Rittal AS 4051.604 insulated ferrules 1.5 mm² (AWG 16) copper, 10 mm, pack of 5000, red

Rittal AS 4051.604 insulated ferrules are designed for terminating flexible and stranded conductors with a cross-section of 1.5 mm² (AWG 16). Each ferrule features a copper sleeve for reliable electrical contact and a polypropylene (PP) insulated collar in red; the overall length is 10 mm and the inner sleeve diameter is 3.5 mm. Supplied in a bulk pack of 5000 pieces, these insulated ferrules are intended for professional electrical installations where consistent crimp quality and clear conductor identification are required.

Advantages

The copper sleeve ensures low contact resistance and good conductivity while the PP insulated collar provides mechanical protection and colour-coded identification. The 10 mm length supports a secure crimp onto 1.5 mm² (AWG 16) conductors, reducing the risk of stray strands and improving connection reliability in terminal blocks and screw connections. Supplied in a large pack, they are suitable for repetitive wiring tasks and help maintain consistent installation standards.

Suitable for

• Terminating stranded or flexible conductors sized 1.5 mm² (AWG 16)
• Control cabinets and distribution panels
• Industrial and machine wiring where colour coding is used
• Panel builders, electricians, and maintenance technicians performing bulk wiring

When it may not be suitable

These ferrules are specifically sized for 1.5 mm² (AWG 16) conductors; they will not provide an appropriate fit for significantly larger or smaller conductor cross-sections. They are intended for crimped terminations and are not a substitute for soldered joints or special-purpose terminals requiring different mechanical or environmental ratings.

Key specifications

• Conductor cross-section: 1.5 mm² (AWG 16)
• Sleeve material: copper
• Insulation material: polypropylene (PP), colour: red
• Length: 10 mm
• Inner sleeve diameter: 3.5 mm
• Pack quantity: 5000 pieces
• Includes plastic collar for mechanical protection and identification

How to use

Strip the conductor to the recommended length so that no bare strands extend beyond the ferrule when crimped. Insert the stripped conductor fully into the copper sleeve until the insulation collar meets the conductor insulation. Use a suitable insulated-ferrule crimping tool sized for 1.5 mm² ferrules to perform a single, firm crimp. After crimping, verify the mechanical retention and electrical continuity before installing the terminated conductor in the terminal block or screw clamp.

What to consider before purchase

• Confirm conductor cross-section matches 1.5 mm² (AWG 16)
• Ensure crimping tool compatibility with insulated ferrules for consistent crimps
• Assess whether the red colour coding meets your wiring identification scheme
• Consider pack size (5000 pcs) relative to project needs and storage

Usage recommendations

For reliable results, use a calibrated crimping tool appropriate for insulated ferrules and perform a pull test on a sample of crimps after installation. Store the bulk pack in a dry, dust-free environment to protect the insulated collars and maintain consistent crimp quality.