SENTRON 3VA1040-3ED36-0KH0 — 40 A MCCB for Line Protection
The SENTRON 3VA1040-3ED36-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated 40 A at 40 °C, designed for line protection in distribution panels. It carries a 75.6 kA breaking capacity at 240 V and 52.5 kA at 415 V, which means it safely interrupts high fault currents without cascading upstream — critical for selectivity coordination in a main or feeder breaker position. The 800 V rated insulation voltage confirms it is suitable for 400/480 VAC industrial networks with headroom to spare.
Breaking Capacity and Thermal Performance
Breaking capacity is rated at 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. These figures govern the maximum fault current the breaker can clear at each voltage level — a key parameter for panel SCCR compliance. Thermal current rating holds at 40 A from 40 °C through 50 °C, then derates to 38.4 A at 55 °C and 36 A at 70 °C. The 10.8 W maximum power loss at rated load should be factored into enclosure thermal calculations.
Auxiliary Circuit Configuration and Release Options
This variant ships with a shunt trip release (STL) for remote tripping — a standard requirement for emergency-stop circuits or supervisory control. The auxiliary switch block provides two auxiliary switches plus one trip alarm switch (HQ), giving the PLC or BMS both status and fault-signal contacts. No undervoltage release is fitted, so the breaker does not drop out on voltage sag; if UVR protection is needed, select a different suffix. The trip indicator and voltage trigger are present, confirming visual and electrical trip indication.
Physical Fit and Panel Integration
Dimensions are 70 mm depth, 76.2 mm width, and 130 mm height. The 3-pole MCCB mounts on a DIN rail or panel-mount base in a standard distribution board. The 76.2 mm width matches the 3-pole modular pitch for SENTRON 3VA breakers, so it occupies three 25.4 mm (1-inch) module spaces. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.