The Siemens 3VA4110-1BB24-3AA0 is a 2-pole molded case switch from the 3VA4 UL frame 125 family, rated 100 A continuous with a maximum short-circuit current rating of 65 kA at 480 V. It is configured as an MCS110 — a disconnect switch without overload protection, relying on self-protection set at 16× In (Ii=16×In). This means the device clears faults up to 65 kA at 480 V without relying on an upstream breaker for series coordination, a key spec for panel builders needing a high-fault-rated disconnect in a compact UL 508A branch circuit.
Integration notes
Mounts in a standard panel enclosure on the UL 125 frame footprint. The 2-pole configuration suits single-phase or DC branch circuits where a high-interrupting disconnect is required. No overload relay is integrated — external motor protection (overload relay or electronic trip unit) must be added in series for motor branch circuits per NEC 430. The self-protection setting (Ii=16×In) provides magnetic-only instantaneous trip at 1600 A, intended for short-circuit protection only.