It's rated for motor switching at 30 kW in AC-2 and AC-3 duty at 400 V, and handles 55 A in AC-4 duty at 400 V — the heavy jogging and inching category that wears contacts fastest.
This is a fast-moving SIRIUS size that MRO storerooms typically keep as a critical spare for 400 V motor circuits up to 30 kW.
Ratings & Fit
The AC-3 rating at 400 V is 30 kW — that's the standard duty for squirrel-cage motors starting and running. Coil circuit operates at 48 V rated value, with a pickup voltage of 0.8 x rated (38.4 V) and a dropout of 1.1 x rated (52.8 V) — standard for control transformers in 48 VDC panels. Terminal capacity: solid conductors accept 2x (0.25 to 2.5 mm²), stranded accept 2x (10 to 50 mm²) for the main circuit, and 2x (2.5 to 16 mm²) for auxiliary circuits. The 201 mm depth, 70 mm width, and 146 mm height fit the S3 frame footprint — verify panel layout if replacing a different manufacturer's size.