What this MCCB is and what it does
The Siemens SENTRON 3VA1080-2ED36-0DA0 is a 3-pole molded case circuit breaker (MCCB) designed for line protection — meaning it sits at the feeder or branch level to guard against overload and short-circuit faults before they reach downstream loads. It carries an 80 A rating at 40 °C ambient, with a TM210 thermal-magnetic overcurrent release that provides fixed thermal and magnetic trip settings for standard distribution applications. The 52.5 kA breaking capacity at 240 V gives it headroom for high-fault installations, while the 800 V rated insulation voltage confirms it can be used in 480 V and 600 V class systems without derating the insulation.
Ratings that matter for panel fit
The 80 A current rating holds steady from 40 °C through 50 °C, then derates gradually to 74 A at 70 °C. That means in a warm enclosure — say a non-ventilated panel near a process line — you still get full 80 A up to 50 °C, which is the typical upper bound for most industrial control panels. The interrupting ratings step down with voltage: 52.5 kA at 240 V, 32 kA at 415 V, 13.6 kA at 440 V, and 7.5 kA at 500 V and 690 V (–). For a 480 V panel, the 13.6 kA figure is the one that governs SCCR coordination with upstream gear.
Built-in undervoltage release
This order code includes an undervoltage release (UVR) as the auxiliary release. The UVR trips the breaker when supply voltage drops below a set threshold — a common requirement for motor control centers where you want the breaker to open on a brownout so the motor doesn't re-accelerate uncommanded when power returns. The TM210 release is the overcurrent element; the UVR is separate and wired to the control voltage.
Dimensions and panel integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. The 76.2 mm width is a standard 3-inch footprint for a 3-pole MCCB in this frame size, so it fits existing panel cutouts and busbar spacing common to SENTRON and other IEC distribution boards. The 70 mm depth keeps it within typical enclosure depth allowances for wall-mount panels.