What the ratings mean for the panel
The Siemens 3VA1063-3ED36-0JH0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection — meaning it sits at the feeder or main distribution point, not on a motor circuit. The 63 A rated continuous current (Iu) holds solidly from 40 °C up to 50 °C without derating; above that it drops to 60.48 A at 55 °C and 56.7 A at 70 °C, so if the panel runs hot the breaker needs to be upsized or the load trimmed. The TM210 thermal-magnetic release gives a fixed thermal curve and magnetic trip — no interchangeable trip units, so what you see on the nameplate is what you get. Breaking capacity is where this part earns its keep: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. At 415 V — the common European three-phase distribution voltage — that 52.5 kA rating means it can safely interrupt a fault current up to that level without the arc flashing over or the case rupturing. That is a high-interrupting rating for a 63 A frame; it is sized for installations with large upstream transformers or parallel-feed configurations where the available fault current is substantial. Rated insulation voltage is 800 V, so the breaker is rated for the voltage stress across open contacts in 690 V systems. The front face carries IP40 protection — fine for a dry indoor panel, but not for washdown or outdoor exposure.
Auxiliaries and releases
This variant ships with a shunt trip (STL) for remote tripping — pull the signal and the breaker opens regardless of load current. It also carries 2 auxiliary switches plus 1 trip alarm switch (HQ configuration), so the panel PLC or DCS gets a positive status signal for open/closed and a separate alarm contact that changes state only on a fault trip. The integrated auxiliary trip accessory is listed as order code 3VA9688-0BL32. No undervoltage release, no communication module, no phase-failure detection, no ground-fault monitoring — this is a line protection breaker with remote trip and status feedback. If the application needs undervoltage protection or ground-fault alarm, look at the 3VA1 series with the appropriate release modules.
Physical fit and panel integration
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint for this frame size — it occupies three 25.4 mm module positions on a DIN rail or a bolted panel-mount plate. Depth of 70 mm means it clears most 200 mm deep enclosures with room for wiring gutters. Latching endurance is rated at 15,000 operations — that is mechanical life, not electrical. For a main breaker that cycles once or twice a day, that is effectively a lifetime rating. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The storage range is the handling limit — the breaker can sit in a cold warehouse or a hot truck without damage.