The part number **8736SDO2V02H30S** refers to a specific configuration of a **Schneider Electric (Square D)** NEMA Reversing Magnetic Starter. These are heavy-duty industrial components used to control the direction and operation of three-phase electric motors. --- ### Part Number Breakdown | Segment | Meaning | Specification | | :--- | :--- | :--- | | **8736** | Class Number | NEMA Reversing Magnetic Starter (Type S) | | **S** | NEMA Size | Size 2 (Handles up to 45A, 25HP @ 460V) | | **D** | Enclosure Type | NEMA 1 (General purpose indoor surface mount) | | **O** | Design Code | Open Type (often indicates internal configuration) | | **2** | Number of Poles | 3-Pole (standard for 3-phase systems) | | **V02** | Control Voltage | 120V AC @ 60Hz / 110V AC @ 50Hz coil | | **H30S** | Overload Relay | Motor Logic™ Solid-State Overload Relay (Class 10/20) | --- ### Key Technical Specifications #### 1. Reversing Capability The unit consists of two contactors mechanically and electrically interlocked. This allows the motor to run in both **Forward** and **Reverse** directions by swapping two phases of the incoming power, while preventing both contactors from closing simultaneously (which would cause a short circuit). #### 2. Solid-State Overload Protection (H30S) Unlike traditional thermal melting alloy heaters, the **H30S** designation indicates a **Motor Logic™** solid-state overload relay. * **Adjustable Trip Class:** Typically supports Class 10 and Class 20. * **Phase Loss Protection:** Automatically trips if one of the three phases is lost. * **Wide Current Range:** Allows for fine-tuning the trip current to match the specific motor Nameplate FLA (Full Load Amps). #### 3. Power Ratings (NEMA Size 2) | Voltage | Max Horsepower (HP) | | :--- | :--- | | 200 - 230V AC | 15 HP | | 460 - 575V AC | 25 HP | --- ### Electronic & Physical Features * **Coil (V02):** The electromagnetic coil requires a 120V AC signal to pull the contacts closed. This is often provided via a control transformer or a separate control circuit. * **Auxiliary Contacts:** Usually equipped with one normally open (N.O.) holding circuit contact per contactor. * **Durability:** Designed for high-cycle applications (millions of operations) and harsh industrial environments. ---