Siemens 3RT2028-1AK60 3-Phase Magnetic Contactor

Siemens 3RT2028-1AK60 is a three-pole SIRIUS magnetic contactor engineered for AC-3 duty with a 38 A continuous current rating and a 120 V AC control coil (60 Hz). It includes a single Form C auxiliary contact (1 CO) for feedback or interlock functions, while the main contacts are rated to switch up to 600 V AC. In practical terms, the device handles roughly 10 HP at 230 V and 25 HP at 460–575 V, with Ie rated at AC-3, 400 V of 38 A, making it a robust choice for starting and stopping mid-size three-phase motors in pumps, fans, conveyors, and other industrial machinery. As part of Siemens' 3RT2 Sirius family, this unit is designed to integrate with standard overload relays and control circuits to form compact motor-start assemblies that align with common panel designs.