What it is and what it does
The Siemens 3VM1050-2ED32-0AA0 is a SENTRON 3VM1 series 3-pole molded case circuit breaker (MCCB) designed for line protection — the primary role of this class is to protect cables and distribution buswork from overloads and short circuits in a panel. It carries a TM210 thermal-magnetic trip unit, meaning the thermal element handles overload protection and the magnetic element handles short-circuit interruption — no electronic adjustments, no communication module, no ground-fault monitoring built in.
Rated current and thermal derating — the real-world ampacity
Rated 50 A continuous at 40 °C ambient, and it holds that same 50 A rating at 45 °C and 50 °C — no derating needed until you cross 55 °C, where it steps down to 49 A, then 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. That thermal curve matters when you're packing this into a panel with other heat sources: at 70 °C ambient you lose 5 A off the nameplate, so the load calculation for the branch circuit needs to account for the actual enclosure temperature, not the 40 °C reference point.
Breaking capacity — what it can interrupt at your system voltage
Short-circuit breaking capacity varies sharply with system voltage: 53 kA at 240 V AC, 32 kA at 415 V AC, 14 kA at 440 V AC, and 8 kA at 500 V AC. At 415 V — the most common three-phase distribution voltage in many markets — the 32 kA rating covers most industrial service-entrance and sub-distribution applications, but if your available fault current at the panel exceeds that, you'd need a current-limiting upstream device or a higher-rated frame.
Physical fit and panel integration
Dimensions are 76.2 mm wide (3 inches), 130 mm tall (5.12 inches), and 70 mm deep (2.76 inches) — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without surprises. Front face carries an IP40 protection class — protected against tools and wires over 1 mm, but not sealed against water ingress, so it belongs inside a rated enclosure, not exposed to washdown.
Lifecycle and sourcing posture
Lifecycle status is current production.