Siemens 3VA2510-5KQ32-0AE0 — 1000 A SENTRON MCCB with ETU860 Trip Unit
The Siemens 3VA2510-5KQ32-0AE0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 1000 A at 40 °C through 55 °C, derating to 955 A at 60 °C, 885 A at 65 °C, and 815 A at 70 °C. Its interrupting capacity reaches 187 kA at 240 VAC, 121 kA at 415 VAC, and 53 kA at 690 VAC — figures that govern selectivity coordination in high-fault-current distribution panels. The ETU860 electronic trip unit provides adjustable long-time delay (tr) from 0.5 s to 25 s and short-time delay (tsd) from 0.05 s to 0.5 s, with Ir adjustable up to the full 1000 A rating.
At 415 V, the 121 kA breaking capacity places this MCCB in the high-interrupting category for industrial main feeders. The 53 kA at 690 V covers 690 V line-to-line systems common in mining and marine installations. These ratings are the values to enter into a selective coordination study per IEC 60947-2.
Above that, derate linearly: 955 A at 60 °C, 885 A at 65 °C, 815 A at 70 °C (–). Maximum power loss is 123 W, which factors into enclosure heat rise calculations — expect a non-trivial contribution to the panel's thermal budget at full load.