Overview
The 1N4148 diode, produced by Vishay General Semiconductor - Diodes Division, is a high-speed switching diode widely used in various electronic applications. It is a general-purpose silicon diode known for its fast switching characteristics and versatility. The 1N4148 is encapsulated in a hermetically sealed leaded glass SOD27 (DO-35) package, making it suitable for a broad range of applications including high-speed switching, rectification, and signal processing.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Voltage (VRRM) | 100 | V |
| Maximum Current (IF) | 300 mA (continuous), 450 mA (repetitive peak) | mA |
| Peak Current (IF) | 2 A (for no more than 1 μs) | A |
| Forward Voltage Drop (VF) | 0.7 V to 1 V | V |
| Reverse Current (IR) | Varies with voltage and temperature | nA |
| Recovery Time | 8 ns (typical), 4 ns (ideal conditions) | ns |
| Capacitance (CD) | 4 pF (maximum) | pF |
| Operating Temperature | -65°C to 175°C | °C |
Key Features
- High-speed switching with a recovery time of 8 ns (typical) and as low as 4 ns under ideal conditions.
- Hermetically sealed leaded glass SOD27 (DO-35) package.
- Maximum voltage rating of 100 V and maximum current rating of 300 mA (continuous), with peak currents up to 2 A for short durations.
- Low forward voltage drop of 0.7 V to 1 V.
- Intrinsic capacitance of 4 pF, making it suitable for high-frequency circuits.
Applications
- High-speed switching and digital logic circuits.
- Rectification: Converting AC to DC in power supplies and other electronic circuits.
- Signal Demodulation: Demodulating AM signals in radio receivers.
- Clipping and Clamping Circuits: Limiting voltage levels in audio and other circuits.
- Voltage Regulation: Used in conjunction with other components for simple voltage regulation.
- Flyback Diode: Protecting against voltage spikes in inductive loads like relays or motors.
- Protection Diode: Protecting sensitive components from voltage spikes and reverse voltage.
- Logic Gates: Implementing simple logic functions like AND, OR, NOT, etc..
- Voltage Multipliers: Generating higher DC voltages from an AC source.
Q & A
- What is the maximum voltage rating of the 1N4148 diode?
The maximum voltage rating of the 1N4148 diode is 100 V.
- What is the maximum continuous current the 1N4148 diode can handle?
The 1N4148 diode can handle a maximum continuous current of 300 mA.
- What is the recovery time of the 1N4148 diode?
The recovery time of the 1N4148 diode is typically 8 ns and can be as low as 4 ns under ideal conditions.
- What is the intrinsic capacitance of the 1N4148 diode?
The intrinsic capacitance of the 1N4148 diode is 4 pF.
- What are some common applications of the 1N4148 diode?
The 1N4148 diode is commonly used in high-speed switching, rectification, signal demodulation, clipping and clamping circuits, voltage regulation, and as a flyback and protection diode.
- What package type is the 1N4148 diode available in?
The 1N4148 diode is available in a hermetically sealed leaded glass SOD27 (DO-35) package.
- Can the 1N4148 diode be used in high-frequency circuits?
Yes, the 1N4148 diode is suitable for high-frequency circuits due to its fast recovery time and low intrinsic capacitance.
- What is the forward voltage drop of the 1N4148 diode?
The forward voltage drop of the 1N4148 diode is between 0.7 V to 1 V.
- Can the 1N4148 diode handle peak currents?
Yes, the 1N4148 diode can handle peak currents up to 2 A for no more than 1 μs.[
- What is the operating temperature range of the 1N4148 diode?
The operating temperature range of the 1N4148 diode is -65°C to 175°C.[
- Is the 1N4148 diode suitable for logic gate applications?
Yes, the 1N4148 diode can be used to implement simple logic functions like AND, OR, NOT, etc., in combination with other diodes and resistors.[
