Ferrule Rittal AS 4051.577 — copper, polypropylene insulated, 0.75 mm² conductor, 8 mm length, pack of 500

Rittal AS 4051.577 ferrules are insulated wire end sleeves intended for reliable termination of stranded conductors. Each ferrule has a copper conductor tube with polypropylene (PP) insulation and is sized for 0.75 mm² conductors. At 8 mm nominal length and supplied in a pack of 500, these ferrules provide consistent crimping results for control cabinets, terminal blocks and general electrical installations where secure, vibration-resistant connections are required.

Advantages

These insulated ferrules combine a copper crimping sleeve with a polypropylene plastic collar to ensure good electrical contact and mechanical protection for the stripped conductor end. The uniform dimensions and material quality support repeatable crimp performance and reduce the risk of wire strand fraying during insertion into terminals. Supplied in a bulk pack of 500, they are suited to repetitive wiring tasks and maintenance operations.

Suitable for

• Crimping onto 0.75 mm² stranded copper conductors
• Termination in control cabinets and distribution blocks
• Use with screw, spring or cage clamp terminals where insulated ferrules are recommended
• Electrical panel assembly and routine wiring maintenance

When it may not be suitable

These ferrules are specifically designed for 0.75 mm² conductors; they are not suitable for larger or smaller cross-sections where the fit would be loose or too tight. They are intended for standard crimping tools and dies—specialized tooling or non-compatible crimp profiles may yield poor crimps.

Key specifications

• Conductor material: copper crimp sleeve
• Insulation material: polypropylene (PP) plastic collar
• Nominal conductor size: 0.75 mm²
• Ferrule length: 8 mm
• Pack quantity: 500 pieces
• Colour coding: plastic collar for identification

How to use

Strip the stranded conductor to the appropriate length so the bare wire fully enters the copper sleeve without exposing insulation beyond the ferrule. Insert the stripped conductor into the ferrule until the wire end is flush with the sleeve. Use a properly sized crimping tool or die specified for 0.75 mm² insulated ferrules and apply a full, even crimp to compress the copper sleeve onto the conductor. After crimping, verify that the insulation collar sits against the terminal and that the crimped connection is mechanically secure before inserting into the terminal block or connector.

What to consider before purchase

• Confirm conductor cross-section is 0.75 mm² to ensure correct fit
• Check that available crimping tool and die are compatible with insulated ferrules for this size
• Ensure 8 mm ferrule length suits the terminal depth and strip length used in your application
• Consider pack quantity (500 pieces) relative to project scale and storage

Usage recommendations

Use a calibrated crimping tool matched to 0.75 mm² insulated ferrules and perform a pull test on sample crimps during installation. Store the pack in a dry, dust-free environment to maintain insulation and avoid contamination of the copper sleeve before use.