The APM-20 automatic phase switch by zaMel is designed for reliable power management in residential and DIY applications. This device automatically monitors electrical phases and switches between available power sources to maintain continuous operation of connected equipment during phase failures or voltage fluctuations. Constructed with durable components for long-term reliability, the APM-20 features a compact design measuring approximately 20 cm wide, 15 cm high, and 10 cm deep, with a weight of approximately 2.5 kg. It operates within a temperature range of -10°C to 40°C and handles voltage inputs up to 400 V AC with a maximum current capacity of 20 A. The unit includes clear status indicators for phase monitoring and automatic switching functions, along with manual override capability for maintenance situations. Installation is straightforward with standard DIN rail mounting, making it suitable for integration into existing electrical panels. The robust housing provides protection against dust and minor moisture exposure, ensuring consistent performance in various home workshop and utility environments. This phase switch is particularly useful for maintaining power to essential appliances, workshop tools, or heating systems during temporary power disruptions. Its automatic operation eliminates the need for manual intervention during phase changes, providing convenience and reducing the risk of equipment damage from sudden power loss. The device complies with standard electrical safety regulations for residential installations and features thermal protection to prevent overheating during extended use. With its focus on practical functionality and reliable performance, the APM-20 automatic phase switch offers a practical solution for homeowners and DIY enthusiasts seeking to enhance power stability in their electrical systems.