Klauke KLAU Copper Butt Crimp Connector 4.0 mm² 20R-100 (Pack of 20)

For reliable conductor splicing in electrical installations, the Klauke KLAU Copper Butt Crimp Connector 4.0 mm² 20R-100 stands out with its seamless tubular design made from high-purity electrolytic copper. Unlike generic connectors that may use alloys or thinner walls, this connector offers consistent wall thickness and a smooth inner surface, ensuring a secure, low-resistance crimp every time. The pack includes 20 pieces, making it a practical choice for both one-off repairs and small production runs.

Highlights

• Material: Electrolytic copper (E-Cu) for excellent conductivity and corrosion resistance.
• Conductor cross-section: 4.0 mm², suitable for fine-stranded and solid conductors.
• Uninsulated tubular design for crimping; ideal for use with heat-shrink tubing or insulating tape.
• Dimensions: 16 mm length, 3.0 mm inner diameter, 4.5 mm outer diameter, 0.75 mm wall thickness.
• Wide temperature range: -40°C to +125°C, voltage rating up to 1000 V AC/DC.
• RoHS compliant, lead-free and environmentally friendly.

In daily use

These butt connectors are engineered for quick and secure splices in junction boxes, control cabinets, and automotive wiring. The bare copper surface accepts standard crimping tools, and the uniform wall thickness prevents cracking or deformation. After crimping, the joint can be insulated as needed. The 20-piece pack keeps your toolbox stocked without excess waste.

Full specifications

• Connector type: Butt crimp connector
• Series: Kerbverbinder
• Material: Electrolytic copper (E-Cu)
• Conductor cross-section: 4.0 mm²
• Insulation: Uninsulated
• Surface treatment: Bare copper
• Connection method: Crimp
• Shape: Tubular
• Quantity per pack: 20 pieces
• Overall length (L): 16 mm
• Inner diameter (d1): 3.0 mm
• Outer diameter (d2): 4.5 mm
• Wall thickness: 0.75 mm
• Suitable conductor types: Fine-stranded and solid conductors
• Temperature range: -40°C to +125°C
• Max. voltage rating: 1000 V (AC/DC)
• Application: Electrical conductor splicing and joining
• RoHS compliant: Yes

Final note

A dependable crimp connector that combines high-purity copper construction with precise dimensions for consistent, low-resistance splices in professional electrical work.