Siemens 4EP3700-5US Transformer

Siemens 4EP3700-5US00 is a three‑phase line reactor (inductor) designed for use with Siemens ECO1 inverter drives, providing a controlled impedance on the input side to improve power quality and protect drive electronics. It is specified for a 480V, three‑phase supply at 60 Hz and a current rating up to 40 A, making it suitable for smoothing current draw and mitigating transient effects in 3‑phase motor drive applications. The unit’s form factor measures 159 mm (H) × 178 mm (W) × 73 mm (D) and it weighs 3.8 kg, with Siemens documentation noting that 4EP3700‑5US00 is also cataloged as 4EP3700‑1US in some references. This model is part of the 4EP3700 series of line reactors used with the ECO1 inverter family, commonly deployed in industrial control panels to reduce input harmonic content and provide surge protection for 480V systems. Typical applications include drives and other ECO1 configurations that require a dedicated input line reactor to stabilize power delivery and enhance drive performance in commercial and industrial environments.