Adafruit
1N4148 SMT SOD-123 Diodes - 100 Pack
$9.65
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A bulk pack of 100 surface-mount 1N4148 signal diodes in SOD-123 package. These are the same fast-switching 1N4148 diodes used in through-hole projects, but ...
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A bulk pack of 100 surface-mount 1N4148 signal diodes in SOD-123 package. These are the same fast-switching 1N4148 diodes used in through-hole projects, but in a compact SMT form factor — particularly popular for custom keyboard PCBs where each key switch needs its own diode.
Key Features
- SOD-123 Package – Compact surface-mount form factor
- Fast Switching – 4 ns reverse recovery time for high-frequency circuits
- Small Signal Use – Rated for 200 mA forward current
- 100 V Reverse Voltage – Suitable for most signal-level applications
- 100 Pieces – Bulk pack for keyboard builds and production runs
Specifications
- Part Number: 1N4148
- Max Forward Current: 200 mA
- Peak Reverse Voltage: 100 V
- Forward Voltage Drop: ~0.7 V (typical)
- Reverse Recovery Time: 4 ns
- Package: SOD-123 (surface mount)
Common Applications
- Custom mechanical keyboard PCBs (key matrix diodes)
- Signal rectification and clamping
- Switching and logic protection circuits
- SMD PCB production and assembly
Package Contents
- 100× 1N4148 signal diodes (SOD-123)
Note: This is a surface-mount part. SMD soldering skills are required. Looking for through-hole? See our 1N4148 through-hole 10-pack.
Jargon buster
Plain-language definitions for the technical terms used above.
- Forward voltage drop
- Forward voltage drop is the small amount of voltage lost across a diode or diode-like circuit when current flows through it. A lower drop is important because it wastes less power and helps keep the rest of the project supplied with enough voltage.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
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