Tronic Automatic Transfer Switch 1250A

Our review

This is a Tronic automatic transfer switch rated at 1250A, built around a microprocessor that watches the incoming supply. When mains power is lost, or when a phase drifts into overvoltage or undervoltage, the controller triggers the transfer. That makes it a fit for larger installations where a generator or second source needs to take over without someone standing at a panel. Before buying, confirm the 1250A rating matches your load and that your switchgear, cabling and protection can carry it. Compare against contactor-based ATS units and against models with adjustable voltage thresholds, since the listing gives no settings detail.