Siemens 3VA1180-5EF32-0AF0 — 80 A MCCB for Line Protection
The Siemens SENTRON 3VA1180-5EF32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a TM240 thermal-magnetic release and a rated continuous current Iu of 80 A. It carries a 187 kA interrupting rating at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — these numbers define the maximum fault current it can safely clear at each voltage level without upstream coordination failure. Rated insulation voltage Ui is 800 V, and the breaker maintains full 80 A current rating from 40 °C through 50 °C ambient; above that it derates gradually to 72 A at 70 °C. The TM240 release is adjustable for the long-time pick-up, with a maximum delay tr of 1 s — useful for coordinating with downstream branch breakers on motor or feeder circuits.
Panel Fit and Mounting
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — the width is a standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration. IP40 on the front means the breaker is protected against tools and small wires entering the face, but the enclosure itself must handle the rest of the environment. The auxiliary contact configuration ships as 1 auxiliary switch plus 1 trip alarm switch (HQ type) — wired separately from the main power path for remote status indication. No undervoltage release, no communication module, no ground-fault monitoring on this variant.