Terminal ferrule Rittal AS 4050.773 — copper/polypropylene, length 8 mm, ø 2.8 mm, white

Rittal AS 4050.773 is a crimp terminal ferrule designed for secure wire-end termination. The part combines a copper conductor tube with a white polypropylene (PP) insulated collar, providing reliable electrical contact and mechanical protection for stranded conductors. Its compact dimensions — an 8 mm tube length and a 2.8 mm outer diameter — make it suitable for tight terminal blocks and dense wiring arrangements commonly found in control cabinets, switchgear and industrial installations.

Advantages

The copper tube enables low-resistance, corrosion-resistant contact suitable for repeated insertion into screw and spring-type terminals. The polypropylene collar simplifies handling during crimping and offers color-coded identification while preventing stray strands from splaying. The small form factor supports neat wiring and consistent crimp quality when used with the appropriate ferrule crimping tool.

Suitable for

• Terminating stranded wires for screw and spring-clamp terminals
• Wiring inside control cabinets and electrical panels
• Industrial and machine wiring where compact ferrules are required
• Applications that require color-coded, insulated ferrules for identification

When it may not be suitable

This ferrule is intended for terminating stranded conductors and may not be appropriate for solid wire types or conductors that exceed the ferrule’s dimensional limits. It is a passive crimp accessory and does not provide insulation rated for high-voltage isolation by itself; additional insulation measures may be required depending on application standards.

Key specifications

• Conductor tube material: copper
• Insulation material: polypropylene (PP), white
• Tube length: 8 mm
• Outer diameter: 2.8 mm

How to use

Strip the stranded conductor to the appropriate length, insert the conductor into the copper tube until the insulation meets the polypropylene collar, and crimp the ferrule using a suitable insulated ferrule crimping tool sized for the ferrule diameter. Verify the crimped connection for secure mechanical retention and good electrical contact before inserting into the terminal. Follow relevant installation standards and torque specifications for the terminal block used.

What to consider before purchase

• Confirm compatibility with the conductor cross-section and strand count used in your wiring
• Ensure the 8 mm tube length and 2.8 mm outer diameter fit the target terminal or connector
• Choose the correct crimping tool and die set for insulated ferrules of this size
• Verify whether color-coded insulation meets your identification or standardization requirements

Usage recommendations

Use the Rittal AS 4050.773 with a matched ferrule crimping tool and check crimps regularly in environments subject to vibration; combine with appropriate terminal covers or additional insulation where required by safety standards.