What it is and what it does
The Siemens 3VA1180-3EF36-0DH0 is a SENTRON molded case circuit breaker (MCCB) configured for line protection — the role of guarding a feeder or distribution bus against overloads and short circuits. Its TM240 thermal-magnetic release handles the two trip curves: thermal for sustained overcurrent, magnetic for fast short-circuit clearing. Rated continuous current Iu is 80 A, which holds steady up to 50 °C ambient; above that it derates to 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C, so the 80 A rating stays usable in most standard panel ambient conditions without a frame-size bump.
Breaking capacity — what the numbers mean for your panel
This MCCB carries breaking capacities of 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. Those are the maximum fault currents it can safely interrupt at each voltage level — critical for ensuring selectivity and SCCR compliance downstream. At a typical 480 V distribution panel the 52.5 kA at 415 V figure (the closest published point) tells you the breaker handles high-fault scenarios common in industrial mains. The 690 V rating of 10.5 kA covers the less common 600 V class installations. Rated insulation voltage Ui is 800 V, confirming the insulation system is designed for 690 V line-to-line service.
Built-in auxiliaries and releases
The breaker ships with an undervoltage release (UVR) fitted — the release design is an undervoltage release (UVR). It also includes 2 auxiliary switches plus 1 trip alarm switch (HQ version), giving remote status of the main contacts and a separate alarm on a fault trip. A trip indicator is present on the front for local visual confirmation. The integrated auxiliary trip order code for the release is 3VA9608-0BB25, useful if you need a spare or replacement. No communication function, phase failure detection, or ground fault monitoring is built in — this is a plain line-protection MCCB, not a metering or communicating device.
Mounting and environment
The 3VA1180-3EF36-0DH0 measures 70 mm deep, 76.2 mm wide, and 130 mm high — a compact 3-pole footprint that fits standard SENTRON panel-mounting cutouts. Protection class on the front is IP40, so it is protected against tools and small solid objects but not sealed against moisture; install in a clean, dry enclosure. Operating temperature range is -25 °C to 70 °C, storage range -40 °C to 80 °C. The 76.2 mm width (3 inches on a standard DIN-related grid) and 70 mm depth keep it within typical panel depth limits for distribution boards.