1pcs ATS 125A 4P Automatic Transfer Switch Genset Accessories Control Board Circuit Breaker Single and Three Phase Overview This 125A 4P automatic transfer switch combines switching, control board functions, and circuit breaker protection in a single unit. It is designed for use with generator sets and backup power systems to automate transfer between mains and generator power while protecting connected equipment. Key benefits Automatic switching to reduce downtime: switches power sources without manual intervention to maintain continuous supply during mains failure. Integrated control and protection: builtin control board and circuit breaker simplify installation and reduce the need for separate components. Broad compatibility: suitable for single phase and three phase systems and standard genset accessory applications. Clear rating and configuration: 125A rated current and four pole design provide a defined specification for replacement or system design. Practical replacement part: supplied as 1 piece for straightforward swapin when servicing or upgrading transfer switch assemblies. Main features Rated current: 125A for consistent handling of mediumload circuits. Pole count: 4P four pole configuration for comprehensive phase and neutral control. Function: automatic transfer switch for seamless changeover between utility and generator power. Integrated elements: control board functionality combined with circuit breaker protection in one unit. Quantity: 1 piece included. Performance and construction Designed for reliable automatic operation under typical genset and backup power conditions. Robust construction for routine use in power switching applications. Intended for installation and commissioning by qualified electrical technicians to ensure correct wiring and safe operation. Compatibility and applications Compatible with generator sets and backup power panels where a 125A 4P ATS is required. Can be used as a direct replacement in existing transfer switch assemblies matching the same electrical specifications. Typical use scenarios Residential standby power: automates transfer to a home generator during utility outages to maintain lighting, refrigeration, and essential circuits. Small commercial or office backup: integrates with building gensets to protect point of systems, network equipment, and lighting from interruptions. Light industrial or facility equipment: provides automatic source transfer for pumps, HVAC units, or workshop machinery where controlled switchover and circuit protection are needed. Installation notes Verify electrical compatibility with your system including phase configuration, neutral handling, and the 125A rating before installation. Installation and wiring should be performed by a qualified electrician in accordance with local electrical codes and regulations. Choose this 1pcs ATS 125A 4P automatic transfer switch when you need a compact, rated 125A four pole unit that combines transfer switching, control board functions, and circuit breaker protection for single and three phase genset applications.