The Siemens 3VA2063-5KP32-0JL0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection, rated 63 A continuous on a 3-pole frame. It carries a maximum breaking capacity of 187 kA at 240 V AC, stepping down to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — covering most industrial distribution voltages without needing a frame size bump.
Ratings and what they mean for fit
The 63 A rating holds flat across the full operating temperature range from 40 °C to 70 °C — no derating needed in a warm panel. The adjustable thermal-magnetic trip range (95 A minimum to 756 A maximum) means this frame can be tuned for loads well below or above the 63 A continuous rating, though the 63 A continuous is the hard limit for uninterrupted service. Breaking capacity at 240 V (187 kA) is high for a 63 A frame — it safely interrupts faults on high-capacity transformers without cascading upstream. At 415 V the 121 kA rating still covers most industrial secondary distribution. The drop to 3 kA at 690 V is typical for this class; if your fault current at 690 V exceeds that, you need a higher-rated frame. Power loss is 5.4 W maximum, low enough that ventilation spacing is standard. The auxiliary switch complement — 2 auxiliary switches, 1 trip alarm, 1 electrical alarm — and a shunt trip release (STL) are built in, so you don't need to order separate accessory kits for remote status and trip.
Integration and mounting
The 3VA2063-5KP32-0JL0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. It includes trip and voltage indicators for quick visual status checks on the panel door.