What this 4-pole 160 A MCCB covers
The Siemens SENTRON 3VA1116-3FD46-0AA0 is a 4-pole molded case circuit breaker rated 160 A continuous, built for line protection in distribution panels and feeder circuits. Its TM210 thermal-magnetic release handles overload and short-circuit protection without onboard communication — a straightforward fit for a main or branch breaker position where you need a hard-wired, no-nonsense interrupting device. Rated insulation voltage sits at 800 V AC, and the interrupting ratings climb to 75.6 kA at 240 V and 52.5 kA at 415 V. At 440 V it still holds 32 kA, dropping to 11.9 kA at 500 V and 690 V. That curve tells you this breaker is sized for high-fault-capacity industrial feeds — think transformer secondaries or large motor control center mains — not light commercial subpanels.
Thermal derating and real-world current
The 160 A rating holds flat from 40 °C through 50 °C. At 55 °C it derates to 158 A, then 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C. If your panel ambient runs above 50 °C — common in tightly packed enclosures or near furnace lines — you lose roughly 6% of capacity at the top end. Plan your load margin accordingly; this breaker will carry 160 A continuous in a 40 °C environment without complaint.
Footprint and panel integration
Depth is 70 mm, width 101.6 mm, height 130 mm. That 4-inch-wide body is standard for a 160 A 4-pole MCCB in the SENTRON 3VA platform — it fits the same cutout and bus-bar spacing as other 3VA frame sizes. The front face carries an IP40 protection class, adequate for enclosed panel mounting but not for washdown environments. Optional motor drive is available as a field-addable accessory, letting you motorize the breaker for remote trip-and-reset in unattended gear. The N-conductor protection is set to 50% of the phase rating, which is the typical spec for a 4-pole breaker on a 3-phase + N system where the neutral is not fully rated.