What this MCCB is and what it does
The Siemens 3VA2163-5JP32-0AF0 is a SENTRON molded case circuit breaker (MCCB) built for line protection in industrial power distribution. It carries a continuous current rating of 63 A across the full ambient range from 40 °C to 70 °C, meaning no derating needed when the panel runs hot — that's the same 63 A at 70 °C as it is at 40 °C. The adjustable thermal-magnetic trip unit covers a range from 95 A minimum to 756 A maximum, so you set the instantaneous pickup to match the inrush of your motor or transformer load without swapping the breaker body.
Breaking capacity — what it means for your fault duty
This MCCB interrupts 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The 187 kA figure at 240 V covers high-fault panels fed close to a transformer; the 121 kA at 415 V handles most European industrial mains. At 690 V the capacity drops to 3.7 kA, so verify your available fault current if you're using this on a 690 V system.
Mounting and panel fit
At 105 mm wide, 181 mm tall, and 86 mm deep, this 3-pole MCCB fits standard panel cutouts for SENTRON 3VA2 frames. The depth of 86 mm (3.39 in) matters when you're laying out bus bars or rear-access wiring — make sure your enclosure depth clears it with room for cable bending radius.
Auxiliary and communication options
Factory-fitted with one auxiliary switch and one trip alarm switch (HQ type), so you get remote status of the breaker position and a separate signal when it trips on fault. The base switch variant is 3VA21635JP320AA0. Communication function is built in, which on the 3VA2 platform typically means PROFIBUS or PROFINET capability for integration into a higher-level control system.