The Siemens SENTRON 3VA1140-3EF36-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 40 A across the 40 °C to 50 °C band and derating to 37 A at 70 °C. Its interrupting capacity hits 75.6 kA at 240 V AC, 52.5 kA at 415 V, and 11.9 kA at 690 V — figures that govern selectivity coordination in a distribution panel. The 800 V rated insulation voltage gives headroom for 690 V line-to-line systems without derating the dielectric margin.
Breaking capacity and selectivity
At 415 V the 52.5 kA breaking capacity places this MCCB in the high-interrupting category for a 40 A frame — it clears faults up to that level without upstream fuse backup in most panel designs. The 32 kA at 440 V and 11.9 kA at 690 V track the expected voltage-derate curve; selectivity tables from the SENTRON manual should be consulted for coordination with upstream 3VA breakers or SIRIUS fuses.
Auxiliary and release configuration
Factory-fitted with 2 auxiliary switches plus a trip alarm switch (HQ) and a shunt trip release (STL). The shunt trip allows remote tripping from a PLC safety output or emergency-stop circuit. The auxiliary contacts report breaker position to the control system. No undervoltage release and no ground-fault monitoring on this variant — those functions are available on other 3VA order codes if needed.
Thermal derating and power loss
Rated 40 A from 40 °C through 50 °C ambient; drops to 39 A at 55–60 °C and 38 A at 65 °C, then 37 A at 70 °C (–). Maximum power loss is 10.8 W — relevant for enclosure heat rise calculations when grouping multiple breakers. Operating temperature range -25 °C to +70 °C; storage range -40 °C to +80 °C.
Lifecycle and sourcing
The lifecycle stage is marked as current production. This is an active Siemens SENTRON 3VA catalog line — no phase-out notice on record. Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.