Eaton Contactor, 24 V dc Coil, 4 A, 2NO + 2NC, 400 V ac

Keep your options open with this DC operating contactor from Eaton. It features a 2NO/2NC configuration that allows you to customise endpoints, such as push buttons, to suit your setup. This unit can perform up to 9000 operations per hour and has a long life of 20 million switching cycles, making it a heavy-hitter for use with industrial applications. The product's corrosion-resistant housing makes it a good fit for use in factories, transportation systems and manufacturing facilities.

• Cage clamp termination grips onto solid or stranded wires in a jiffy to simplify installation
• DIN-rail mounting makes quick work of attaching this component to your setup

Contactors are heavy-duty switches that use a coil to generate an electromagnetic field to connect or cut a circuit. This turns systems off and on as needed.

NC stands for normally closed, which means the circuits are connected, and your device is usually on, which is a good fit for systems like humidifiers. Normally open means devices are off until you turn them on, like with lighting systems.

Eaton formerly known as Moeller