The Siemens SENTRON 3VA1140-5EF36-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated 40 A at 40 °C, with a TM240 thermal-magnetic release. It is designed for line protection in distribution panels and switchgear, delivering a breaking capacity of 187 kA at 240 V and 121 kA at 415 V — enough headroom for high-fault utility feeds or transformer secondaries.
The 3VA1140-5EF36-0AH0 measures 70 mm deep by 76.2 mm wide by 130 mm tall, fitting standard panel cutouts and DIN-rail or screw-mount backplates. It ships with 2 auxiliary switches plus 1 trip alarm switch (HQ) for status feedback to a PLC or annunciator.
Insulation voltage is rated at 800 V, and maximum power loss is 10.8 W — both figures that matter for thermal coordination inside a dense panel. The TM240 release provides a fixed thermal pickup and magnetic trip tailored for cable and light motor protection.