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Discrete Semiconductors

Browse Discrete Semiconductors electronic components from listed manufacturers.

Subcategories

Diodes & Rectifiers→Thyristors→Transistors→

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onsemi 1N4148 Standard Diode 100V 200mA DO-35
onsemi 1N4148 Standard Diode 100V 200mA DO-35

Single Diodes

Fast Switching Speed Features a 4 ns reverse recovery time , making it suitable for high-speed signal switching and pulse applications. 100 V / 200 mA Performance Offers 100 V repetitive reverse voltage and 200 mA average rectified forward current for reliable small-signal and general-purpose circuit use. DO-35 Through-Hole Package Comes in a DO-35 axial through-hole package , ideal for traditional PCB assembly, prototyping, and maintenance applications.

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Discrete semiconductors are standalone electronic parts performing single functions, including diodes, transistors (BJT, FET, MOSFET), thyristors, and rectifiers. Unlike integrated circuits (ICs), they handle specific tasks like amplification, switching, or power control. Selection depends on voltage, speed, and thermal requirements for the application. BJT vs. MOSFET for switching: Which should I choose? For high-speed, power-efficient switching (e.g., PWM, digital circuits), MOSFETs excel due to voltage control and minimal gate current. BJTs, being current-controlled, suit analog amplification but have higher power loss in switching. Prioritize MOSFETs for fast, low-power switching and BJTs for linear control. Key diode selection parameters? Critical specs include:
  • Forward current (IF): Max continuous current.
  • Reverse voltage (VR): Peak blocking voltage.
  • Reverse recovery time (trr): Critical for high-speed switching (use Schottky diodes for <10ns). Also consider power dissipation and package type (e.g., through-hole vs. SMD).
Why is thermal management vital for discrete semiconductors? Overheating reduces lifespan and reliability. Power devices (e.g., MOSFETs, rectifiers) require heatsinks, thermal pads, or PCB copper pours to dissipate heat. Always check junction temperature (Tj) limits and derate components in high-temperature environments. Can I interface discrete semiconductors directly with microcontrollers? Yes, but ensure compatibility:
  • BJT/MOSFET switching: Add base/gate resistors to limit current/voltage.
  • Logic levels: 5V/3.3V MCUs may need level shifters for high-voltage transistors.
  • Current drive: Verify MCU pins can supply enough current for the load.