Klauke 25R Copper Crimp Butt Connector for 35 mm² Conductors, Uninsulated, 25 mm Length

Electricians and panel builders rely on the Klauke 25R when they need a secure, permanent joint between two 35 mm² copper conductors. This tubular crimp butt connector is made from untreated copper, offering excellent conductivity and a gas-tight crimp that resists vibration and corrosion. With a length of 25 mm and an inner diameter of approximately 8.5 mm, it accommodates both stranded and solid copper wires, making it a versatile choice for industrial wiring, switchgear assembly, and power distribution.

Key specifications

• Material: Copper (Cu), untreated surface
• Conductor cross-section: 35 mm²
• Connector type: Crimp butt connector, tubular design
• Length: 25 mm
• Inner diameter: approx. 8.5 mm
• Outer diameter: approx. 11.5 mm
• Wall thickness: approx. 1.5 mm
• Insulation: Uninsulated
• Connection method: Crimp
• Number of cable entries: 2
• Operating temperature: -40°C to +120°C

Why choose it

The Klauke 25R delivers a reliable, low-resistance connection that maintains integrity under mechanical stress and temperature fluctuations. Its uninsulated design allows for inspection and is ideal for applications where heat-shrink tubing or tape will be applied for insulation. The pure copper construction ensures maximum conductivity and long-term performance in demanding environments.

Ideal use cases

• Joining 35 mm² copper conductors in industrial control panels
• Extending or repairing cable runs in power distribution systems
• Creating permanent splices in motor wiring and switchgear
• Applications requiring a compact, high-current connection

Good to know

The connector is supplied uninsulated; apply suitable insulation such as heat-shrink tubing after crimping. Use a proper crimping tool designed for 35 mm² copper butt connectors to achieve a gas-tight joint. The connector meets the requirements for copper conductors according to DIN 46267.