What it is and what it does
The Siemens 3VA2063-6HL32-0CH0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in industrial distribution panels. It carries a massive 242 kA breaking capacity at 240 V AC — that's the fault it can safely interrupt without welding contacts or rupturing the case, which matters when you're coordinating downstream breakers in a high-fault installation like a transformer secondary or a large motor control center.
Breaking capacity across voltages
The interrupting rating drops as voltage climbs: 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. That 3 kA figure at 690 V is a hard limit — if your system runs 690 V with higher available fault current, this breaker won't clear it and you need a higher-rated frame. The 242 kA at 240 V is the headline number, but the 187 kA at 415 V is what most European 400 V panels will actually see.
Thermal performance and panel fit
The breaker holds 63 A continuously across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which is unusual for an MCCB and simplifies panel design. It measures 105 mm wide by 181 mm tall by 86 mm deep, a 3-pole footprint that fits standard SENTRON mounting plates. The 86 mm depth (3.39 in) is shallow enough for most 200 mm deep enclosures without crowding the gland plate.
Built-in auxiliaries and releases
This variant ships with an undervoltage release (UVR) factory-installed — the coil drops the breaker if control voltage falls below a set threshold, standard for emergency-stop circuits and undervoltage protection schemes. It also carries two auxiliary switches plus a separate trip alarm switch (HQ configuration), so you get status feedback for open/closed and tripped states without adding external modules. No communication function onboard, no ground-fault monitoring — this is a straight line-protection breaker with hardwired signals.