The interrupting capacity reaches 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V, giving it headroom for high-fault industrial feeders. The basic switch core is order code 3VA21635MN320AA0.
Fits standard MCCB mounting cutouts in motor control centers and distribution boards. The undervoltage release (UVR) is factory-installed; no field retrofit required for undervoltage protection.
Motor protection and selectivity
Rated for motor protection duty — the design includes phase failure detection and a trip indicator. The 63 A frame supports typical motor loads up to about 30 kW (400 V) depending on starting characteristics and coordination with upstream devices. The short-time withstand and selectivity data (minimum trip time 4 s, maximum 17 s) allow coordination with downstream contactors and overload relays.
