What this MCCB delivers for the panel
The Siemens 3VA1080-4ED32-0DH0 is a SENTRON 3-pole molded case circuit breaker rated 80 A at 40 °C, designed for line protection in distribution panels. Its 121 kA interrupting capacity at 240 V AC means it can clear high-fault currents without cascading upstream — critical for maintaining selectivity in a multi-breaker lineup. The 70 mm depth and 76.2 mm width fit standard DIN-rail mounting, so it drops into existing SENTRON panels without re-drilling gland plates.
Breaking capacity across voltages — the so-what
This breaker delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The steep drop above 500 V is typical for an MCCB of this frame size; if your system runs at 690 V, verify the available fault current stays under 11.9 kA or step up to a higher-rated frame. The 800 V rated insulation voltage backs the 690 V application.
Thermal derating — real-world current capability
Rated 80 A from 40 °C through 50 °C, then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. In a crowded panel where ambient hits 55 °C, you lose 2 A — still within most motor-circuit sizing margins. The 21.7 W maximum power loss is the heat the breaker dumps into the enclosure; factor that into your thermal budget if the panel is sealed.
Integrated auxiliaries and release
Comes with 2 auxiliary switches plus a trip alarm switch (HQ), and an undervoltage release (UVR). The UVR trips the breaker when control voltage drops — standard for emergency-stop chains or undervoltage protection on motor feeders. The auxiliary switches report breaker position back to a PLC or status lamp without extra wiring.
Lifecycle and compliance posture
The lifecycle stage is marked as current — this is an active-production part in the SENTRON line. No PCN or EOL notice on record. For compliance documentation (RoHS, REACH, UL, IEC), the standard Siemens declarations apply; request them with your RFQ if your quality doc control requires them on file before BOM freeze.