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What is 1N4148?

It has a fast switching speed and low forward voltage drop, making it suitable for use in high-speed switching and rectification circuits. It is commonly used in signal processing circuits, such as mixers, amplifiers, and detectors, as well as in power supplies and voltage regulators.

When a positive voltage is applied to the anode, the diode conducts and allows current to flow through it. When a negative voltage is applied to the anode, the diode does not conduct and blocks current flow.

Part Number: 1N4148

Function: 100V, HIGH SPEED SWITCHING DIODE, RECTIFIER

Package: Axial Type, DO-34, DO-35 Type

Manufacturer: DC COMPONENTS

Image and Pinouts:
1N4148 Datasheet PDF Switching Diodes

Description

The 1N4148 is Switching Diode, Rectifier. This diode has a maximum forward current rating of 150mA and a maximum reverse voltage rating of 100V. It is housed in a DO-35 package and has a cathode band marked on one end to indicate the polarity.

Features

1. Silicon epitaxial planar diodes

2. Low leakage

3. Low forward voltage

4. High speed switching

5. High current capability

6. High reliability

MECHANICAL DATA

1. Case: Glass sealed case

2. Lead: MIL-STD-202E, Method 208 guaranteed

3. Polarity: Color band denotes cathode end

4. Mounting position: Any

5. Weight: 0.13 gram

1N4148 Rectifier Diode Datasheet PDF

Other data sheets are available within the file: IN4148, 1N4150, 1N4154

What is SMAJ20CA?

The SMAJ20CA diode is designed to clamp transient voltage spikes to a safe level before they can damage sensitive electronic components. This is 400W, 20V, TVS Diode.

The “SMA” in SMAJ20CA refers to the package type, which is a surface mount package with a rectangular shape and a J-bend lead configuration. The “J” in the part number refers to the fact that the leads of the diode are bent in a J-shape to facilitate mounting on a circuit board.

The “CA” in the part number refers to the tolerance of the diode, which is ±5%. This means that the actual breakdown voltage of the diode may vary by up to 5% from the nominal value of 20 volts.

Features

1. 400W Peak Pulse Power Dissipation
2. Glass Passivated Die Construction
3. Unidirectional and Bidirectional Versions Available
4. Excellent Clamping Capability
5. Fast Response Time
6. Lead Free Finish/RoHS Compliant
7. Green Molding Compound (No Halogen and Antimony)

Mechanical Data

1. Case : SMA
2. Case Material : Molded Plastic. UL Flammability Classification Rating 94V-0
3. Moisture Sensitivity : Level 1 per J-STD-020
4. Terminals : Lead-Free Plating (Matte Tin Finish). Solderable per MIL-STD-202, Method 208
5. Polarity Indicator : Cathode Band (Bi-directional devices do not have a polarity indicator.)
6. Weight: 0.064 grams (Approximate)

Other data sheets are available within the file: SMAJ10CA, SMAJ100CA, SMAJ100A, SMAJ100CA, SMAJ10A

FAQs:

1. What is the difference between a TVS diode and a regular diode?

A TVS diode is specifically designed to protect against voltage spikes or transients, while a regular diode is designed to allow current to flow in only one direction. TVS diodes have a much higher peak power dissipation rating and can handle much higher voltage spikes than regular diodes.

2. What happens when a TVS diode is subjected to a voltage spike?

When a TVS diode is subjected to a voltage spike that exceeds its breakdown voltage, it switches from a high-impedance state to a low-impedance state, effectively shunting the excess voltage away from the sensitive electronic components and dissipating

Rectifier

1N4148 Rectifier – 100V, 500mW, Switching Diode ( PDF )

What is 1N4148?

Description

Features

MECHANICAL DATA

1N4148 Rectifier Diode Datasheet PDF

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SMAJ20CA Diode – 400W, 20V, TVS, Rectifier, SMD Type

What is SMAJ20CA?

Features

SMAJ20CA Datasheet PDF Download

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