What it is and what it does
The Siemens 3VA2163-7MN32-0AE0 is a SENTRON molded case circuit breaker (MCCB) designed specifically for motor protection. It carries a continuous current rating of 63 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed as the panel warms up. The 3-pole construction with phase failure detection means it trips on a lost phase, which is the primary cause of motor burnout in three-phase loads like pumps and conveyors.
Interrupting capacity — what the numbers mean for your panel
This MCCB's interrupting rating drops sharply with voltage: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. The 690 V figure is the one that matters for 690 V line-to-line systems — it's still adequate for most motor branch circuits at that voltage, but it's not a high-fault device at 690 V. The high values at 240 V through 500 V mean it handles fault currents typical of large transformer-fed panels without cascading upstream.
Built-in auxiliary switching and trip characteristics
The breaker comes with four factory-installed HQ auxiliary switches, giving you status feedback for PLC inputs or alarm panels without adding external contact blocks. The trip time is adjustable between 4 s and 17 s, which suits the starting curve of most induction motors — set it long enough to avoid nuisance tripping during start-up, short enough to clear a locked-rotor fault. The basic switch module is order code 3VA2163-7MN32-0AA0, so if you need a replacement internal switch, that's the spare part number.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep. That's a standard 3-pole MCCB footprint — it mounts on a DIN rail or direct panel-mount via the rear slots. The 86 mm depth is shallow enough for most 200 mm deep enclosures, leaving room for wiring gutters. No undervoltage release, no communication module, no ground-fault monitoring — it's a straight motor-protection breaker with phase failure detection and auxiliary contacts.