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It can cut the time your compressor spends on high-amp startup by 30% to 50%.

By reducing heat build-up and electrical stress, it protects expensive internal components from "hard starts".

Uses a multi-layer starting capacitor and a smart switch to provide a timed "boost". Installation Basics

The "5-2-1" name refers to the three wires——that must be connected to the compressor.

Designed for units ranging from 3.5 to 5 tons. Voltage: Standard 208/240v systems.