Which contactor is better to choose for a single-phase load of 3 kW?

Magdy asks:

Hello, the question of powering 9 devices is 220V for 3 kW, for this I think to take 9 contactors for 25A.

What is the difference between these models:

Schneider Electric CONTACTOR TVS 1NO 25A 400V AC3 220V 50HZ;
ABB Contactor ESB25-40N-06 modular (25A AC-1, 4NO);
Legrand Contactor 230V 2NO 25A CX3.

Prices differ by more than 2 times.

The answer to the question:

Hello! First of all, the difference in performance. All three of these brands are, in principle, not in the very budget segment of the market. Especially ABB and Schneider. They also have different application categories (for Schneider AC-3, for ABB - AC-1, and for Legrand it is not clear).

AC-1 is a load like heaters, incandescent lamps, without inductance and without inrush currents.

AC-3 is a load with significant short-term overloads, such as direct start-up of electric motors with a short-circuit rotor, engine shutdown (possibly with repeated starts or countercurrent braking) and so on.

If it is simpler, then the AC-3 withstands more rigid switching.

The first (Schneider) is an ordinary contactor in an open design. The one from ABB is already a modular DIN rail contactor, I believe that it will turn on even more quietly and not so much buzz (although I'm not sure about that). If the first two had 3 poles and 1 block contact, then the third, Legrand, two poles, count the number of terminals yourself - there you can see in the photo that the coil contacts are below, there are 2 more contacts and 2 above them. Total 2 groups of normally open contacts.

p.s. Yes, and ABB itself is expensive (although usually on a level with a Schneider).

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