The Siemens 3VA2163-6HN32-0AH0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for line protection, carrying 63 A continuously at 40 °C ambient with no derating needed up to 50 °C — the same 63 A holds at 45 °C and 50 °C, then steps down to 60.6 A at 55 °C and 53.6 A at 70 °C. Breaking capacity hits 242 kA at 240 V AC, 187 kA at 415/440 V, and still delivers 121 kA at 500 V, making it a strong choice for high-fault panels where SCCR headroom matters. Three poles, ETU350 electronic trip unit, and a built-in auxiliary contact package (2 auxiliary switches + 1 trip alarm switch HQ) give the panel builder a clean way to signal breaker state back to the PLC or alarm annunciator without adding external relays. Front IP40 keeps dust out of the enclosure cutout; the 86 mm depth and 105 mm width fit standard MCCB panel footprints.
What the ratings mean for fit
The 63 A continuous rating at 40 °C is the number to size against your load current. Because the breaker holds full rating through 50 °C, you get a 10 °C thermal headroom margin before any derating kicks in — useful in a crowded panel where ambient runs warm. The 242 kA interrupting capacity at 240 V means this MCCB can safely clear a fault on a transformer secondary or a large-capacitor bank without upstream fuses needing to coordinate; at 690 V the breaking capacity drops to 5 kA, so verify your system voltage against the curve. The ETU350 electronic trip unit offers adjustable thermal and magnetic settings (not detailed in this listing), which lets the specifying engineer fine-tune the trip curve to the load — motor start vs. resistive heater vs. distribution feeder. The auxiliary switch package (2 form-C + 1 trip alarm) is pre-installed, saving a wiring step during panel build.