The Siemens SENTRON 3VA1110-1AA42-0BH0 is a 4-pole switch disconnector in MCCB design, rated for 100 A continuous current (Iu) on an IEC frame 160 platform. It carries no overload or short-circuit protection — this is a pure isolating and switching device, not a circuit breaker. The built-in undervoltage release (UVR) at 24 V DC drops the contacts if control voltage is lost, making it suited for emergency-stop or safety isolation circuits where a loss of control power must mechanically open the load.
What the ratings mean for fit
The 100 A continuous rating at 800 V insulation voltage (Ui) and 690 V AC / 600 V DC operational voltage (Ue) means this switch disconnector handles full-load motor branch circuits up to that current class. The 2 kA limited short-time withstand (1 s and 0.5 s) tells you it's designed to ride through downstream faults without welding contacts — but it must be backed by an upstream protective device that clears faults above that level. The 4-pole configuration with busbar connection on front terminals suits it for main incoming or distribution panels where a neutral pole is switched alongside the three phases.
Deployment context
Mounts in a standard panel enclosure — dimensions 130 mm high, 101.6 mm wide, 70 mm deep. The front terminal arrangement for busbar connection means it's designed for horizontal or vertical busbar systems in distribution boards, not for cable entry from the rear. The IP40 front protection is suitable for indoor panel installation where no washdown or dust ingress is expected. Operating temperature range -25 °C to 70 °C covers most industrial environments; storage range -40 °C to 80 °C handles shipping and warehouse conditions.