The **8502SHO2V02S** is a specific model of a NEMA-rated magnetic contactor manufactured by Square D (Schneider Electric). It is part of the Type S family, designed for controlling AC motors and power circuits. --- ### ## Technical Specifications Breakdown The part number encodes specific electrical and physical characteristics. Here is the breakdown of the electronic components and ratings: | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | 8502 | Non-reversing AC Magnetic Contactor | | **NEMA Size** | Size 0 | Rated for up to 18 Amps (Continuous) | | **Pole Configuration** | 3-Pole | Designed for 3-phase electrical systems | | **Enclosure Type** | Open (S) | No protective outer box; intended for panel mounting | | **Coil Voltage** | 110V/120V AC (V02) | 120VAC @ 60Hz or 110VAC @ 50Hz | | **Phase** | 3-Phase | Standard industrial motor control | | **Switching Type** | SHO | Separate control circuit (No fused control transformer) | --- ### ### Key Electronic Components #### 1. The Magnetic Coil (V02) The heart of the contactor is the electromagnetic coil. When 120V AC is applied to terminals A1 and A2, it creates a magnetic field that pulls the armature down, closing the high-power contacts. * **Inrush VA:** The power required to initially close the contacts. * **Sealed VA:** The lower power required to keep the contacts closed. #### 2. Power Contacts The device features three heavy-duty silver-cadmium oxide contacts. These are designed to resist "welding" and arcing when switching inductive motor loads. * **Max Voltage:** 600V AC. * **Horsepower Ratings:** * 3 HP @ 200/230V AC. * 5 HP @ 460/575V AC. #### 3. Auxiliary Contacts The "S" suffix often indicates the inclusion of or compatibility with specific auxiliary contact blocks. These are low-power switches used for logic feedback (e.g., telling a PLC that the motor is running) or for interlocking circuits. --- ### ### Physical Installation & Application * **Mounting:** Designed for 35mm DIN rail or direct screw mounting onto a backplane. * **Wiring:** Uses pressure wire connectors (lugs) suitable for copper wire. * **Typical Use:** Used in HVAC systems, pump control, and industrial conveyor belts where rugged, NEMA-rated reliability is required over standard IEC contactors. ---