The Siemens SENTRON 3VA2063-6HN32-0HL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the entire 40 °C to 70 °C operating range — no derating needed up to that ambient ceiling. Interrupting capacity hits 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. That 242 kA at 240 V tells you it handles high-fault utility feeds without cascading an upstream breaker.
What the ratings mean for your panel
This breaker is dimensioned at 105 mm wide, 181 mm tall, and 86 mm deep — standard SENTRON 3VA2 frame size. It mounts on a DIN rail or bolts into a panel; the 86 mm depth keeps it inside shallow enclosures where a deeper MCCB would hit the gland plate or door. Power loss is 5.4 W maximum, so thermal rise in a tightly packed cabinet stays manageable without forced ventilation. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch plus 1 electrical alarm switch HQ. That gives you separate dry contacts for remote status — trip indication, breaker position, and a dedicated alarm on fault. The shunt trip (STL) release is built in, so you can remotely trip the breaker from a safety PLC or E-stop circuit. No undervoltage release is fitted on this variant.
Storage and handling limits
Storage temperature range is -40 °C to 80 °C; operating ambient is -25 °C to 70 °C. If this breaker sits in an unheated warehouse or ships through a cold chain, the storage floor is low enough for most climates. The 63 A rating holds steady across the full operating band — no derating curve to track between 40 °C and 70 °C.