Breaking capacity and thermal derating
Breaking capacity is a key fit criterion: the 3VA2063-7HL36-0KB0 interrupts 330 kA at 240 V, 242 kA at 415 V, and 3 kA at 690 V. The 415 V figure is the one most often checked for 400 V-class distribution panels — 242 kA covers most industrial main-breaker positions. At 690 V the 3 kA rating limits it to lower-fault applications, but that is typical for a 63 A frame. Thermal derating is mild: the breaker carries 63 A continuously from 40 °C through 50 °C, then drops to 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. In a warm panel (55 °C internal ambient) you lose about 2.4 A; plan the load margin accordingly.
Auxiliary and trip options
This variant ships with 2 auxiliary switches (HP type) and a shunt trip release (STL), but no undervoltage release, no communication module, and no ground-fault monitoring. The auxiliary switches provide status feedback to a PLC or annunciator panel. The shunt trip is wired to a remote pushbutton or safety relay for fast disconnection. If you need undervoltage protection or ground-fault sensing, you would step up to a different 3VA2 option code. The basic switch assembly is order code 3VA2063-7HL36-0AA0; the integrated auxiliary trip is 3VA9688-0BL33 — useful for spares planning.
Mechanical and environmental limits
The breaker is rated for 20,000 mechanical operations (endurance). Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C. Front protection is IP40 — suitable for enclosed panel mounting, not outdoor or washdown exposure. Rated insulation voltage is 800 V. Maximum power dissipation is 6 W, which is manageable for thermal calculations in a crowded enclosure. Dimensions are 105 mm wide, 181 mm high, 107 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation.