The Siemens SENTRON 3VA1112-5FD42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated at 62 A continuous, fitted with a TM210 thermal-magnetic trip unit. It's designed for line protection in distribution panels and motor control centers where you need a compact, high-interrupting MCCB. Breaking capacity is the headline here: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 690 V. That 187 kA figure at 240 V means this breaker can safely clear a fault on a high-capacity transformer secondary without the arc flashing over — critical for panel selectivity studies where the upstream transformer can dump serious current into a bolted fault. The TM210 release is a fixed thermal-magnetic type — no interchangeable trip units, no electronic adjustments. The thermal element handles overloads (inverse-time curve), the magnetic element handles short-circuits (instantaneous). For a 62 A feeder on a 480 V or 240 V distribution board, this is a straightforward, reliable choice that doesn't need programming.
Thermal derating and panel fit
At 40 °C ambient the breaker carries its full 125 A frame rating; at 70 °C it derates to 114 A. The 62 A trip unit is well within the frame's thermal margin, so even in a warm enclosure — say a non-ventilated panel near a process line — you won't hit nuisance tripping from ambient heat. Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep. That 70 mm depth is shallow enough for a standard 200 mm deep enclosure; the 101.6 mm width (4 inches) is a 4-pole footprint that fits common Siemens SENTRON mounting bases and busbar systems. Front IP40 protection means it's fine for a clean indoor panel but not for washdown areas. Power loss at rated current is 28.1 W maximum. In a multi-breaker panel, that heat adds up — account for it in the enclosure thermal budget, especially if you're packing several 4-pole breakers in a small cabinet.
Lifecycle and sourcing
The 800 V rated insulation voltage gives headroom for 690 V systems, and the -25 °C to +70 °C operating range covers most indoor industrial environments. Storage range of -40 °C to +80 °C means it can sit in an unheated warehouse without issue.