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SMDJ18 - TVS Diode Encyclopedia Entry
Introduction
The SMDJ18 is a Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic components from voltage transients. This entry provides an overview of the SMDJ18, including its product category, basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models.
Product Category
The SMDJ18 belongs to the category of TVS diodes, which are semiconductor devices used to protect electronic circuits from overvoltage transients caused by lightning, electrostatic discharge (ESD), and other transient voltage events.
Basic Information Overview
- Use: The SMDJ18 is used to protect sensitive electronic components from voltage transients.
- Characteristics: It offers low clamping voltage, high surge capability, and fast response time.
- Package: The SMDJ18 is available in a surface-mount package.
- Essence: Its essence lies in providing robust transient voltage protection for electronic circuits.
- Packaging/Quantity: It is typically packaged in reels or tubes, with varying quantities depending on the manufacturer's specifications.
Specifications
- Peak Pulse Power: 3000 W
- Breakdown Voltage: 18 V
- Operating Voltage: 15.3 V
- Reverse Standoff Voltage: 15 V
- Clamping Voltage: 24.4 V
- Maximum Reverse Leakage Current: 1 µA
- Operating Temperature Range: -55°C to 150°C
Detailed Pin Configuration
The SMDJ18 typically has two pins, with the cathode connected to the ground and the anode connected to the protected circuit.
Functional Features
- Transient Voltage Suppression: Provides protection against voltage transients by diverting excess current away from sensitive components.
- Fast Response Time: Responds quickly to transient events, minimizing the risk of damage to the protected circuit.
Advantages and Disadvantages
Advantages
- High surge capability
- Low clamping voltage
- Fast response time
- Compact surface-mount package
Disadvantages
- Limited to specific voltage ratings
- May require additional circuitry for comprehensive overvoltage protection
Working Principles
When a transient voltage event occurs, the SMDJ18 conducts current to divert the excess energy away from the protected circuit, thereby limiting the voltage across the circuit.
Detailed Application Field Plans
The SMDJ18 is commonly used in various applications, including: - Telecommunication equipment - Industrial control systems - Automotive electronics - Consumer electronics - Power supplies
Detailed and Complete Alternative Models
- SMDJ5.0A: Breakdown Voltage - 5.0 V
- SMDJ12A: Breakdown Voltage - 12 V
- SMDJ24A: Breakdown Voltage - 24 V
- SMDJ36A: Breakdown Voltage - 36 V
In conclusion, the SMDJ18 TVS diode offers robust transient voltage protection for a wide range of electronic applications, making it an essential component in safeguarding sensitive circuits from damaging voltage transients.
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What is SMDJ18?
- SMDJ18 is a type of surface mount transient voltage suppressor diode, commonly used to protect electronic circuits from voltage spikes and transients.
What is the maximum working voltage of SMDJ18?
- The maximum working voltage of SMDJ18 is 18 volts.
What is the peak pulse power of SMDJ18?
- The peak pulse power of SMDJ18 is typically 3000 watts.
What are the typical applications of SMDJ18?
- SMDJ18 is commonly used in electronic equipment such as computers, telecommunication equipment, and consumer electronics to protect against voltage surges and ESD (electrostatic discharge).
What is the response time of SMDJ18?
- The response time of SMDJ18 is very fast, typically responding within nanoseconds to clamp the voltage spike.
What is the operating temperature range of SMDJ18?
- The operating temperature range of SMDJ18 is usually between -55°C to +150°C.
How does SMDJ18 compare to other TVS diodes in terms of performance?
- SMDJ18 offers high surge capability and low clamping voltage, making it suitable for protecting sensitive electronic components.
Can SMDJ18 be used in automotive applications?
- Yes, SMDJ18 can be used in automotive applications where protection against voltage transients is required.
What is the package type of SMDJ18?
- SMDJ18 is typically available in a surface mount package, such as SMB or SMC.
Are there any recommended layout considerations when using SMDJ18 in a circuit?
- It is recommended to minimize the length of the traces connecting SMDJ18 to the protected circuit and to ensure a low impedance path to ground for effective transient suppression.