 for routine installation and maintenance tasks.

Advantages

These terminal ferrules improve the mechanical stability and electrical reliability of stranded conductors by preventing fraying and ensuring consistent contact in screw terminals. The copper sleeve provides low electrical resistance and good conductivity, while the PP collar supports the crimping process and offers color-coded handling. Supplied in a practical pack quantity, they streamline repetitive wiring work and reduce the risk of loose or inconsistent terminations.

Suitable for

• Crimp termination of multi-strand flexible conductors requiring reliable screw-terminal contact
• Control cabinets, terminal blocks and distribution panels in industrial or commercial equipment
• Maintenance, panel building and repetitive wiring tasks where consistent terminations are needed
• Applications where a 6.3 mm ferrule diameter and an 18 mm tube length are appropriate

When it may not be suitable

These ferrules are intended for use with stranded copper conductors that match the specified diameter; they are not suitable for solid-core wires where ferrules do not provide benefit. They also are not a substitute for insulated bootlace lugs or large cable terminations designed for high-current bus bars or very large conductor cross-sections.

Key specifications

• Material of conductor sleeve: copper
• Collar material: polypropylene (PP), black
• Nominal ferrule diameter: 6.3 mm
• Tube length: 18 mm
• Pack quantity: 100 pieces

How to use

Strip the insulation from the stranded conductor to the correct length, insert the conductor fully into the copper tube so strands are contained, then crimp the ferrule using an appropriately sized crimping tool or crimping die for 6.3 mm ferrules. After crimping, check that the collar is seated against the insulation and that the crimp is tight with no loose strands. Insert the ferrule into the screw terminal and tighten the terminal screw to the manufacturer's recommended torque.

What to consider before purchase

• Confirm conductor cross-section and strand size compatibility with a 6.3 mm ferrule
• Ensure the chosen crimping tool and die match the ferrule dimensions
• Verify that the 18 mm tube length provides sufficient insertion depth for your terminal blocks
• Consider pack size (100 pieces) relative to project or maintenance needs

Usage recommendations

Use a dedicated crimping tool with matching dies and perform a pull test on sample terminations to verify mechanical integrity. Store ferrules in a dry environment to avoid contamination of contact surfaces prior to installation.