Cable end ferrules Rittal AS 4050.769, copper with yellow polypropylene insulation, 8 mm length, 3 mm diameter, pack of 500

Rittal AS 4050.769 insulated cable end ferrules are designed for secure termination of stranded electrical conductors. Each ferrule features a copper conductor sleeve and a yellow polypropylene (PP) insulating collar. Measuring 8 mm in length with a 3 mm outer diameter, these ferrules come in a pack of 500 and are intended to improve contact in screw and spring-clamp terminals while preventing wire fraying during crimping.

Advantages

These cable end ferrules combine a conductive copper barrel with a durable yellow polypropylene insulation collar to provide reliable electrical contact and mechanical strain relief. The 8 mm length ensures sufficient sleeve coverage for typical stranded wires, and the consistent 3 mm diameter supports uniform crimp quality. Supplied in a bulk pack of 500, they are suited to repetitive installation tasks and reduce assembly time compared with hand-twisting alone.

Suitable for

• Termination of stranded wires in control panels and switchgear
• Electrical installations requiring secure screw or spring-clamp connections
• Industrial wiring, maintenance and series assembly work
• Applications where wire fraying must be prevented during crimping

When it may not be suitable

These ferrules are intended for use with stranded conductors sized to fit an 8 mm sleeve length and a 3 mm outer diameter; they may not be suitable for very fine or very large conductor cross-sections that fall outside that range. They are not intended for use as an insulation-only sleeve or for high-voltage insulation applications beyond the rating of the copper sleeve and polypropylene collar.

Key specifications

• Material of conductor: copper
• Insulation material: polypropylene (PP), yellow
• Ferrule length: 8 mm
• Outer diameter: 3 mm
• Pack quantity: 500 pieces

How to use

Strip the conductor to the appropriate length so the bare strands fully enter the copper sleeve without overlapping the insulation collar. Insert the stranded wire into the ferrule barrel until the insulation collar meets the conductor insulation. Use a suitable crimping tool rated for insulated ferrules to apply a single, full-length crimp on the copper barrel, ensuring consistent compression and a secure mechanical and electrical connection. After crimping, verify the termination by a light pull test and visual inspection for strand containment.

What to consider before purchase

• Check conductor cross-section and insulation diameter to ensure compatibility with an 8 mm sleeve length and 3 mm outer diameter
• Confirm that polypropylene insulation and copper barrel materials are appropriate for the installation environment (temperature, chemical exposure)
• Ensure you have a crimping tool suitable for insulated ferrules to achieve reliable terminations

Usage recommendations

For consistent results, pair these ferrules with a calibrated crimping tool specified for insulated cable end ferrules and perform periodic quality checks during batch assembly. Store packs in a dry environment to protect the polypropylene collars and maintain crimping performance.