What it is and what it does
The Siemens SENTRON 3VA2163-5JQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. It is designed for line protection in distribution panels and switchboards, with a communication function for integration into higher-level monitoring systems and ground-fault monitoring via summation current formation on the L-conductor.
Breaking capacity — what the ratings mean for your fault-current study
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V and at 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The 187 kA figure at 240 V covers high-fault utility feeds in North American panels; the 121 kA at 415 V handles the common industrial fault level in IEC 60947-2 installations. At 690 V the capacity drops to 3.7 kA — adequate for most 690 V motor circuits but verify against your system's prospective short-circuit current.
Physical fit and panel integration
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard MCCB footprint for 3-pole frames in this current class. The 105 mm width matches the common 4-module (4 x 27 mm) DIN-rail spacing used in SENTRON distribution boards, so it drops into an existing panel without re-drilling the mounting plate.