## PUMX1-AL6-R: Technical Overview The **PUMX1-AL6-R** is a specific electronic component, typically categorized as a **dual NPN general-purpose transistor** housed in a small surface-mount package. It is designed for switching and amplification applications where board space is at a premium. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the PUMX1 series: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Collector-Base Voltage** | $V_{CBO}$ | 50 | V | | **Collector-Emitter Voltage** | $V_{CEO}$ | 40 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | 5 | V | | **Collector Current (DC)** | $I_C$ | 100 | mA | | **Total Power Dissipation** | $P_{tot}$ | 300 | mW | | **DC Current Gain** | $h_{FE}$ | 120 - 450 | - | | **Package Type** | SOT-363 | (SC-88) | - | --- ### 2. Internal Configuration The "X1" designation in the PUM series usually indicates a **dual transistor** setup. Inside a single SOT-363 package, there are two identical NPN silicon transistors. * **Pinout Layout:** * **Pin 1:** Emitter 1 * **Pin 2:** Base 1 * **Pin 3:** Collector 2 * **Pin 4:** Emitter 2 * **Pin 5:** Base 2 * **Pin 6:** Collector 1 --- ### 3. Features & Applications The PUMX1-AL6-R is favored in modern electronics for several reasons: * **Space Efficiency:** By integrating two transistors into one SOT-363 footprint, it reduces component count and PCB size. * **Low Capacitance:** Suitable for high-frequency switching tasks. * **Applications:** * General-purpose switching and amplification. * Signal logic level shifting. * Driver circuits for small LEDs or relays. * Portable electronic devices (smartphones, tablets). --- ### 4. Part Number Breakdown (Typical) While naming conventions can vary slightly by manufacturer (e.g., NXP/Nexperia or Rohm), the suffix usually denotes packaging: * **PUMX1:** The core device family (Dual NPN). * **AL6:** Often refers to a specific gain grade or manufacturer-specific internal code. * **-R:** Generally indicates **Tape and Reel** packaging for automated assembly. ---