## M3LT-R4/B Electronic Specifications The **M3LT-R4/B** is a specialized electronic component, typically categorized as a **Medium Power, High-Frequency Multi-Layer RF Transformer** or an **Impedance Matching Balun** used in telecommunications and signal processing. Below is the detailed breakdown of its electronic parts and characteristics. ### 1. Key Technical Specifications The performance of the M3LT-R4/B is defined by its ability to manage signal integrity across specific frequency bands. | Parameter | Typical Value / Range | | :--- | :--- | | **Impedance Ratio** | 1:4 (Standard for R4 variants) | | **Frequency Range** | 5 MHz to 1000 MHz (Broadband) | | **Insertion Loss** | 0.5 dB to 1.5 dB | | **Power Rating** | 0.25W to 0.5W | | **Configuration** | Balanced to Unbalanced (Balun) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Physical Composition The device is constructed using multi-layer ceramic technology to minimize parasitic capacitance. * **Core Material:** High-permeability Ferrite. This allows for high efficiency and a compact footprint. * **Winding Type:** Usually a transmission line transformer configuration using precision-aligned copper traces. * **Termination:** Lead-free (RoHS compliant) tin-plated terminations for reliable soldering. * **Package Type:** Case Style "B" (indicating specific dimensions, often approx. 0.15" x 0.15"). --- ### 3. Functional Pinout Configuration While specific layouts can vary by manufacturer (such as Mini-Circuits or Macom), the standard R4/B configuration follows this logic: | Pin Number | Function | Description | | :--- | :--- | :--- | | **Pin 1** | Secondary (Dot) | Output / Balanced port | | **Pin 2** | Secondary (NC/GND) | Center tap or Ground reference | | **Pin 3** | Secondary | Output / Balanced port | | **Pin 4** | Primary | Input / Unbalanced port | | **Pin 6** | Primary (Dot) | Input / Unbalanced port | --- ### 4. Application Areas The M3LT-R4/B is primarily used in circuits requiring precise impedance conversion: 1. **Push-Pull Amplifiers:** To combine signals from two transistors. 2. **CATV Equipment:** Distributing signals across cable networks while maintaining 75-ohm integrity. 3. **Mixers & Modulators:** Providing the necessary phase shift for signal processing. 4. **Antenna Interfacing:** Matching a low-impedance feedline to a higher-impedance antenna element. ---