The **UT2955G-AA3-R** is a high-performance, P-channel enhancement mode Power MOSFET manufactured by Unisonic Technologies (UTC). It is commonly used for power management and switching applications where low on-resistance and efficient thermal dissipation are required. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the UT2955G-AA3-R: | Parameter | Symbol | Typical Value | | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DSS}$ | -60 V | | **Gate-Source Voltage** | $V_{GSS}$ | ±20 V | | **Continuous Drain Current** | $I_D$ | -0.12 A (at 25°C) | | **Static Drain-Source On-Resistance** | $R_{DS(ON)}$ | 6.0 Ω (Typ) @ $V_{GS}$ = -10V | | **Package Type** | SOT-223 | Surface Mount | | **Configuration** | Single | P-Channel | --- ### 2. Breakdown of the Part Number To understand the specific variant of this component, we can decode the suffix: * **UT2955**: The base model series (P-Channel MOSFET). * **G**: Stands for "Halogen Free" and "RoHS Compliant" (Green product). * **AA3**: Indicates the **SOT-223** package type. * **R**: Indicates the packaging method (**Tape and Reel**). --- ### 3. Features and Applications The UT2955G is designed with high cell density technology to minimize on-state resistance. #### Key Features: * **Low Drive Current:** High-speed switching capabilities. * **Low $R_{DS(ON)}$:** Reduces power loss during conduction. * **Thermal Stability:** The SOT-223 package provides a good balance between size and heat dissipation. #### Typical Applications: * **Power Management:** Used in DC-DC converters and load switches. * **Motor Control:** Small DC motor drive circuits. * **Battery Protection:** Circuits requiring reverse polarity protection or high-side switching. --- ### 4. Typical Application Circuit (High-Side Switch) In a P-channel MOSFET application, the Source is usually connected to the positive supply. ```markdown [Input Voltage Vcc] ---- (Source) | [UT2955G MOSFET] ---- (Gate) <--- [Control Signal] | [Load] ----------------- (Drain) | [GND] ``` ---