Rated current and breaking capacity
The Siemens 3VA1340-6EF32-0DB0 is a 3-pole molded case circuit breaker from the SENTRON series, rated 400 A continuously at 40 °C ambient. The thermal-magnetic TM240 release handles overload and short-circuit protection without external electronics. Breaking capacity reaches 220 kA at 240 V AC, 154 kA at 415 V and 440 V, 121 kA at 500 V, and 17 kA at 690 V — figures that cover most industrial distribution panels and motor control centers.
Integrated undervoltage release and auxiliary switches
Factory-fitted with an undervoltage release (UVR) and two HP auxiliary switches. The UVR trips the breaker when control voltage drops below a set threshold — standard for emergency-stop circuits and safety disconnects. The auxiliary switches provide status feedback (open/closed) to a PLC or indication lamp without additional wiring.
Physical fit and environmental limits
Dimensions: 248 mm high, 138 mm wide, 110 mm deep — fits standard SENTRON 3VA panel cutouts and busbar systems. Operating temperature range -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss 92.1 W at rated load, which drives enclosure ventilation requirements.