What the ratings mean for your panel
The Siemens 3VA2463-5JQ32-0CL0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 630 A at 40 °C. That 630 A figure is the thermal benchmark — above 40 °C you derate linearly: 600 A at 45 °C, 570 A at 50 °C, all the way down to 450 A at 70 °C. For a panel sitting at 50 °C ambient, the real usable current is 570 A, not the headline number. The ETU560 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves — it's not a fixed thermal-magnetic; you commission the settings to coordinate downstream. Breaking capacity is the other headline: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. That 187 kA at 240 V is high — it handles faults near the transformer secondary without needing a current-limiting fuse upstream. At 690 V the 17 kA figure is still respectable for most industrial distribution, but if your fault current exceeds that, you'll need a series-rated combination or a higher-rated frame. The 800 V rated insulation voltage (Ui) confirms it's built for 690 V systems with margin. Three poles, 248 mm tall, 138 mm wide, 110 mm deep — it fits standard Siemens SENTRON mounting patterns. The auxiliary contact configuration is 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch (HQ version), which gives you status feedback for PLC or remote monitoring without adding a separate module. An undervoltage release (UVR) is integrated (design: undervoltage release), and the ground-fault monitoring uses summation current formation on the L-conductor — that's a residual-current method, not a zero-sequence sensor.
Lifecycle and sourcing posture
Mechanical endurance is rated at 15,000 operations. Maximum power loss of 164.5 W requires accounting for heat dissipation in the enclosure.
Integration and compliance
Mounts in a standard SENTRON panel footprint. The 138 mm width and 110 mm depth leave room for side-mounted accessories. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Compliance documentation (RoHS, REACH, UL, IEC) is standard for Siemens SENTRON products; the ETU560 release carries IEC 60947-2 certification. No voltage trigger — that means no shunt trip or undervoltage release as a factory-installed trigger; the UVR is a separate release. Phase failure detection is not built in, so if you need that, you'll rely on the ETU560's phase-loss sensitivity or an external relay.