Rittal AS 4051.581 insulated ferrules, copper/PP, 1.0 mm² x 10 mm, yellow, pack of 500

Rittal AS 4051.581 insulated ferrules are copper crimp end sleeves with polypropylene (PP) insulation in yellow, designed for 1.0 mm² conductors and a 10 mm insertion length. Supplied in a pack of 500, these ferrules are intended to create secure, low-resistance terminations for stranded wires used in control cabinets, terminal blocks and wiring assemblies. The plastic collar provides consistent insulation and guides the conductor during crimping to ensure reliable contact.

Advantages

These ferrules combine a tin-plated copper tube for good electrical conductivity with a polypropylene insulation collar that resists deformation during crimping. The consistent tube length and diameter support repeatable crimp quality, reducing the risk of stray strands and improving connection reliability. Supplied in a bulk pack of 500, they are convenient for repetitive wiring tasks and help maintain inventory continuity on job sites and in workshops.

Suitable for

• Stranded copper conductors with a nominal cross-section of 1.0 mm²
• Terminations in control cabinets and distribution panels
• Connection to screw-type terminal blocks and relays
• Panel wiring, junction boxes and electrical assemblies requiring insulated crimp ends

When it may not be suitable

These ferrules are sized specifically for 1.0 mm² conductors and a 10 mm insertion length; they are not suitable for larger or smaller conductor cross-sections or for applications that require longer insulation collars. For high-temperature environments or where specific flame-retardant materials are mandated, choose a ferrule with insulation material certified for those conditions.

Key specifications

• Conductor cross-section: 1.0 mm²
• Insertion length (tube): 10 mm
• Material — conductor tube: copper (tin-plated)
• Insulation material: polypropylene (PP), yellow
• Collar type: plastic insulation collar
• Quantity per pack: 500 pieces

How to use

Strip the conductor to the recommended length so that the bare strands match the 10 mm insertion length. Insert the stripped end fully into the ferrule tube until the insulation collar meets the conductor insulation. Use an appropriate insulation ferrule crimping tool sized for 1.0 mm² ferrules to compress the tube uniformly; verify the crimp by a light pull test. Once crimped, insert the ferrule into the terminal and secure the screw or clamp as specified by the equipment manufacturer.

What to consider before purchase

• Verify conductor cross-section and stripping length match 1.0 mm² and 10 mm insertion length
• Confirm compatibility with your crimping tool and terminal dimensions
• Assess environmental requirements (temperature, chemical exposure, flame retardancy)
• Purchase quantity appropriate for project needs — pack of 500 for bulk use

Usage recommendations

For consistent, low-resistance connections use a calibrated ferrule crimping tool matched to 1.0 mm² ferrules and perform regular quality checks (pull tests and visual inspection). Store the ferrules in a dry environment to avoid corrosion and handle stranded conductors carefully to prevent stray strands before crimping.