PCB connection terminals

The wire protection principle is a user-related, cost-effective alternative to the clamping yoke principle. The wire guard prevents the wire from shearing off and being pushed away.

With the clamping yoke principle, the wire is pressed indirectly against the busbar (solder tag) via the screw and the clamping yoke. This creates the required contact force via the easy-to-use screw connection. This system creates a gas-tight, vibration-proof connection between the wire and the conductor rail.

The push-in principle allows solid conductors or fine-stranded cores with ferrules to be inserted directly into the terminal point without the need for tools. The push-in spring contacts the core against the busbar. When connecting fine-stranded conductors without ferrules or to release the connections, the blade push lever must be actuated.

With the eccentric top principle, the wire is guided into the terminal point parallel to the screwdriver in the direction of view. For certain installation conditions, e.g. with small lateral distances in installation frames, this system offers the operator very good accessibility to the connection level. This connection system is generally equipped with two solder lugs.

The tension spring principle works in a similar way to the tried-and-tested tension clamp principle. The tension clamp also maintains the separation between the mechanical and electrical functions. The tension spring made of high-quality, rust- and acid-resistant steel pulls the wire against the galvanised copper busbar. Low contact resistance and high corrosion resistance are achieved by the tin surface of the conductor rail. This is maintained in the long term thanks to the equalising effect.