Rittal AS 4051.579 insulated ferrules 0.75 mm² x 12 mm, copper conductor, white polypropylene sleeve, 500 pcs

Rittal AS 4051.579 insulated ferrules are designed for reliable termination of 0.75 mm² single or stranded copper conductors. Each ferrule features a copper conductor barrel combined with a white polypropylene (PP) insulated sleeve measuring 12 mm in length. Supplied in a pack of 500 pieces, these ferrules are intended to improve electrical contact, prevent strand fraying and simplify crimped connections in switchgear, control panels and general wiring applications.

Advantages

These insulated ferrules provide consistent crimp quality thanks to the copper conductor barrel and a uniform sleeve length that supports secure insertion into terminals. The white PP sleeve offers mechanical protection and insulation at the conductor end while aiding identification and neat wiring. The product format—500 pieces per pack—supports larger wiring jobs and reduces the need for frequent reordering.

Suitable for

• Terminating 0.75 mm² copper stranded or solid conductors
• Crimped connections in switchgear and control panels
• General building wiring and electrical installations
• Applications requiring protection against strand fraying and improved contact reliability

When it may not be suitable

These ferrules are specified for 0.75 mm² conductor cross-section and a 12 mm sleeve length; they are not suitable for conductors with larger or smaller cross-sections. They are intended for copper conductors and should not be used with aluminum wiring unless specifically approved for such use by the installer or standards in the region.

Key specifications

• Conductor material: copper
• Insulation sleeve material: polypropylene (PP), white
• Rated conductor cross-section: 0.75 mm²
• Sleeve length: 12 mm
• Pack quantity: 500 pieces
• With plastic collar for improved insertion and crimp stability

How to use

Strip the conductor to the appropriate length so that the bare conductor fits fully into the copper barrel. Insert the conductor strands into the ferrule until the insulation butts against the sleeve. Use a suitable crimping tool matched to 0.75 mm² ferrules and apply a single, firm crimp according to the tool manufacturer's instructions. After crimping, visually inspect the termination for full insertion and a secure crimp; the sleeve should remain intact and protect the conductor end.

What to consider before purchase

• Verify conductor cross-section compatibility (0.75 mm²) with your wiring.
• Ensure the ferrule sleeve length (12 mm) suits the terminal depth and insulation requirements.
• Confirm suitability for copper conductors in your application and local regulations.
• Choose an appropriate crimping tool designed for insulated ferrules of this size.

Usage recommendations

For consistent results, use a calibrated crimping tool sized for 0.75 mm² insulated ferrules and follow local electrical installation standards. Store the ferrules in a dry environment and keep the pack sealed until use to avoid contamination of the sleeves. Replace any ferrules showing damage or deformation prior to installation.