Adafruit
1N4148 Signal Diode - 10 pack
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A 10-pack of 1N4148 small signal diodes — one of the most commonly used switching diodes in electronics. Designed for fast switching and small signal rectifi...
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A 10-pack of 1N4148 small signal diodes — one of the most commonly used switching diodes in electronics. Designed for fast switching and small signal rectification rather than power applications, with a reverse recovery time of just 4 ns.
Key Features
- Fast Switching – 4 ns reverse recovery time for high-frequency circuits
- Small Signal Use – Rated for 200 mA forward current (not for power rectification)
- 100 V Reverse Voltage – Suitable for most signal-level applications
- ~0.7 V Forward Drop – Standard silicon diode characteristics
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: DO-35 (axial)
Common Applications
- Signal rectification and clamping
- Logic gate protection
- Switching circuits
- Demodulation and detection
Package Contents
- 10× 1N4148 signal diodes
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- 1N4148
- A common small-signal switching diode used for low-current electronic signals. It is a good choice for fast signal switching or simple protection tasks, but not for carrying large power currents.
- Axial
- Axial components have one lead coming out of each end, so they lie flat or span holes on a circuit board or breadboard. This matters when checking whether the resistor will physically fit your prototyping or through-board assembly method.
- 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.
- peak reverse voltage
- The maximum reverse voltage a diode can block without breaking down. This matters in power supplies and protection circuits because the diode must withstand the highest voltage it may see when it is not conducting.
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