160 A MCCB with 220 kA interrupting capacity — what the ratings mean for your panel
The Siemens 3VA1116-6EF36-0AH0 is a 3-pole SENTRON molded case circuit breaker rated for 160 A continuous current (Iu) and carrying a TM240 thermal-magnetic release — meaning the thermal trip element is fixed at 160 A, not adjustable up to 240 A, so it protects a 160 A feeder or main without field tweaking. Its interrupting capacity hits 220 kA at 240 V AC, 154 kA at 415 V, and 75.6 kA at 440 V — figures that put it in the high-fault category for industrial mains and large sub-distribution boards where available fault current exceeds 100 kA. At 690 V it still clears 17 kA, so it handles step-up transformer secondaries or 690 V drives. The breaker is rated for line protection (not motor or generator protection), which means its trip curve is shaped for cable and busbar thermal limits rather than motor inrush. The auxiliary contact configuration comes as 2 auxiliary switches plus 1 trip alarm switch (HQ type) — enough to signal position and fault status back to a PLC or SCADA input without adding a separate accessory block.
Thermal derating across the panel ambient range
The 160 A rating holds flat from 40 °C through 50 °C ambient — no derating needed in a typical ventilated enclosure. At 55 °C it steps to 153.6 A, at 60 °C to 150.4 A, at 65 °C to 147.2 A, and at 70 °C to 144 A. That last figure is the maximum operating ambient the breaker itself can tolerate; storage range is wider at -40 °C to 80 °C. The front face carries IP40 protection — fine for a clean indoor panel, but not for washdown or outdoor installation without an additional enclosure. The breaker occupies 76.2 mm width (roughly 3 inches of DIN or mounting-plate space) and 70 mm depth, so it fits standard 160 A frame cutouts in most switchboard layouts.
Lifecycle and sourcing posture
The 3VA1116-6EF36-0AH0 is in its current lifecycle stage — meaning Siemens still lists it as an active catalog number with no announced phase-out or last-time-buy. That makes it a safe BOM line for new panel designs and a reliable spare for existing installations.