SMAJ18A

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SMAJ18A

+BOM

TVS DIODE 21.1VWM 29.2VC DO214AC

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Specifications

Attribute Value
Package Tape & Reel (TR)
Series SMAJ
ProductStatus Active
Type Zener
UnidirectionalChannels 1
Voltage-ReverseStandoff(Typ) 21.1V
Voltage-Clamping(Max)@Ipp 29.2V
Power-PeakPulse 400W
Applications General Purpose
OperatingTemperature -55°C ~ 150°C (TJ)
MountingType Surface Mount
Package/Case DO-214AC, SMA

Overview

Description

The SMAJ18A is a type of TVS (Transient Voltage Suppressor) diode used to protect sensitive electronic equipment from voltage spikes and transient events such as lightning strikes, electrostatic discharge, and inductive load switching. It is part of the SMAJ series, characterized by its compact SMA (Surface-Mount Assembly) package, making it suitable for surface-mount applications. The "18A" in its name typically indicates the breakdown voltage or the ability to handle a specific range of voltages, roughly around 18 volts.
These diodes are designed to clamp excess voltage to a safe level, thus protecting the downstream components in a circuit. The SMAJ18A offers benefits such as fast response time, low clamping voltage, and high peak pulse power dissipation, making it ideal for use in various consumer electronics, telecommunications, and industrial applications. It is essential for enhancing the reliability and longevity of electronic devices by preventing damage from unexpected transient voltage events.

Equivalent

The SMAJ18A is a surface-mount TVS (Transient Voltage Suppressor) diode used for ESD protection and voltage clamping. Equivalent products include:
1. Littelfuse SMAJ18A
2. ON Semiconductor 1SMA18CAT3G
3. Vishay SMA6J18A
4. Nexperia PESD18VL1BA
5. Bourns SMAJ18A
Ensure compatibility by checking the exact electrical specifications and package outlines in the datasheets before substitution.

Features

The SMAJ18A is a surface-mount Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. Here are its key features:
1. Breakdown Voltage: It has a breakdown voltage of around 18V.
2. Power Dissipation: The device can handle a peak pulse power dissipation of 400 watts (10/1000µs waveform).
3. Response Time: Offers fast response time, typically less than 1.0 picosecond from 0V to BV.
4. Package Type: Comes in a DO-214AC (SMA) package.
5. Polarity: Available in both unidirectional and bidirectional configurations.
6. Low Leakage: Exhibits low leakage current.
7. Compliance: Meets various standards for reliable performance, including IEC 61000-4-2 for ESD.
8. Clamping Voltage: Provides low clamping voltage to protect downstream components.
9. Temperature Range: Operates effectively over a wide temperature range.
10. RoHS Compliant: Environmentally friendly, meeting RoHS standards.
This combination of features makes the SMAJ18A suitable for safeguarding circuits in telecommunications, consumer electronics, and industrial applications.

Pinout

The SMAJ18A is a Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. It typically comes in a DO-214AC (SMA) package, which is a surface-mount package with two pins. One pin is the anode, and the other is the cathode.
Pin Count: 2 pins
Function: The SMAJ18A is designed to clamp over-voltage transients to a safe level, thus protecting downstream components. It is uni-directional, meaning it is designed to protect circuits from positive over-voltage transients. The "18A" indicates a nominal breakdown voltage of 18 volts. When the voltage across the device exceeds this breakdown voltage, the diode conducts current and clamps the voltage to a safer level. It is commonly used in power supply lines, data lines, or any point in a circuit where voltage spikes could cause damage.

Manufacturer

The SMAJ18A is a type of transient voltage suppressor (TVS) diode. It is manufactured by several companies, including Littelfuse, Vishay Intertechnology, and STMicroelectronics. These companies are all major players in the electronics industry, known for producing a wide array of semiconductors and electronic components.
1. Littelfuse: An American company founded in 1927, Littelfuse specializes in circuit protection, power control, and sensing technologies. It serves a wide range of industries, including automotive, industrial, and consumer electronics.
2. Vishay Intertechnology: Based in the United States, Vishay was founded in 1962. It is one of the world's largest manufacturers of discrete semiconductors and passive electronic components, used in various sectors such as automotive, industrial, computing, consumer, telecommunications, military, aerospace, and medical.
3. STMicroelectronics: A multinational electronics and semiconductor manufacturer headquartered in Switzerland. Founded in 1987, STMicroelectronics is a leader in developing and delivering semiconductor solutions across various applications, including industrial, automotive, personal electronics, and communications equipment.
Each of these companies is involved in the innovation, development, and supply of electronic components crucial for modern technology infrastructure.

Application

The SMAJ18A is a type of Transient Voltage Suppression (TVS) diode used primarily for protecting sensitive electronic equipment from voltage spikes and transient overvoltages. Its application areas include:
1. Telecommunication Equipment: Protects line interfaces and sensitive components from voltage transients.
2. Consumer Electronics: Safeguards devices like televisions and home appliances from electrical surges.
3. Automotive Electronics: Used in protection circuits to shield against load dump and inductive load switching.
4. Industrial Electronics: Ensures the longevity and reliability of control systems and instrumentation subjected to harsh electrical environments.
These diodes are crucial in maintaining the integrity and performance of electronic systems across various sectors.

Package

The SMAJ18A is a surface-mount transient voltage suppressor diode. Its package type is typically DO-214AC, also known as SMA, which is a flat, surface-mounted package suitable for protecting sensitive electronics from voltage spikes.