SMCJ18CA

The SMCJ18CA is a type of transient voltage suppressor (TVS) diode, specifically designed to protect sensitive electronic components from voltage spikes and transients. It is part of the SMCJ series produced by FTR (Fairchild Semiconductor), which is known for its reliability and performance in various applications.

Physical Characteristics:

• Package Type: The SMCJ18CA is housed in a DO-214AB (SMC) package, which is a surface-mount device (SMD) that allows for easy integration into circuit boards. The package is typically rectangular and has a robust construction to withstand mechanical stress.
• Dimensions: The dimensions of the SMC package are approximately 5.2 mm in length, 4.5 mm in width, and 1.5 mm in height, making it compact enough for space-constrained applications.
• Terminals: It features two leads that are designed for soldering onto a PCB, providing a secure electrical connection.

Electrical Characteristics:

• Reverse Stand-Off Voltage (V_RWM): The SMCJ18CA has a reverse stand-off voltage of 18 volts, which means it can handle continuous voltage levels up to this threshold without conducting.
• Clamping Voltage (V_C): During a transient event, the clamping voltage is typically around 28.5 volts, ensuring that the voltage does not exceed this level, thus protecting downstream components.
• Peak Power Dissipation: The device can handle peak power dissipation of up to 400 watts for a short duration (typically 8/20 µs pulse), making it suitable for high-energy transient events.
• Capacitance: The capacitance of the SMCJ18CA is low, typically around 100 pF, which minimizes signal distortion in high-frequency applications.

Applications:

The SMCJ18CA is widely used in various electronic applications, including:

• Telecommunications: Protecting communication lines from voltage spikes caused by lightning or switching surges.
• Consumer Electronics: Safeguarding devices like televisions, computers, and home appliances from electrical transients.
• Industrial Equipment: Ensuring the reliability of control systems and machinery by preventing damage from voltage surges.

Performance Features:

• Fast Response Time: The SMCJ18CA is designed to respond quickly to transient events, providing immediate protection to sensitive components.
• High Reliability: With a robust construction and high-quality materials, this TVS diode is built to last, ensuring long-term performance in demanding environments.
• RoHS Compliant: The device is compliant with RoHS regulations, making it suitable for environmentally conscious designs.

In summary, the SMCJ18CA from FTR is a reliable and efficient transient voltage suppressor that offers robust protection for electronic circuits against voltage spikes, making it an essential component in various applications across different industries.