Overview Reviews Product Description ABB S-203-U-K40A Breaker 40A 240V 4P 10kA 50/60 Hz. Product Videos Custom Field Amp 40 Volts 240 Poles 4 kA 10 Product Reviews Write a Review Write a Review × ABB ABB S-203-U-K40A Breaker 40A 240V 4P 10kA 50/60 Hz Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *