The part number **A-2004-3-4-LP-R** typically refers to a specific type of **Modular Jack (RJ-type connector)**, often manufactured by companies like Assmann WSW Components. This component is widely used in networking, telecommunications, and data transfer interfaces. --- ### 1. Part Number Breakdown While naming conventions can vary slightly by manufacturer, the alphanumeric string generally follows this logic: | Segment | Meaning | Description | | :--- | :--- | :--- | | **A-2004** | Series Base | Standard series for Modular Jacks (RJ Series). | | **3** | Number of Positions | Indicates the physical slots (e.g., 6 or 8 positions). | | **4** | Number of Contacts | Indicates the actual metal pins loaded (e.g., 4 contacts). | | **LP** | Low Profile | Designates a "Low Profile" physical height for space-saving on PCBs. | | **R** | RoHS / Packaging | Often signifies RoHS compliance or Reel packaging. | --- ### 2. Technical Specifications Below are the typical electronic and mechanical characteristics for this class of connector: | Feature | Specification | | :--- | :--- | | **Connector Type** | RJ11 / RJ12 / RJ45 (depending on exact position count) | | **Mounting Type** | Through-hole (THT) or Surface Mount (SMT) | | **Orientation** | Right Angle (Side Entry) | | **Contact Material** | Phosphor Bronze with Gold plating | | **Current Rating** | 1.5 Amps | | **Voltage Rating** | 125 V AC | | **Shielding** | Usually Unshielded (unless specified otherwise) | --- ### 3. Key Components & Materials 1. **Housing:** Usually made of high-temperature thermoplastic (UL94V-0 rated) to withstand soldering heat. 2. **Contacts:** Copper alloy base with gold plating over nickel. Gold is used to prevent oxidation and ensure a stable low-resistance connection. 3. **Mechanical Features:** Includes a "locking tab" mechanism to ensure the male plug stays securely in place. ### 4. Common Applications * **Telecommunications:** Landline telephone connections (RJ11/RJ12). * **Networking:** Modems, routers, and low-speed data interfaces. * **Industrial:** RS-232/RS-485 serial communication ports. * **Consumer Electronics:** Smart home hubs and security systems. ---