The **8502SCO2V03** is a specific model of a NEMA-rated magnetic contactor manufactured by **Schneider Electric (Square D)**. These devices are industrial-grade switches used to control electrical power to a load, typically motors or heating elements. --- ### 1. Key Technical Specifications Below is a breakdown of the electronic and mechanical characteristics of this specific part: | Feature | Specification | | :--- | :--- | | **Product Type** | Non-Reversing Magnetic Contactor | | **NEMA Size** | Size 1 | | **Continuous Current Rating** | 27 Amperes | | **Number of Poles** | 3-Pole (3-Phase) | | **Control Circuit Voltage** | 240V AC @ 60 Hz / 220V AC @ 50 Hz | | **Enclosure Type** | Open (No metal box/cover included) | | **Horsepower Rating (230V)** | 7.5 HP | | **Horsepower Rating (460/575V)** | 10 HP | --- ### 2. Electronic Component Breakdown The 8502SCO2V03 consists of several critical sub-assemblies that work together: #### A. The Electromagnetic Coil (V03) The suffix **V03** denotes the voltage rating of the internal coil. * **Function:** When 240V AC is applied to the coil terminals, it creates a magnetic field. * **Operation:** This field pulls the armature down, closing the high-power contacts. #### B. Power Contacts * **Material:** Usually silver-cadmium oxide alloy to resist "welding" and arcing. * **Configuration:** 3 normally open (NO) poles designed to handle high-inrush currents from industrial motors. #### C. Arc Suppressors / Chutes * Located around the contacts to quickly extinguish the electrical arc formed when the contacts open or close under load, extending the lifespan of the device. --- ### 3. Wiring and Application Because this is an **8502** series device, it is a **contactor only**. It does not include integral overload protection (which would make it an 8536 series "starter"). * **Application:** Often used in HVAC systems, pump controls, and lighting circuits where a remote signal must switch a high-current load. * **Mounting:** Designed for panel mounting within a larger control cabinet. --- ### 4. Part Number Nomenclature Understanding the code helps in identifying replacement parts: * **8502:** Type (NEMA Contactor) * **S:** Model Series * **C:** NEMA Size 1 (27A) * **O:** Open Type (No enclosure) * **2:** 3-Pole configuration * **V03:** 240V AC 60Hz / 220V AC 50Hz Coil ---