Lovato CN2011220 Modular Contactor 20 A, 220 V AC/DC Coil

Lovato CN2011220 modular contactor, 20 A, 220 V AC/DC coil

The Lovato CN2011220 is a one-module DIN-rail contactor rated 20 A for resistive loads and 9 A for AC-3 motor duty, with a coil that accepts 220 V AC or DC. It is intended for lighting, heating and small-load switching in distribution boards. Seven Star LLC supplies the CN2011220 in Oman and the GCC as an independent supplier in Muscat.

The code CN is the modular contactor family, 20 the thermal rating in amperes, 11 the contact arrangement and 220 the coil voltage. The data sheet lists two poles and a one NO plus one NC auxiliary count, so the arrangement should be confirmed on the label for each application. Sibling parts such as the CN2020220 and the CNM2020220 use other contact arrangements or control features.

CN2011220 technical specifications

How a modular contactor differs from a power contactor

Standard power contactors are built for motor duty and have a short operating time, strong arc chambers and a large frame. A modular contactor takes a single DIN module and is optimised for quiet operation and low coil consumption in building installations. Its coil draws only 2.5 W at all times, so many units can be fed from a small supply, and the long mechanical life of 3 million operations suits frequent switching of lighting circuits.

The coil operates on either AC or DC at 220 V, which gives flexibility: a supply from the mains or from a 220 V DC source behaves the same. The closing time of up to 45 ms and the opening time of up to 50 ms are slower than a power contactor, which is acceptable for lighting and heating but unsuitable for fast cycles.

CN2011220 in distribution boards

Place the contactor beside circuit breakers on the same rail. A typical chain is a miniature circuit breaker, the CN2011220 as a load switch, and a timer, a photocell or a PLC output that controls the coil. It can also form the output stage for load-shedding schemes, with several contactors dropped in sequence when a generator is carrying the board.

CN2011220 selection checklist

• Load current of 20 A or less for resistive loads, 9 A for motor duty
• Coil voltage of 220 V AC or DC
• Contact arrangement of one NO and one NC as listed
• Lighting inrush: capacitive or LED loads can exceed the rating
• Minimum load of 17 V and 50 mA for reliable contact
• Temperature inside the board up to 55 °C
• Conductor size, up to 10 mm² at the power terminals

Installing and maintaining the CN2011220

Snap the contactor onto a 35 mm rail, tighten the power terminals to no more than 1.2 Nm and the coil terminals to 0.6 Nm using a PZ2 driver. Leave a small gap beside heavily loaded modules, since each pole dissipates about 1.7 W at 20 A.

Hum from the coil, flickering lights or hot terminals are signs of low control voltage or loose wiring. Because the life is rated against operations, a counter in the control system helps to schedule replacement before contact wear causes trouble.

Typical CN2011220 applications in Oman and the GCC

In the region, modular contactors control street and facade lighting, car park lighting, water heaters, electric trace heating and ventilation stages in buildings. High room temperatures reduce the margin on the 55 °C limit, so boards in plant rooms should be ventilated and loaded below the full 20 A.

Modular contactors in this family

Lighting loads deserve extra thought. LED drivers and electronic ballasts have a high inrush current for a very short time, and a number of them in parallel can exceed the contact capability of a 20 A modular contactor even when the steady current is small. Where large lighting groups are switched, split them over several contactors or choose one with a higher inrush capability. Heating loads are easier: resistive current is steady and within the listed AC-1 figure, provided the board does not run hotter than the temperature limits in the table. Label each contactor in the board, since several identical units usually sit next to each other.

Information to send with an RFQ for the CN2011220

• Part number CN2011220 and quantity
• Load type and current
• Coil voltage
• Contact arrangement
• Panel temperature
• Delivery location

Site conditions in Oman for the CN2011220

Low-voltage switching and protection devices in Oman often sit in motor control centres and outdoor panels where internal temperatures are high for much of the year. When you select the CN2011220, check its rated values at your real ambient temperature, as stated in the manufacturer documentation, and confirm the coordination with upstream protection and with the motor or load it serves. Short-circuit levels differ from site to site, so verify the breaking capacity required at the point of installation.

Standardising ratings and coil voltages across a project reduces the number of spare part numbers that need to be stocked. Keeping a small stock of the CN2011220 and recording settings such as trip ranges or ramp times shortens repair work during a breakdown.

Documents and quotation

Send the part number CN2011220 and we will confirm the documents available for it, such as the technical data sheet, wiring diagram and instruction sheet, together with availability and lead time.

Seven Star LLC is an independent supplier in Muscat and is not an official channel of the manufacturer. Share the quantity, delivery location and project reference with the request and we will answer with a formal quotation.