The Siemens 3VA1110-1AA42-0DA0 is a SENTRON 3VA1 switch disconnector in MCCB-style design, built on the IEC frame 160 platform. Main circuit connections are busbar-style front terminals.
At 70 mm deep, 101.6 mm wide, and 130 mm tall, this 4-pole switch disconnector occupies the same DIN-rail footprint as the 3VA1 MCCB family. The 101.6 mm width (4 inches) is the standard 4-pole width for the IEC frame 160 — it will fill four module spaces on a DIN rail. Verify gland plate clearance for the front busbar terminals; the depth leaves room behind a 200 mm deep enclosure door. Maximum power loss is 38 W at rated current.
Key selection detail: no overcurrent protection built in
This is a switch disconnector, not a molded case circuit breaker. It has no thermal-magnetic or electronic trip unit. The description explicitly states "without overload protection" and "without short-circuit protection." It is intended for isolation and switching duty where overcurrent protection is provided upstream or by a separate device. The UVR coil is the only integrated release — it drops the switch on undervoltage or remote trip via the control circuit.