Siemens 3VA2063-5JQ32-0HA0 — 63 A MCCB with ETU560, 187 kA IC at 240 V
The Siemens 3VA2063-5JQ32-0HA0 is a SENTRON 3-pole molded case circuit breaker rated for 63 A continuous current at 40 °C, with a breaking capacity of 187 kA at 240 V — that's the headline number for high-fault panels where the utility transformer can dump serious energy into a bolted fault. At 415 V and 440 V it still holds 121 kA, dropping to 79 kA at 500 V and 3.4 kA at 690 V. The ETU560 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, plus ground-fault protection via summation current sensing. A built-in shunt trip (STL) and communication function are standard, so it can be remotely tripped and integrated into a BMS or SCADA system. No undervoltage release, no auxiliary contacts, no phase-failure detection — those are separate add-ons if your scheme needs them.
What the ratings mean for your panel
The 187 kA at 240 V is the interrupting rating — it tells you this MCCB can safely clear a fault up to that current without welding contacts or rupturing the case. That's essential for service-entrance or main-breaker duty where available fault current is high. At 690 V the rating drops to 3.4 kA, so if you're on a 690 V system (common in mining or marine), verify the available fault current doesn't exceed that. The 63 A rating holds flat from 40 °C to 50 °C, then derates to 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C — so in a hot enclosure you lose about 15% of capacity at the top end. The ETU560 release allows you to set the long-time pickup (Ir) from 0.4 to 1.0 x In, short-time pickup (Sd) from 1.5 to 10 x Ir, and instantaneous (Ii) from 1.5 to 12 x In, giving you selectivity coordination downstream. Power loss is 5.4 W maximum — negligible for thermal budgeting in a typical panel.
Panel integration notes
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep.