Siemens 3VA6816-6KT31-0AA0 Low Voltage Circuit Breaker

Siemens 3VA6816-6KT31-0AA0 is a three-pole low-voltage molded‑case circuit breaker from the Siemens 3VA6 UL‑frame family, rated In 1600 A and operating up to 600 V (insulation voltage up to 800 V). It ships with an ETU856 electronic trip unit and LSI protection, offering adjustable overload and short‑circuit protection with Ir from 600 to 1600 A, Isd 0.6–10×In, and Ii 1.5–7.5×In, and it carries HACR Type capabilities for motors and HVAC loads. The device provides a short‑circuit breaking capacity up to 65 kA at 480 V (class H) and weighs about 23.9 kg, making it suitable for heavy feeder protection in industrial or commercial distribution panels. The 3VA6 frame design supports UL489 compatibility and is designed for industrial protection applications where high current and fault‑level protection are required; this model is often associated with SENTRON installations and can be configured with optional features such as ground‑fault monitoring. Mechanical service life is typically around 3,000 cycles, while electrical endurance ranges from 1,500 cycles at common low‑voltage ratings (380/415 and 480 V) to 500 cycles at higher voltage conditions (690 V).