Arcade machines represent significant investments for both collectors and businesses, making robust surge protection critical for their longevity. The most common protection types begin with Metal Oxide Varistors (MOVs), which are fundamental components in most surge protectors. These devices clamp excessive voltage by diverting surge current away from sensitive circuitry. Another prevalent method involves EMI/RFI filtering, which suppresses high-frequency noise that can degrade machine performance over time. Many operators utilize dedicated AC power conditioners that combine voltage regulation with advanced surge suppression, creating a stable power environment. Transient Voltage Suppression (TVS) diodes offer fast response times for protecting specific ICs on internal boards. For comprehensive protection, industrial-grade uninterruptible power supplies (UPS) provide battery backup during outages while filtering incoming power. Proper grounding remains the foundational element, ensuring surges have a safe path to earth. Operators often implement a layered approach, starting with a whole-building surge arrestor, followed by point-of-use protectors specifically designed for high-draw arcade equipment. Regular testing and replacement of surge protection devices is crucial, as MOVs degrade with each surge event. Understanding these common protection methods helps preserve both the electronic components and the nostalgic value of these classic gaming machines.