63 A continuous, flat derating curve to 70 °C
The Siemens 3VA2163-7MN36-0CC0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current, and critically — it holds that full 63 A without any derating from 40 °C all the way up to 70 °C ambient. That means in a crowded panel where internal temperature runs high, you don't have to oversize the frame or drop to a lower trip setting. The 3-pole design is specifically configured for motor protection, with phase failure detection built in. Breaking capacity is the headline here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA figure at 240 V is exceptional — it means this breaker can be placed at the main service entrance or on a high-fault bus without worrying about cascading failure upstream. The 3.7 kA at 690 V is the tail end, but for most industrial 400 V class systems the 242 kA is more than adequate for 99% of installations.
Motor protection package: UVR, auxiliary switches, and trip characteristics
This variant ships with an undervoltage release (UVR) factory-installed — part of the auxiliary release design — plus two HQ auxiliary switches. The UVR means the breaker trips immediately on loss of control voltage, which is standard for motor protection circuits where you want a guaranteed stop on power loss. The two HQ switches provide status feedback (open/closed) to a PLC or safety relay without needing an add-on module. The basic switch variant is 3VA2163-7MN36-0AA0, meaning this -0CC0 suffix adds the UVR and auxiliary switches as a factory-assembled package. No field retrofitting required — it arrives ready to wire into a motor starter or feeder circuit. Power loss is 6.5 W maximum, which is modest for a 63 A frame and keeps heat buildup manageable in a DIN-rail enclosure.
Physical fit: 86 mm depth, 105 mm width, 181 mm height
Dimensions are 86 mm deep, 105 mm wide, and 181 mm tall. That 105 mm width is standard for a 3-pole 63 A MCCB in the SENTRON 3VA2 platform — it fits the same panel footprint as other 3VA2 breakers in this current class. The 86 mm depth means it clears most standard enclosure depths without needing a deep gland plate. Mounting is via the rear DIN-rail clip or screw-mount lugs; no special adapter required.
Environmental range and approvals
Operating temperature spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. That covers most indoor industrial environments, including unheated warehouses. The 70 °C operating max aligns with the flat derating curve — no performance hit at the top end. Compliance documentation (RoHS, REACH, UL, IEC) is standard for Siemens SENTRON products; the UL and IEC listings are typically on the nameplate and available via the Siemens support portal.