What this 4-pole MCCB delivers
The Siemens SENTRON 3VA1140-6EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 40 A continuous current at 40 °C ambient, with a TM220 thermal-magnetic overcurrent release — meaning the thermal trip element and magnetic short-circuit response are fixed, not field-adjustable beyond the factory calibration. It is designed for line protection (not motor or generator protection), so it sits upstream in a distribution panel protecting cable and bus against overload and short-circuit faults. Breaking capacity is the headline number here: 220 kA at 240 VAC, 154 kA at 415 VAC, and still 121 kA at 440 VAC — figures that put it in the high-interrupting-capacity class for industrial switchboards where available fault current is severe. At 500 V and 690 V the rating drops to 17 kA, so verify the system voltage against the curve before specifying. Current derating with ambient temperature is published per the table: 40 A holds through 50 °C, then steps down to 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C.
Integration and panel fit
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a 4-pole MCCB footprint that fits standard Siemens SENTRON mounting plates and busbar systems. The front face carries an IP40 protection rating, suitable for enclosed distribution boards where tools are required to access live parts. Rated insulation voltage is 800 V, and maximum power loss at rated current is 10.8 W — a figure to include in thermal enclosure calculations if the panel is tightly packed. No undervoltage release, no shunt trip (voltage trigger), no communication module, and no ground-fault monitoring on this variant — it is a straight thermal-magnetic breaker for basic line protection. The TM220 release designation indicates a specific thermal and magnetic calibration curve; consult the 3VA device manual for the exact trip characteristic.