Rated current and thermal derating
The 3VA1163-5EE32-0CH0 carries a continuous rated current of 63 A at an ambient of 40 °C. That rating holds flat through 50 °C, then begins a controlled derating: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. For a panel builder pushing ambient toward 60 °C in a sealed enclosure, the 61 A figure is the one to design against — not the 63 A nameplate.
Breaking capacity across voltage levels
Breaking capacity drops as system voltage rises, which is expected for an MCCB. At 240 V AC the part interrupts 187 kA; at 415 V AC it's 121 kA; at 440 V AC it's 75.6 kA; at 500 V and 690 V AC it holds at 17 kA. The 187 kA figure at 240 V suits high-fault industrial services where the transformer is close to the panel. The 17 kA floor at 690 V still covers most motor-control applications per IEC 60947-2.
Configuration and auxiliary content
This is a 3-pole line-protection MCCB with a built-in undervoltage release (UVR) and a complement of two auxiliary switches plus one trip alarm switch (HQ). The UVR ensures the breaker drops out on loss of control voltage — a standard requirement for safety circuits in machine tools and conveyors. The auxiliary switch count gives the PLC or DCS a dedicated feedback path for both the breaker position and the trip event, without sharing contacts.
Physical fit and panel integration
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 70 mm depth is the dimension that matters when the breaker sits on a DIN rail inside a shallow wall-mount enclosure — verify the gland plate clearance before routing cables. The 76.2 mm width (3 inches) is the standard 3-pole MCCB footprint; it occupies a single 3-module position on the rail.