What this MCCB does and where it fits
The Siemens 3VA2163-5JQ32-0AG0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — the main disconnect and fault protection for a feeder or large branch circuit in a 3-phase distribution panel. It's rated 63 A continuously at 40 °C and can interrupt fault currents up to 187 kA at 240 V AC, so it's sized for high-available-fault installations like industrial switchgear or utility tie points where the upstream transformer can push serious energy into a short. The 3-pole frame handles three-phase loads: motors, heating banks, lighting panels, or a sub-distribution board.
Breaking capacity by voltage — know your SCCR
This MCCB's interrupting rating varies with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. For a 480 V panel (common in North America) the 75.6 kA rating covers most industrial service-entrance requirements. At 690 V the 3.7 kA limit means it's not suitable for high-fault 690 V circuits — you'd need a higher-rated frame for that. Always match the breaker's SCCR to the available fault current at the point of installation.
Physical fit and panel integration
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that fits most distribution panelboards and switchgear cubicles. The depth of 86 mm (3.39 in) leaves room for rear-connection bus bars or cable lugs without crowding the enclosure back wall. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C, so it's fine for unheated electrical rooms or outdoor enclosures in temperate climates.
Built-in communication and auxiliary switching
This MCCB includes a communication function, so it can report status and trip events to a PLC or BMS over the SENTRON bus system — useful for remote monitoring in a distributed plant. The auxiliary switch configuration (1 auxiliary + 1 trip alarm switch, HP type) provides a dry contact for the breaker's open/closed state and a separate contact that closes only on a trip, so a control system can differentiate between a manual open and a fault. No undervoltage release is fitted, so it won't drop out on a sag — that's by design for line protection where you want the breaker to stay closed unless a fault or manual command opens it.