The **8502SCO2V02SX01** is a specific model of a NEMA-rated magnetic contactor manufactured by Square D (Schneider Electric). It is primarily used for non-reversing motor control and switching resistive loads. Below is a breakdown of its electronic and mechanical components. --- ### 1. Technical Specifications This device is a **NEMA Size 1** magnetic contactor. | Component | Specification | | :--- | :--- | | **Manufacturer** | Square D (Schneider Electric) | | **Type** | Type S Magnetic Contactor | | **Poles** | 3-Pole (3-Phase) | | **Current Rating** | 27 Amperes | | **NEMA Size** | Size 1 | | **Enclosure Type** | Open (No outer box, meant for panel mounting) | | **Control Voltage** | 110V AC @ 50Hz / 120V AC @ 60Hz | --- ### 2. Breakdown of the Model Number (Suffixes) The specific suffixes in the model number indicate custom factory modifications: * **8502S**: The base series for NEMA magnetic contactors. * **CO2**: Indicates NEMA Size 1, 3-Pole configuration. * **V02**: Represents the **Coil Voltage**. V02 stands for a 120V AC, 60Hz coil. * **S**: Indicates a **Separate Control Circuit**. This means the coil power is wired independently from the line voltage (often used with a control transformer). * **X01**: Indicates a specific **Auxiliary Contact** configuration. In this case, it usually includes one normally closed (NC) internal auxiliary contact. --- ### 3. Key Electronic Components #### A. The Electromagnetic Coil (Solenoid) The "heart" of the contactor. When 120V AC is applied to terminals A1 and A2, it creates a magnetic field that pulls the armature down, closing the heavy-duty power contacts. #### B. Power Contacts These are silver-cadmium oxide alloy points designed to handle high-current arcs. In this 3-pole model, there are three sets of contacts to switch the three phases of industrial power. #### C. Auxiliary Contacts (X01) Low-current contacts used for signaling or logic. * **Purpose:** These are used to tell a PLC the contactor is active, to light up an indicator lamp, or to create an electrical interlock with another device. #### D. Arc Chutes The physical structure surrounding the contacts designed to dissipate the heat and "extinguish" the electrical arc that occurs when the contacts open under load. --- ### 4. Wiring Overview | Terminal Label | Function | | :--- | :--- | | **L1, L2, L3** | Incoming 3-Phase Power (Line) | | **T1, T2, T3** | Outgoing Power to Motor/Load (Load) | | **A1, A2** | Coil Control Terminals (120V AC) | | **13, 14 (or NC labels)** | Auxiliary Contact terminals for logic |