What it is and what it does
The SENTRON 3VA1080-2ED36-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with an 80 A continuous current at 40 °C and a breaking capacity of 52.5 kA at 240 V AC — enough to handle high-fault utility feeds or transformer secondaries without cascading upstream. It carries an undervoltage release (UVR) and two auxiliary switches plus a trip alarm switch, so it can signal a remote PLC or drop a contactor coil on loss of control voltage.
Breaking capacity and derating — what the numbers mean
The 52.5 kA at 240 V is the headline interrupt rating, but the real-world fit depends on the system voltage. At 415 V it still breaks 32 kA, and at 690 V it holds 7.5 kA — that is a solid SCCR for a 3-pole MCCB in a 400/690 V distribution panel. The 80 A rating holds flat from 40 °C to 50 °C, then derates to 74 A at 70 °C; if your panel runs hot, you lose about 6 A off the top. Insulation voltage is rated 800 V, so it is fine for 690 V line-to-line systems.
Panel fit and integration
The 3VA1080-2ED36-0DH0 measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard 3-pole MCCB footprint that drops into most SENTRON distribution panels or standalone enclosures without re-drilling. The undervoltage release (UVR) is built in, so you do not need a separate shunt-trip module for loss-of-voltage protection. Two auxiliary contacts and a trip alarm switch give you feedback for status monitoring or interlocking.