The **8502SDO2V02S_V01** is a specific part number typically associated with **Schneider Electric (Square D)** NEMA-rated magnetic contactors. This device is an electromechanical switch used primarily for controlling electric motors or large power loads. --- ### 1. Technical Specifications Overview Below are the primary electrical and physical characteristics of this specific configuration: | Feature | Specification | | :--- | :--- | | **Product Type** | NEMA Magnetic Contactor | | **NEMA Size** | Size 2 (High current capacity) | | **Ampere Rating** | 45 Amperes | | **Number of Poles** | 3-Pole (3-Phase switching) | | **Coil Voltage** | 110V AC @ 50Hz / 120V AC @ 60Hz | | **Enclosure Type** | Open (No external box/housing) | | **Form Factor** | Non-Reversing | --- ### 2. Breakdown of the Part Number The alphanumeric string describes the exact build of the component: * **8502**: Indicates the Series (Type S Magnetic Contactor). * **S**: Designates the physical frame size (NEMA Size 2). * **D**: Refers to the "Open" construction (designed for mounting inside a control panel). * **O2**: Represents the number of power poles (3 poles in this specific sub-series context). * **V02S**: Defines the **Control Coil** specifications (120V AC) and often denotes a specific revision or factory-installed accessory (like a separate control circuit fuse). * **_V01**: Typically indicates a specific customer-specific wiring configuration or a minor engineering versioning from the manufacturer. --- ### 3. Key Electronic Components The device operates using several critical internal parts: 1. **Electromagnetic Coil:** When energized with 120V AC, it creates a magnetic field that pulls the armature down to close the electrical contacts. 2. **Power Contacts:** Silver-cadmium oxide alloy contacts designed to resist welding and pitting under high-current motor startup loads. 3. **Return Spring:** Ensures that once power is removed from the coil, the contacts snap open immediately to kill the circuit. 4. **Arc Chutes:** Specialized structures surrounding the contacts that help extinguish the electrical arc generated when the circuit is broken under load. --- ### 4. Application Use-Case This contactor is commonly used in industrial environments for: * **Motor Control:** Starting and stopping 3-phase motors up to 15HP (at 230V) or 25HP (at 460V/575V). * **Heating Loads:** Controlling large industrial resistive heaters. * **Lighting Banks:** Switching high-density discharge (HID) or LED lighting arrays in factories. ---