The **47LPQ-41G-R** is a specific part number belonging to a series of high-performance Ethernet magnetic modules (Transformers), typically manufactured by companies like **Bothhand USA** or **Pulse Electronics** (depending on the specific sourcing brand). It is primarily used in networking hardware to provide signal conditioning and electrical isolation. --- ## 1. Technical Specifications The "LPQ" designation often refers to a "Low Profile Quad" configuration, meaning it contains four channels (ports) in a space-saving package. | Feature | Specification | | :--- | :--- | | **Component Type** | LAN Magnetic Transformer Module | | **Interface** | 10/100/1000 Base-T (Gigabit Ethernet) | | **Number of Ports** | Quad (4-Port) | | **Package Type** | Surface Mount (SMT/SMD) | | **Isolation Voltage** | 1500 Vrms (Minimum) | | **Configuration** | Low Profile | | **Compliance** | RoHS Compliant (indicated by the "-R" suffix) | --- ## 2. Key Internal Components The 47LPQ-41G-R is not a single electronic part but an integrated module containing several passive components: 1. **Isolation Transformers:** These use magnetic induction to transfer Ethernet signals across a barrier while blocking DC voltages and protecting equipment from ground loops or surges. 2. **Common Mode Chokes (CMC):** These are included to suppress Electromagnetic Interference (EMI) and ensure the device meets EMC regulatory standards. 3. **Termination Resistors/Capacitors:** Often integrated internally (sometimes referred to as "Bob Smith Termination") to improve signal integrity and reduce noise on unused wire pairs. --- ## 3. Typical Pinout and Circuitry In a standard Gigabit application, each of the four ports will have pins corresponding to the four differential pairs required for 1000Base-T: * **TRD0±, TRD1±, TRD2±, TRD3±:** Differential transmit/receive pairs. * **Center Taps (CT):** Usually connected to a filtered voltage source or decoupled to ground via a capacitor to provide a return path for common-mode noise. --- ## 4. Application Use Cases This part is commonly found in high-density networking equipment where PCB real estate is limited. * **Network Switches:** Managed and unmanaged multi-port switches. * **Routers:** Enterprise-grade gateways. * **Hubs:** Multi-port connectivity devices. * **Embedded Systems:** Industrial motherboards with multiple Ethernet outputs. --- ## 5. Part Number Breakdown (Generic) | Segment | Meaning | | :--- | :--- | | **47** | Series Identifier (Gigabit LAN) | | **LPQ** | Low Profile Quad (Physical form factor) | | **41** | Internal circuit schematic/winding ratio code | | **G** | Gigabit (10/100/1000 Mbps) | | **R** | RoHS Compliant / Lead-Free |