The 3VA1120-5EF32-0JA0: Rated 20 A continuous at 40 °C, it holds that rating flat through 55 °C, then derates to 19 A at 60 °C and 70 °C — useful to know if this breaker sits in a warm enclosure near other heat sources. The breaking capacity is what makes this part stand out: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and still 17 kA at 500 V and 690 V. That kind of interrupting capability means it can be placed upstream in a high-fault panel without worrying about cascading failure through the switchgear. The TM240 release provides thermal-magnetic protection — the thermal element handles overloads, the magnetic element clears short-circuits. The shunt trip (STL) allows remote tripping from a control signal, which is essential for emergency-stop circuits or supervisory shutdown schemes. Rated insulation voltage is 800 V, and maximum power loss runs 12 W, which factors into enclosure ventilation calculations.
Panel fit and mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a standard 3-pole MCCB footprint that drops into SENTRON distribution panels and most DIN-rail or base-mount enclosures without modification. The supplied basic switch is order code 3VA11205EF320AA0, which is the internal switching mechanism; the complete breaker ships as a single assembly ready for busbar connection.