100A contactor

Begin with the motor’s load current and the control circuit voltage. For example, an 80 A unit in this range handles motors up to about 37 kW, while a 95 A variant suits up to roughly 45 kW. All units are 3-pole with a 220/230 V AC control coil and offer 1 normally open plus 1 normally closed auxiliary contact. Mounting supports include DIN rail or panel mounting, and insulation voltage is rated at 690 V. Match the current, voltage, and control logic to your installation to ensure reliable switching and protection.

AC-3 covers non-reversing motor starting and switching of motors under normal to heavy load, while AC-4 includes switching with motor braking and higher inrush during starting. In practical terms, choose AC-3 for standard starting of a motor without braking and AC-4 when you need braking or frequent, rugged switching. On this line, the AC-3 current rating is higher at 380/400 V (80 A) than the AC-4 rating (37 A at 380/400 V), reflecting the different load and protection profiles you require for safe operation.

Yes, pairing with a matched thermal overload relay is essential for motor protection and longevity. The recommendation is to size the overload to the motor’s full load current, ensuring it trips if the motor overheats. This practice helps prevent insulation damage and contact wear during overload conditions. Proper pairing, along with correct coil voltage and mounting, keeps your control panel running smoothly and reduces the risk of unexpected motor downtime.

Coil voltages available in this line include 220/230 V AC, with options suitable for standard control circuits. A higher or lower coil voltage requires appropriate wiring and protection in the control circuit, ensuring compatibility with the control hardware and safety standards. Verify that the control supply matches the coil rating, and route control wiring separately from power lines to minimize interference and maintain reliable operation of the auxiliary contact and main contacts.

Choose based on your control panel design and space. These contactors support both DIN rail and panel mounting, offering flexible integration into existing cabinets or MCCs. If you have a compact control enclosure, DIN rail mounting simplifies installation and replacement. For larger or custom panels, panel mounting can provide neater wiring and easier service access. Ensure the chosen mounting method aligns with the panel’s space constraints and accessibility requirements for maintenance.

For a motor around 22 kW, a 50 A model is appropriate, with 380/400 V operation and the ability to handle AC-3 loads. If you’re working with up to 37 kW, the 80 A unit is ideal, and for about 45 kW the 95 A option fits. Always check the Ie ratings at your operating voltage: 80 A at 380/400 V (AC-3) and 49 A at 660/690 V (AC-3), or 37 A at 380/400 V (AC-4) to confirm compatibility with your motor and service conditions.