Siemens SENTRON 3VA1140-6EE36-0AA0 — 40 A MCCB with TM220 release
The Siemens SENTRON 3VA1140-6EE36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 40 A. It is fitted with a TM220 thermal-magnetic overcurrent release — the TM220 designation means the thermal (overload) element is fixed at 40 A, while the magnetic (short-circuit) pickup is adjustable up to 400 A (10× Iu), giving you a wide coordination window for motor or transformer inrush without nuisance tripping.
Breaking capacity across the voltage range
This MCCB delivers 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — numbers that put it in the high-interrupting class for industrial distribution. At 500 V and 690 V it still holds 17 kA, which covers most motor-circuit fault levels in 480/600 V class panels. The IEC 60947-2 standard these ratings are built to means the breaker can safely clear a bolted fault up to those levels without welding contacts or venting arc gas into the enclosure.
Thermal derating and panel integration
The 40 A rating holds flat from 40 °C to 50 °C, then derates gradually: 39 A at 55–60 °C, 38 A at 65 °C, and 37 A at 70 °C. In a sealed panel with multiple breakers ganged together, that derating curve is what you use for the fill-factor calculation — the full 40 A only applies if ambient inside the enclosure stays under 50 °C. Front IP40 protects against tools and wires, not hose-down; mount it in a clean indoor MCC or panelboard, not a washdown zone.
Lifecycle and sourcing
The lifecycle stage is marked as current production — this is an active catalog number in the SENTRON 3VA platform, not a phase-out or NRND line. The 3VA series succeeded the 3VL family and is the standard MCCB offering from Siemens for panelboard and distribution applications. Sourced to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Dimensions and physical fit
The breaker measures 130 mm high, 76.2 mm wide (3 inches — standard MCCB footprint for 3-pole 40 A frame), and 70 mm deep. That 70 mm depth is shallower than many 40 A MCCBs in the 3VA family, which helps when the gland plate or backplane clearance is tight. The width matches the 3-pole cutout in most Siemens panelboard interiors; no adapter plate needed.