The part number **51U-4F2-R2** typically refers to a specialized **Power Distribution Unit (PDU)** or a **Power Strip** component often used in industrial racks, telecommunications, or server environments. Specifically, it is frequently associated with brands like **Quest Manufacturing** or similar electronic hardware providers. Below is a breakdown of the electronic and mechanical specifications for this component: ### 1. Key Technical Specifications The "51U" series generally follows a standard configuration for rack-mount power solutions. | Feature | Specification | | :--- | :--- | | **Form Factor** | 1U Rackmount (Horizontal) | | **Total Outlets** | 4 Outlets (Front-facing) | | **Current Rating** | 15 Amps | | **Voltage** | 125V AC | | **Plug Type** | NEMA 5-15P (Standard 3-prong) | | **Circuit Protection** | Integrated Reset Switch / Circuit Breaker | | **Material** | Heavy-duty Steel/Aluminum Housing | --- ### 2. Component Breakdown #### A. Power Outlets (NEMA 5-15R) The unit features four NEMA 5-15R receptacles. The "4F" in the part number usually signifies **4** outlets on the **F**ront of the unit. This is ideal for quick-access patching where devices are swapped frequently. #### B. Overload Protection The "R2" suffix often denotes a revision or a specific protection feature, such as: * **Circuit Breaker:** A built-in 15A breaker to prevent over-current from damaging connected equipment. * **Surge Suppression:** Basic protection against voltage spikes (though specific Joule ratings vary by sub-model). #### C. Physical Housing Designed for a standard 19-inch EIA rack. The housing is typically finished in a black powder coat to provide durability and electrical grounding safety. --- ### 3. Common Applications * **Networking Closets:** Powering switches, routers, and modems. * **Audio/Visual Racks:** Providing front-facing power for portable equipment or mixers. * **Laboratory Benches:** Used in test environments where easy access to power is required at the front of a workbench rack. --- ### 4. Wiring and Safety Standards * **Grounding:** The unit features a dedicated grounding wire/path to the chassis to ensure user safety. * **Compliance:** Most units in this series are **UL (Underwriters Laboratories)** listed, ensuring they meet rigorous fire and electrical safety standards.