Contactor (power) Eti-Polam CEM18.10 3-pole 18A coil 24V AC 50/60Hz 1 NO 0 NC

Contactor (power) Eti-Polam CEM18.10 is a three-pole switching device rated for 18 A with a 24 V AC coil operating at 50/60 Hz. The unit provides one normally open contact (1 NO) and zero normally closed contacts (0 NC), intended for switching AC loads in control panels and automation circuits. Its compact design fits standard DIN-rail mounting and integrates into motor starters, heater control loops and other equipment where reliable AC switching is required.

Advantages

The Eti-Polam CEM18.10 offers straightforward electrical switching with a clear contact configuration of one normally open pole, simplifying wiring for single-contact control schemes. The 24 V AC coil operating at both 50 Hz and 60 Hz makes the device compatible with common control voltages in industrial and building automation. Designed for DIN-rail installation, the contactor occupies minimal panel space while providing a rated switching current of 18 A for a range of small motors and resistive loads.

Suitable for (tasks / use cases)

• Switching small AC motors and pumps up to 18 A
• Controlling electric heaters and resistive loads in panels
• Integration into automation control circuits and relay logic
• Use in motor starter assemblies and contactor blocks
• DIN-rail installations in electrical distribution cabinets

When it may not be suitable

This contactor is not intended for switching currents above its 18 A rating or for applications requiring multiple normally closed contacts. For heavy-duty motors, large compressor drives or equipment with higher inrush currents, a contactor with a higher current rating and appropriate motor-protection devices should be selected. It is also not suitable where a DC coil voltage or different control voltage is required.

Key specifications

• Poles: 3
• Rated operational current: 18 A
• Coil voltage: 24 V AC
• Coil frequency: 50/60 Hz
• Contact configuration: 1 normally open (1 NO), 0 normally closed (0 NC)
• Mounting: DIN-rail compatible
• Intended load type: AC motors and resistive loads

How to use

Mount the contactor on a suitable DIN-rail inside an electrical panel and wire the line supply to the three main poles according to the circuit diagram. Connect the 24 V AC control supply to the coil terminals, ensuring correct polarity is observed for AC connections per installation practice. Use appropriate terminal tightening torque and follow local electrical codes. Incorporate overload protection, fuses or circuit breakers sized for the connected load and verify the contactor operation by energizing the coil and checking that the NO contact closes under control commands.

What to consider before purchase

• Ensure the 18 A rating is sufficient for the motor or load including start-up currents
• Confirm the control voltage is 24 V AC and compatible with your control system
• Check available panel space and DIN-rail mounting compatibility
• Plan for appropriate overload protection and coordination with other protective devices

Usage recommendations

Use the Eti-Polam CEM18.10 in applications with steady AC loads within its rated current and integrate suitable overload and short-circuit protection. Regularly inspect contact terminals for tightness and signs of wear when used in frequent switching cycles.