1N4148 Diode (Pack of 10)
1N4148 Diode (Pack of 10)
The 1N4148 Diode is a standard, general-purpose switching diode suitable for a wide range of applications. This pack of 10 diodes provides a convenient and cost-effective solution for prototyping, development, and production of IoT projects. Each diode is a discrete, axial-lead, glass-passivated semiconductor device designed for high-speed switching and rectification.
| The 1N4148 Diode is primarily used for |
The diode acts as a switch, allowing current to flow in one direction (forward bias) and blocking it in the other direction (reverse bias).
The diode converts AC (alternating current) voltage to DC (direct current) voltage.
The diode provides overvoltage protection by clamping or limiting voltage spikes.
| Peak Reverse Voltage (VRRM) | 100 V |
| Maximum Average Forward Current (IF(AV)) | 200 mA |
| Peak Forward Surge Current (IF(SM)) | 4 A |
| Operating Junction Temperature (TJ) | -65C to 175C |
| Forward Voltage Drop (VF) | 1.0 V at IF = 100 mA |
| Reverse Current (IR) | 25 nA at VR = 75 V |
| Reverse Recovery Time (trr) | 4 ns |
| Capacitance (Cd) | 2 pF |
Axial lead, glass-passivated
Tin-plated copper
0.2 g (approx.)
-65C to 175C
-65C to 250C
RoHS (Restriction of Hazardous Substances) compliant
CE (Conformit Europene) marked
| The 1N4148 Diode is suitable for various IoT applications, including |
Power supplies and voltage regulators
Motor control and driver circuits
Logic circuits and digital systems
Audio and signal processing circuits
Automotive and industrial control systems
This pack of 10 diodes is shipped in a sealed, resealable plastic bag or tube, ensuring protection from moisture and physical damage.
When handling the diodes, use electrostatic discharge (ESD) protection to prevent damage.
Ensure proper storage and handling to maintain the diodes' electrical characteristics.
Follow proper soldering techniques to avoid overheating and damage.
By incorporating the 1N4148 Diode into your IoT project, you can take advantage of its reliable performance, compact design, and cost-effectiveness, ensuring a successful and efficient development process.
1N4148 Diode - (Pack of 10) DocumentationOverviewThe 1N4148 diode is a general-purpose switching diode designed for high-speed switching applications. It is a popular and widely used diode in electronic circuits due to its low forward voltage drop, high switching speed, and low capacitance. This pack of 10 diodes is ideal for prototyping, proof-of-concept, and production applications.FeaturesHigh-speed switching diode
Low forward voltage drop (Vf): 1.0V @ 10mA
High switching speed: 4ns recovery time
Low capacitance: 2pF
Operating temperature range: -65C to 175C
Maximum repetitive peak reverse voltage: 100VPinoutThe 1N4148 diode has a standard axial lead package with two terminals:Anode (A): Positive terminal
Cathode (K): Negative terminalExample Circuits### Example 1: Simple Rectifier CircuitIn this example, we will use the 1N4148 diode as a rectifier to convert an alternating current (AC) signal to a direct current (DC) signal.Circuit Diagram
```markdown
+-----------+
| |
| AC Source |
| |
+-----------+
|
|
v
+-----------+ +-----------+
| | | |
| R1 (1k) | | C1 (10F) |
| | | |
+-----------+ +-----------+
|
|
v
+-----------+ +-----------+
| | | |
| 1N4148 Diode | | R2 (1k) |
| (Anode to R1) | | |
+-----------+ +-----------+
|
|
v
+-----------+
| |
| DC Output |
| |
+-----------+
```
Code Example (Arduino)
```c
const int acSignal = A0; // AC signal input
const int dcOutput = 2; // DC output pinvoid setup() {
pinMode(acSignal, INPUT);
pinMode(dcOutput, OUTPUT);
}void loop() {
int acValue = analogRead(acSignal);
int dcValue = 0;
// Rectify the AC signal using the 1N4148 diode
if (acValue > 512) {
dcValue = map(acValue, 512, 1023, 0, 255);
}
analogWrite(dcOutput, dcValue);
delay(10);
}
```
### Example 2: Overvoltage Protection CircuitIn this example, we will use the 1N4148 diode to protect a microcontroller from overvoltage conditions.Circuit Diagram
```markdown
+-----------+
| |
| Power Source |
| (up to 12V) |
+-----------+
|
|
v
+-----------+ +-----------+
| | | |
| 1N4148 Diode | | R1 (1k) |
| (Cathode to GND) | | |
+-----------+ +-----------+
|
|
v
+-----------+
| |
| Microcontroller |
| (e.g., Arduino) |
+-----------+
```
Code Example (Arduino)
```c
const int overvoltagePin = A1; // Overvoltage detection pin
const int ledPin = 13; // LED indicator pinvoid setup() {
pinMode(overvoltagePin, INPUT);
pinMode(ledPin, OUTPUT);
}void loop() {
int voltageReading = analogRead(overvoltagePin);
float voltage = voltageReading 0.01173; // Convert to voltage value
if (voltage > 12.0) {
digitalWrite(ledPin, HIGH); // Turn on LED to indicate overvoltage
} else {
digitalWrite(ledPin, LOW); // Turn off LED
}
delay(100);
}
```
Important NotesAlways use a resistor in series with the diode to limit the current and prevent damage.
Ensure the diode is connected correctly, with the anode (positive terminal) connected to the positive side of the circuit and the cathode (negative terminal) connected to the negative side.
The 1N4148 diode is not suitable for high-power applications. For such applications, a higher-power diode or other components like thyristors or TRIACs should be used.