What this 3VA1050-2ED36-0HH0 is and what it does
The Siemens SENTRON 3VA1050-2ED36-0HH0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — the primary job is protecting cable and distribution bus against overload and short circuit, not motor or generator duty. Rated 50 A continuous at 40 °C ambient, it holds that same 50 A rating up through 50 °C, then derates to 49 A at 55 °C and 45 A at 70 °C — so in a warm panel you lose very little headroom until you cross 55 °C. Interrupting capacity is 52.5 kA at 240 V, dropping to 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 500 V and 690 V — that 7.5 kA floor at 690 V tells you this is a 240/415 V distribution breaker, not a 690 V motor-circuit device. Insulation voltage is rated 800 V, so the breaker itself can sit in a 690 V panel without creepage issues — the interrupting numbers, not the insulation, are what limit the application voltage.
Lifecycle and sourcing reality
It is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time, not from a shelf count.
What the auxiliary configuration means for panel integration
Factory-fitted with 2 auxiliary switches plus a trip alarm switch (HQ type), and a shunt trip release (STL) — so you get remote status indication and remote tripping without field-installing accessories. No undervoltage release fitted, no ground-fault monitoring module, no communication function — this is a plain line-protection MCCB with the basic remote-control options. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — standard 3-pole MCCB footprint for a 50 A frame, fits most distribution panelboards without a width surprise.
How it compares to the 100 A frame sibling
The closest functional sibling in the same SENTRON 3VA family is the 3VA1110-5ED36-0AC0, which is a 100 A frame on the same 3-pole platform — same 70 mm depth, same auxiliary switch options, but physically wider and heavier to handle the higher continuous current. If your BOM calls for 50 A line protection with shunt trip and alarm contacts, this 3VA1050-2ED36-0HH0 is the correct frame — the 100 A sibling would work electrically but overshoots the ampacity and takes more panel width.