GE CR-306D0-LTH Contactor

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                                                                              • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • GE CR-306D0-LTH Contactor (General Electric NEMA Magnetic Motor Starter / Contactor)

                                                                                                                                                            

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                            The GE CR-306D0-LTH is a NEMA-rated magnetic motor starter (contactor assembly) used for switching and protecting AC motors in industrial control systems.

                                                                                                                                                          • Product Information

                                                                                                                                                            • Brand: General Electric (GE)
                                                                                                                                                            • Series: CR306
                                                                                                                                                            • Model: CR306D0-LTH
                                                                                                                                                            • Type: Magnetic motor starter / power contactor
                                                                                                                                                            • NEMA size: Size 2
                                                                                                                                                            • Rated current: ~45A class
                                                                                                                                                            • Max voltage: up to 600 VAC
                                                                                                                                                            • Coil voltage: 120 VAC control coil (typical LTH configuration)
                                                                                                                                                            • Function: Motor switching + overload protection (starter assembly dependent)

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                                                                                                                                                            What it actually is

                                                                                                                                                            This device is used to turn industrial motors ON/OFF safely, meaning:

                                                                                                                                                            • Energizes coil → contact closes → motor runs
                                                                                                                                                            • Coil de-energizes → contact opens → motor stops
                                                                                                                                                            • Often paired with overload relay for motor protection

                                                                                                                                                            It is a basic but critical electromechanical switching device.

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                                                                                                                                                            System Role (Simple)

                                                                                                                                                            Control signal (PLC / push button / relay)
                                                                                                                                                            → GE CR306 contactor coil (this unit)
                                                                                                                                                            → high-power contacts switch
                                                                                                                                                            → motor ON/OFF
                                                                                                                                                            → overload protection (if installed)

                                                                                                                                                            So it acts like a “high-power electrical switch for motors.”

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                                                                                                                                                            Key Features

                                                                                                                                                            • Electromagnetic coil-driven switching
                                                                                                                                                            • Designed for 3-phase AC motor control
                                                                                                                                                            • Heavy-duty industrial contacts
                                                                                                                                                            • Arc-resistant contact structure
                                                                                                                                                            • Long mechanical/electrical endurance cycle
                                                                                                                                                            • NEMA industrial standard construction

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                                                                                                                                                            Typical Applications

                                                                                                                                                            • Motor control centers (MCC)
                                                                                                                                                            • Pumps and compressors
                                                                                                                                                            • HVAC systems
                                                                                                                                                            • Conveyor systems
                                                                                                                                                            • Industrial machinery
                                                                                                                                                            • General factory automation motor switching

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                                                                                                                                                            Advantages

                                                                                                                                                            • Reliable high-current switching
                                                                                                                                                            • Simple and robust electromechanical design
                                                                                                                                                            • Easy integration into control panels
                                                                                                                                                            • Industry-standard replacement availability
                                                                                                                                                            • Suitable for continuous industrial operation

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                                                                                                                                                            Important Notes

                                                                                                                                                            • Not PLC ❌
                                                                                                                                                            • Not electronic controller ❌
                                                                                                                                                            • Not I/O module ❌
                                                                                                                                                            • Not communication device ❌
                                                                                                                                                            • It is a motor power switching contactor (electromechanical starter component) ✔

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                                                                                                                                                            Precautions

                                                                                                                                                            • Coil voltage must match control circuit (commonly 120VAC)
                                                                                                                                                            • Contacts wear over time due to arcing
                                                                                                                                                            • Must be used with proper overload protection for motors
                                                                                                                                                            • Incorrect wiring can cause coil burn or contact welding
                                                                                                                                                            • High voltage hazard — installation only by qualified personnel 

The structure and details of the product：