Ferrule Rittal AS 4051.544 for 0.5 mm² conductors, 10 mm length, copper core with polypropylene insulation, pack of 4000

Rittal AS 4051.544 is a ferrule designed for terminating 0.5 mm² (AWG 20) conductors. The termination sleeve features a copper conductor core for reliable electrical contact and a polypropylene (PP) insulated plastic collar that guides the conductor and improves insertion into terminals. With a 10 mm length and approximately 2.9 mm outer diameter, this ferrule is supplied in a pack of 4000 pieces for bulk use in industrial and electrical installations.

Advantages

The copper core provides low electrical resistance and long-term conductivity while the polypropylene insulated collar offers strain relief and prevents fraying of fine-stranded wires. The 10 mm sleeve length gives a secure crimp area that supports firm mechanical and electrical connections. Supplied in large quantity, the pack reduces frequent reordering and supports high-volume wiring tasks.

Suitable for

• Crimping fine-stranded 0.5 mm² (AWG 20) conductors
• Termination into terminal blocks and screw terminals in control cabinets
• Panel wiring, distribution boards and switchgear assemblies
• Industrial and building electrical installations requiring standardized ferrules

When it may not be suitable

This ferrule is intended specifically for 0.5 mm² conductors; it should not be used on conductors of significantly different cross-sections, as improper sizing can result in poor crimps or unreliable electrical contact. For insulated housings or terminals that require a different outer diameter or a longer insulation collar, an alternative ferrule size or design may be more appropriate.

Key specifications

• Conductor cross-section: 0.5 mm² (AWG 20)
• Sleeve material: copper core
• Insulation material: polypropylene (PP) plastic collar
• Sleeve length: 10 mm
• Approximate outer diameter: 2.9 mm
• Pack quantity: 4000 pieces

How to use

Strip the conductor to the recommended length so that the bare wire fully enters the metal sleeve. Insert the conductor evenly into the ferrule until the insulation collar abuts the wire insulation. Use a suitably sized ferrule crimping tool to compress the metal sleeve uniformly, following the crimping tool manufacturer's instructions to achieve the correct compression profile. After crimping, inspect the connection for a secure mechanical hold and consistent electrical contact before installing into the terminal or panel.

What to consider before purchase

• Confirm conductor cross-section compatibility (0.5 mm² / AWG 20)
• Verify sleeve length and outer diameter suit your terminal or connector dimensions
• Ensure you have the appropriate crimping tool for insulated ferrules of this size
• Plan inventory needs—pack of 4000 may be intended for bulk wiring projects

Usage recommendations

Use a dedicated insulated-ferrule crimping die sized for 0.5 mm² ferrules and perform sample pulls to verify mechanical strength. Store ferrules in a dry environment and handle them with clean, undamaged crimping tooling to maintain consistent, safe electrical connections.