Siemens 3VA2110-7HN36-0AA0 — SENTRON MCCB, 100 A, ETU350, 3-Pole
The Siemens 3VA2110-7HN36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. It carries a 3-pole design with an ETU350 electronic overcurrent release, and the interrupting capacity hits 330 kA at 240 V, 242 kA at 415/440 V, and 187 kA at 500 V. At 690 V the rating drops to 3.7 kA, so this is a part sized for low-voltage distribution up to 600 V class, not 690 V main feeds.
The 100 A continuous rating with no thermal derating from 40 °C to 70 °C means this breaker holds its full ampacity in a warm enclosure — a common pain point for tightly packed panels where ambient climbs. The ETU350 electronic trip unit gives adjustable long-time, short-time, and instantaneous protection curves, so it can be coordinated downstream of a larger feeder breaker. The interrupting capacity at 240 V (330 kA) is high enough for most transformer-secondaries and large service entrances; at 480 V systems the 242 kA still covers high-fault scenarios. The 800 V rated insulation voltage (Ui) confirms it can be used in 690 V systems, but the 3.7 kA interrupting capacity at that voltage limits its application there to low-fault-current branches.
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. The 3-pole frame fits standard Siemens 3VA mounting patterns — no special adapter plate needed for most switchboard or panelboard cutouts. Front IP40 protection means it's suitable for general indoor panel use but not washdown environments.