What this 3VA1140-4EF36-0AF0 is and what it does
The Siemens SENTRON 3VA1140-4EF36-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A continuous current across an ambient range of 40 °C to 50 °C, with a slight derating to 37 A at 70 °C. Its interrupting capacity hits 121 kA at 240 V AC and 75.6 kA at 415 V AC, which puts it in the high-fault-current class for industrial distribution panels. The TM240 thermal-magnetic trip unit handles overload and short-circuit protection for line (feeder) duty — no ground-fault monitoring, no undervoltage release, no communication module on this variant.
Sizing and selectivity for the panel
At 70 mm deep, 76.2 mm wide, and 130 mm tall, this MCCB fits the standard SENTRON 3VA mounting footprint — same width as the 3VA1110 frame, so it drops into the same panel cutout and busbar arrangement without re-drilling. The 800 V rated insulation voltage (Ui) gives headroom for 480 V and 600 V class systems. Power loss maxes out at 10.8 W, which matters for thermal coordination inside a sealed enclosure. The built-in 1 auxiliary switch plus 1 trip alarm switch (HQ design) provides status feedback to a PLC or annunciator without needing an add-on module.
What's inside the can
The supplied basic switch carries order code 3VA11404EF360AA0. The auxiliary switch configuration is 1 HQ auxiliary switch plus 1 HQ trip alarm switch — that's two discrete outputs for remote indication. No communication function, no voltage trigger, no other measurement function. Storage temperature range is -40 °C to 80 °C; operating range is -25 °C to 70 °C.