The **OR2-3-R** is a specific part number typically associated with **Bussmann (by Eaton)** or similar manufacturers, representing a **3-Pole Open-Style Terminal Block or Power Distribution Block**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. General Specifications The OR2-3-R belongs to a series of power terminal blocks designed for industrial electrical panels. | Feature | Specification | |:---|:---| | **Part Number** | OR2-3-R | | **Poles** | 3-Pole (Triple Phase) | | **Material** | Thermoplastic Base / Tin-Plated Aluminum Connectors | | **Mounting Type** | Panel Mount (Screw-down) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### 2. Electrical Ratings These parts are engineered to handle high-current industrial loads. * **Current Rating:** Generally rated between **175A to 200A** (depending on the specific wire gauge used). * **Voltage Rating:** Rated for up to **600V AC/DC**. * **Short-Circuit Current Rating (SCCR):** Typically rated up to **10kA** (unmarked) or higher when paired with specific fuses. --- ### 3. Connection and Wiring The block features a "Box Lug" design to ensure secure mechanical connections for heavy-gauge wires. | Side | Wire Range (Typical) | Torque Requirements | |:---|:---|:---| | **Line (Input)** | 2/0 - #14 AWG (Al/Cu) | ~120 lb-in | | **Load (Output)** | 2/0 - #14 AWG (Al/Cu) | ~120 lb-in | --- ### 4. Key Physical Features * **Modular Design:** The 3-pole configuration allows for three-phase power distribution in a single footprint. * **Durability:** The base is made of high-impact, break-resistant thermoplastic. * **Dual-Rated:** The connectors are "AL9CU" rated, meaning they can safely accept both **Aluminum** and **Copper** conductors. * **Safety:** The "-R" suffix confirms compliance with RoHS (Restriction of Hazardous Substances) directives, ensuring no lead or mercury-based solders/platings are used. --- ### 5. Common Applications * **HVAC Systems:** Distributing power to compressors and fans. * **Industrial Control Panels:** Acting as a main power entry point. * **Motor Control Centers (MCC):** Splitting power to multiple motor starters. ---