Integrator's terse spec recap
The Siemens 3VA1050-2ED36-0BH0 is a 3VA1 IEC frame 100 molded case circuit breaker (MCCB) with a 3-pole configuration, rated for line protection under the TM210 thermal-magnetic release curve. Breaking capacity class B delivers Icu=16kA @ 415V, which means it can safely interrupt fault currents up to that level on a 415 V three-phase system without upstream cascading — a key parameter for panel coordination studies. Overload protection is fixed at In=50A with Ir=50A; short-circuit protection is fixed at Ii=10 x In (500A magnetic trip). This is a non-adjustable thermal-magnetic design — the trip points are set at the factory, so the part is specified for a fixed 50A load rather than a range. Clamp-type terminals accept copper or aluminum conductors within the frame's terminal range. Integrated undervoltage release (UVR) at 24 V DC, plus two auxiliary switches (HQ) and one trip alarm switch (HQ). The UVR provides undervoltage protection per IEC 60947-1; if control voltage drops below the dropout threshold, the breaker trips. The auxiliary and alarm contacts report breaker status and trip condition back to the PLC or annunciator panel.
Lifecycle and sourcing reality
For BOM freeze or compliance documentation needs, Siemens provides the standard declaration of conformity (CE/UKCA), UL/CSA recognition where applicable, and RoHS/REACH material compliance statements. These documents are typically available via the Siemens Industry Online Support portal under the 3VA1 family documentation tree.
Integration and mounting
Mounts in a standard panel enclosure via the 3VA1 frame's screw-clamp base — no DIN-rail adapter for this frame size. The clamp terminals accept conductors per the terminal marking; verify torque values in the installation instructions. The UVR coil draws a continuous holding current at 24 V DC; ensure the control transformer or DC supply is sized for the sum of all UVR coils in the panel.