Integrator's spec recap — 3VA1032-3ED36-0JH0
The Siemens 3VA1032-3ED36-0JH0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in 3-pole configuration, carrying a rated continuous current Iu of 32 A and a rated insulation voltage Ui of 800 V. The TM210 thermal-magnetic overcurrent release handles overload and short-circuit protection without electronic communication or phase-failure detection, keeping the trip curve predictable for standard feeder and branch-circuit duty. Interrupting capacity reaches 75.6 kA at 240 V and 52.5 kA at 415 V — sufficient for high-fault points in industrial distribution panels where the upstream transformer or generator can deliver those levels.
What the key ratings mean for fit
The 32 A rating holds flat from 40 °C through 50 °C, then derates to 30.72 A at 55 °C, 30.08 A at 60 °C, 29.44 A at 65 °C, and 28.8 A at 70 °C. If the panel ambient inside the enclosure runs above 50 °C, the continuous load must be backed off accordingly — a 28 A continuous load at 70 °C still leaves margin, but a 32 A load at 55 °C would nuisance-trip on a warm day. Interrupting capacity at 440 V drops to 32 kA and at 690 V to 7.5 kA. For a 480 V wye service (277/480 V) the 440 V figure governs; verify the available fault current at the point of installation does not exceed 32 kA. At 690 V the breaker is still usable but only for systems with low prospective fault current — typically a step-down transformer secondary or a small generator. The auxiliary contact block is factory-fitted as 2 auxiliary switches plus 1 trip alarm switch (HQ version). The integrated shunt trip (STL) release is specified as 3VA9688-0BL32 — order that separately if remote tripping is needed. No undervoltage release is present, so the breaker holds closed on loss of control power unless the shunt trip is wired to a supervision relay.
Deployment context — panel and enclosure
The 3VA1032-3ED36-0JH0 measures 76.2 mm wide, 130 mm high, and 70 mm deep, fitting the standard 3-pole MCCB footprint on a DIN rail or direct panel mount. Front IP40 protection means the breaker is suitable for indoor switchgear and control panels where tools or fingers cannot reach live parts through the front cover; it is not rated for washdown or outdoor exposure without an additional enclosure. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C — adequate for unheated electrical rooms and most industrial environments. The latching endurance of 15 000 cycles covers frequent switching in process lines but not continuous-duty motor starting; for motor circuits, pair this MCCB with a contactor rated for the load.