What this MCCB delivers
The Siemens 3VA1110-4EE46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with four poles and a TM220 thermal-magnetic overcurrent release. Continuous current is 100 A up to 50 °C, derating to 91 A at 70 °C — the full thermal curve is on record so you can size for your panel ambient without guesswork. Breaking capacity hits 121 kA at 240 V, 75.6 kA at 415 V, and still holds 11.9 kA at 690 V. That 121 kA figure at 240 V is the headline number for high-fault panels in North American distribution — it clears a bolted fault upstream of a 100 A feeder without the arc flash energy escalating. Insulation voltage is rated 800 V, and the front face carries IP40 protection — fine for a clean indoor panel, but not for washdown zones. Power loss at full load is 25 W, which matters for thermal budgeting inside a crowded enclosure.
Panel fit and mounting
Dimensions are 130 mm high, 101.6 mm wide, 70 mm deep — a standard 4-pole MCCB footprint that drops into most SENTRON distribution blocks and panelboards without re-drilling. No undervoltage release, no communication module, no ground-fault monitoring on this variant; it is a straight thermal-magnetic line-protection breaker.
What the TM220 release means for coordination
The TM220 designation means a fixed thermal pickup and a magnetic trip that is adjustable across a 5–10x In range. For a 100 A breaker, that puts the instantaneous magnetic trip between 500 A and 1000 A. That adjustability lets you coordinate downstream with branch-circuit breakers or motor starters without oversizing the feeder.