What this MCCB carries and where it fits
The Siemens 3VA1110-5MH32-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for starter protection — meaning it's built to handle motor inrush and protect the branch circuit, not just resistive loads. Three poles, rated 100 A at 40 °C, with a TM120M thermal-magnetic release that gives fixed thermal and magnetic trip thresholds. Breaking capacity runs 187 kA at 240 V, 121 kA at 415 V, and still holds 7.5 kA up to 690 V — serious SCCR headroom for industrial panels where fault current is high.
Thermal derating and real-world current
Rated 100 A from 40 °C to 50 °C, then it starts to pull back: 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, 91 A at 70 °C. If your panel ambient sits above 50 °C, factor the derating into your load schedule. The TM120M release is fixed — no interchangeable trip units — so what you see on the nameplate is what you get. Insulation voltage rated 800 V, which covers most 480/600 V systems with margin.
Lifecycle and sourcing posture
Listed as current production — no phase-out notice on this order code. That means you can spec it into a new BOM without worrying about a last-time-buy window. Sourced and quoted to order against an RFQ; availability and current pricing confirmed at quote time through independent distribution channels.
Panel fit and dimensions
Mounts on a standard DIN rail or direct panel surface. Width 76.2 mm (3 in), height 130 mm (5.12 in), depth 70 mm (2.76 in). Three-pole footprint leaves room for side-mounted accessories; no undervoltage release or shunt trip on this variant — verify if your safety circuit needs one. Front IP40, suitable for enclosed panel use, not open washdown.