The **8502SDO2V07** is a specific model of a **NEMA Magnetic Contactor** manufactured by Schneider Electric (Square D). It is primarily used in industrial applications to switch electrical power circuits on and off, typically for motor control or large lighting loads. --- ### 1. Component Specifications Below are the primary electrical and physical specifications for this component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | Schneider Electric (Square D) | | **Series** | 8502 (Type S) | | **NEMA Size** | Size 2 | | **Pole Configuration** | 3-Pole (3P) | | **Continuous Current Rating** | 45 Amperes | | **Control Voltage (Coil)** | 550V AC @ 50Hz / 600V AC @ 60Hz | | **Enclosure Type** | Open (No NEMA 1/3R/12 housing provided) | | **Phase** | 3-Phase | --- ### 2. Breakdown of the Model Number The model number follows a specific nomenclature that defines its electronic and mechanical parts: * **8502**: Designates a NEMA-rated magnetic contactor (non-reversing). * **S**: Indicates the "Type S" design, which is a modular, robust industrial construction. * **D**: Represents the physical size (Size 2). * **O**: Signifies the enclosure type ("Open" - meant to be mounted inside a larger control panel). * **2**: Confirms the number of poles (this can vary, but in the standard D2 configuration, it identifies the frame). * **V07**: This is the **Voltage Code** for the internal electromagnetic coil. `V07` specifically refers to **600V AC at 60Hz**. --- ### 3. Key Electronic/Internal Parts #### A. The Electromagnetic Coil (V07) The "heart" of the contactor. When 600V is applied to the coil terminals (A1/A2), it creates a magnetic field that pulls the armature down, closing the high-power contacts. #### B. Power Contacts The Size 2 contacts are made of silver-cadmium oxide alloy. This material is designed to resist welding and arc erosion when switching high-current loads (up to 45A). #### C. Arc Chutes The assembly includes molded structures that surround the contacts to quench the electrical arc generated when the circuit is opened under load. #### D. Auxiliary Contact (Optional/Add-on) While the base unit is a power contactor, it is often fitted with side-mounted or top-mounted auxiliary contacts used for "holding" circuits or signaling a PLC (Programmable Logic Controller). --- ### 4. Typical Applications * **Motor Control:** Starting and stopping 3-phase motors up to 25 HP at 460/575V. * **Heating Loads:** Switching resistive heating elements in industrial furnaces. * **Lighting:** Controlling large banks of high-intensity discharge (HID) lighting.