: A Negative Temperature Coefficient (NTC) thermistor sits in series with the line to suppress heavy current spikes when the bulk capacitors charge during initial startup.

Unlike modern units that use a dedicated auxiliary chip, the S-360-12 often utilizes a self-oscillating starting design Startup Mechanism

Understanding its internal circuit design, components, and layout is essential for engineers, hobbyists, and repair technicians looking to deploy, troubleshoot, or repair this powerhouse utility. Core Technical Specifications