The **75N75-TA3-R** is a specific part number for a high-power N-Channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor). It is widely used in power switching applications due to its high current handling and low on-resistance. ### 1. General Specifications The "75N75" nomenclature typically indicates its core ratings: **75 Volts** and **75 Amperes**. | Parameter | Value | Description | | :--- | :--- | :--- | | **Drain-Source Voltage ($V_{DSS}$)** | 75V | The maximum voltage the transistor can handle across its drain and source. | | **Continuous Drain Current ($I_D$)** | 75A | The maximum current it can carry continuously at room temperature ($25^\circ C$). | | **On-Resistance ($R_{DS(on)}$)** | ~11m$\Omega$ | The resistance between drain and source when fully turned on (lower is better for efficiency). | | **Package Type** | TO-220 | A common through-hole package designed for easy heatsink mounting. | | **Gate-Source Voltage ($V_{GS}$)** | $\pm$20V | The maximum voltage allowed on the control pin. | --- ### 2. Breakdown of the Part Number (UTC Standard) This part is often manufactured by **Unisonic Technologies (UTC)**. The suffix provides detail on the physical packaging and material: * **75N75**: The base model (75V, 75A). * **TA3**: Refers to the **TO-220** package style. * **R**: Usually denotes **RoHS compliance** (Lead-free/Green material). --- ### 3. Pin Configuration The TO-220 package has three pins, viewed from the front (label side) with pins pointing down: 1. **Gate (G)**: The "Switch" input. Applying voltage here allows current to flow. 2. **Drain (D)**: Connected to the load (and the metal tab on the back). 3. **Source (S)**: Connected to the ground or negative side of the circuit. --- ### 4. Typical Applications Because of its high current capacity and durability, the 75N75-TA3-R is found in: * **Motor Controllers**: PWM speed control for DC motors. * **Inverters**: Converting DC battery power to AC. * **Uninterruptible Power Supplies (UPS)**: Switching power sources during outages. * **DC-DC Converters**: High-efficiency voltage regulation. --- ### 5. Key Features * **Fast Switching**: Capable of high-frequency operation. * **Low Thermal Resistance**: Efficiently transfers heat to a heatsink. * **Avalanche Rated**: Can handle brief voltage spikes without immediate failure.