The Siemens 3VA1140-5EF36-0AB0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in industrial distribution panels. It carries a continuous current Iu of 40 A across three poles, with a TM240 thermal-magnetic overcurrent release — meaning the thermal element is fixed at 40 A and the magnetic pickup is adjustable via the TM240 trip unit. The interrupting capacity at 240 V AC is 187 kA, dropping to 121 kA at 415 V AC, 75.6 kA at 440 V AC, and 17 kA at 690 V AC. These ratings are for AC networks; for DC applications, consult the 3VA device manual.
Thermal derating and panel fit
At ambient temperatures up to 50 °C the breaker holds its full 40 A rating without derating. Above that, the continuous current drops linearly: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. The operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Front IP40 protection means it is suitable for general indoor panel environments but not washdown areas. Dimensions are 76.2 mm wide, 130 mm high, 70 mm deep — a standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration.
Sourcing and compliance
The 3VA1140-5EF36-0AB0 is a current-production Siemens SENTRON MCCB. It is quoted to order against an RFQ through independent distribution channels. Compliance documentation (RoHS, REACH, UL, IEC) is provided by the manufacturer with the shipment. The rated insulation voltage Ui is 800 V, and the reference code per DIN EN 81346-2 is Q.