Ferrule Rittal AS 4051.623, copper polypropylene insulated, 1.5 mm² conductor, 12 mm length, pack of 500

Rittal AS 4051.623 ferrules are copper conductors with polypropylene (PP) insulation designed to terminate 1.5 mm² single-core wires. Each insulated sleeve measures 12 mm in length and has an outer diameter of 3.5 mm, providing a consistent contact area for crimped connections. Supplied in a pack of 500, these ferrules are intended for use in control cabinets, switchgear and general electrical installations where reliable, repeatable terminations are required.

Advantages

These ferrules combine a copper conductor with a polypropylene insulated collar to offer good electrical conductivity together with mechanical protection for the wire end. The uniform sleeve length and diameter support consistent crimp quality, reduce stray wire strands, and improve insertion into terminal blocks and screw connections. The polypropylene insulation provides electrical isolation and a degree of strain relief while remaining compatible with common hand and pneumatic crimping tools.

Suitable for

• Terminating 1.5 mm² solid or stranded single-core copper conductors
• Control cabinets, distribution boards and switchgear wiring
• Industrial and building electrical installations requiring standardized ferrules
• Applications where a pack quantity of 500 supports batch wiring and maintenance

When it may not be suitable

These ferrules are specifically sized for 1.5 mm² conductors; they will not provide a correct fit for significantly larger or smaller wire cross-sections. They are intended for copper conductors and are not suitable for bare aluminium conductors without appropriate treatment or transition sleeves. For high-temperature environments beyond typical installation ranges, polypropylene insulation may not offer sufficient thermal resistance and alternative materials should be considered.

Key specifications

• Conductor material: copper
• Insulation material: polypropylene (PP)
• Nominal conductor cross-section: 1.5 mm²
• Sleeve length: 12 mm
• Outer diameter (insulation): approx. 3.5 mm
• Pack quantity: 500 pieces
• With insulated plastic collar for improved handling

How to use

Strip the conductor to the appropriate length so that the bare wire fully enters the ferrule sleeve without excess exposed conductor. Insert the wire strands straight into the copper sleeve and position the insulated collar against the insulation of the cable. Use a suitable crimping tool matched to 1.5 mm² ferrules and apply consistent pressure until a secure crimp is formed. After crimping, check that there are no stray strands, that the ferrule is firmly attached and that the assembly inserts smoothly into the intended terminal or connector.

What to consider before purchase

• Ensure compatibility with 1.5 mm² copper conductors used in your installation
• Verify that polypropylene insulation is acceptable for your operating temperature range
• Confirm that your crimping tools support insulated ferrules of this size
• Assess whether a pack of 500 matches your project or maintenance needs

Usage recommendations

For reliable results, use a calibrated crimping tool designed for insulated ferrules and inspect a sample crimp for mechanical integrity and electrical continuity before committing to large-scale assembly. Store ferrules in a dry environment and handle them to avoid contamination of the copper sleeve.