What it is and what it does
The Siemens 3VA1180-4ED42-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — it sits upstream of loads as a main or feeder breaker, not as a motor circuit protector. Four poles handle three-phase-plus-neutral or dual-fed configurations. The TM210 overcurrent release provides fixed thermal-magnetic trip: thermal for overload, magnetic for short-circuit. Rated 80 A continuous at 40 °C, it carries the full current without derating up to 50 °C; at 70 °C it still holds 74 A, so panel ambient heat won't force an upsizing in most enclosures. Breaking capacity is the headline: 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V. That 121 kA at 240 V means it can interrupt a fault current of that magnitude without damage — critical for high-fault service entrances or transformer secondaries where available fault current is high. The 11.9 kA at 690 V covers 690 V line-to-line systems common in heavy industrial drives and mining gear.
Integration and mounting
Mounts on a DIN rail or panel-mount via the standard SENTRON 3VA footprint. Dimensions: 101.6 mm wide, 130 mm tall, 70 mm deep — a 4-pole MCCB that fits a 4-module-wide DIN slot. IP40 on the front protects against tools and wires inside the panel; no IP rating on the sides, so keep clearance to grounded metal per Siemens mounting guidelines. Rated insulation voltage is 800 V, so the breaker is safe for use in 690 V systems with adequate clearance. Maximum power loss is 19.2 W at rated load — negligible for panel thermal calculations but worth noting if the breaker is in a sealed enclosure with other heat sources.