LL4148 High-Speed 100 V Switching Diode | Mini-MELF | General-Purpose Signal Switching HORNBY

The LL4148 is a high-speed silicon switching diode designed for compact, high-density electronic circuits requiring fast switching, low leakage, and stable performance.
With a 100 V reverse voltage rating, fast recovery time, and low junction capacitance, it is ideal for signal routing, logic circuits, protection functions, and general-purpose low-current applications.
Its Mini-MELF (LL-34) package provides enhanced mechanical stability and automated SMD assembly compatibility.

Key Specifications

• VRRM (Maximum Reverse Voltage): 100 V

• trr (Reverse Recovery Time): 4 ns

• IF (Forward Current, max): 150200 mA continuous, 500 mA surge

• IFSM (Non-Repetitive Surge Current): 1 A

• VF (Forward Voltage @ 10 mA): 1.0 V

• CJ (Junction Capacitance): 0.1 pF typical

• IR (Leakage Current): 25100 nA

• Package: Mini-MELF (LL-34)

Applications

• High-speed signal switching

• Logic circuits and digital routing

• Clamping and protection functions

• Wave shaping and signal detection

• Portable and compact electronic devices

• General-purpose switching in SMD designs

Features

• Ultra-fast switching (≈4 ns)

• Low leakage current

• Low junction capacitance

• Mini-MELF SMD package for automated assembly

• High stability and long-term reliability

• Industry-standard alternative to 1N4148 in SMD form