The **75N75-TM3-R** is a specific part number for an N-Channel enhancement mode Power MOSFET, commonly manufactured by companies like UTC (Unisonic Technologies). It is designed for high-current, high-speed switching applications. --- ### ## 1. Technical Specifications The part number follows a standard naming convention where "75N75" usually indicates its primary voltage and current ratings. | Parameter | Specification | Description | | :--- | :--- | :--- | | **Drain-Source Voltage ($V_{DSS}$)** | 75V | Maximum voltage across drain and source. | | **Continuous Drain Current ($I_D$)** | 75A | Maximum current the device can handle (at 25°C). | | **RDS(on)** | ~11m$\Omega$ | Resistance when the gate is fully "ON". | | **Package Type** | TO-251 (TM3) | Through-hole compact package. | | **Gate-Source Voltage ($V_{GS}$)** | $\pm$20V | Max voltage allowed on the Gate. | | **Polarity** | N-Channel | Requires positive voltage on the gate to conduct. | --- ### ## 2. Part Number Breakdown (Suffixes) The suffix codes determine the physical packaging and environmental standards: * **75N75**: The base model (75 Amps / 75 Volts). * **TM3**: Indicates the **TO-251** package (also known as I-PAK). It is similar to a TO-220 but smaller and designed for compact through-hole mounting. * **-R**: Typically stands for **RoHS compliant** or **Tape & Reel** (though -R in UTC nomenclature often signifies Lead-Free/Halogen-Free). --- ### ## 3. Key Features 1. **Low RDS(on)**: Minimizes power loss during conduction, reducing heat generation. 2. **Fast Switching**: High-speed response suitable for PWM (Pulse Width Modulation) circuits. 3. **High Avalanche Energy**: Capable of handling inductive spikes or "kickback" from motors and transformers. 4. **Ruggedness**: Designed to withstand harsh electrical environments in industrial applications. --- ### ## 4. Common Applications Due to its high current capacity and 75V rating, the 75N75-TM3-R is found in: * **Motor Controllers**: Used in E-bikes, scooters, and DC motor drivers. * **DC-DC Converters**: Step-up or step-down power modules. * **UPS Systems**: Uninterruptible power supplies for battery-to-AC conversion. * **Solonoid/Relay Drivers**: High-speed switching of inductive loads. --- ### ## 5. Pin Configuration (TO-251) Looking at the front of the component (legs pointing down): 1. **Gate (G)**: Controls the switching of the MOSFET. 2. **Drain (D)**: Connected to the load (and the metal tab). 3. **Source (S)**: Connected to the ground or negative supply.