The **8502SCO2V03S_V01** is a specific part number belonging to the **Square D (by Schneider Electric) Type S** series of NEMA magnetic contactors. These are heavy-duty industrial components used primarily for switching power to electric motors or resistive loads. ### Technical Specifications Breakdown The alphanumeric code provides specific details about the internal electronic and mechanical configuration: | Feature | Specification | Description | | :--- | :--- | :--- | | **Series** | 8502 | NEMA Magnetic Contactor (Non-reversing) | | **Type** | SC | Size 1 Contactor (Standard duty) | | **Configuration** | O | Open Type (No enclosure, intended for panel mounting) | | **Pole Configuration** | 2 | 2-Pole (Typically for single-phase or specific DC loads) | | **Voltage Code** | V03 | 240V AC Coil @ 60Hz / 220V AC Coil @ 50Hz | | **Special Modification** | S | Separate Control Circuit (External power for the coil) | | **Sub-Designation** | V01 | Factory customization (often regarding auxiliary contacts) | --- ### Key Electronic & Mechanical Components 1. **Electromagnetic Coil (V03):** * This is the heart of the device. When 240V AC is applied to the coil, it creates a magnetic field that pulls the movable armature toward the stationary core. * The "S" designation means the coil terminals are wired to be powered by a separate source rather than being tapped directly from the main power lines. 2. **Power Contacts:** * Silver Cadmium Oxide contacts designed to resist welding and pitting under high-current arcs. * **NEMA Size 1 Rating:** Capable of handling up to 27 Amps (continuous) or roughly 2-3 HP at 230V for motor loads. 3. **Stationary & Movable Armature:** * A laminated steel core designed to reduce eddy current losses. * Includes a "shading coil" (a small copper ring) to prevent "chatter" (vibrations) by maintaining a magnetic hold during the zero-crossing of the AC cycle. 4. **Auxiliary Contacts (V01 Designation):** * These are smaller contacts used for logic signaling (e.g., turning on an indicator light or signaling a PLC that the contactor is closed). * The `V01` typically indicates a specific arrangement of Normally Open (NO) or Normally Closed (NC) auxiliary blocks pre-installed at the factory. --- ### Connection Diagram Overview | Terminal | Function | Description | | :--- | :--- | :--- | | **L1, L2** | Line Inputs | Incoming main power supply. | | **T1, T2** | Load Outputs | Connection to the motor or heater. | | **A1, A2** | Coil Terminals | Where the 240V control voltage is applied. | ---