SMCJ220

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The SMCJ220 is a Bridge style TVS diode that is designed to protect sensitive electronic equipment from damaging voltage transients and surges. TVS diodes are specialized, low power semiconductor devices that act as a “Voltage-Gated Fuse”. They act as a high-speed, low impedance switch during the transient and a low resistance path during conduction.

The SMCJ220 is a bidirectional device that has suppressive capacitance, typically around 15pF, so on-state losses are minimized. It offers significant advantages over other traditional multilayer varistors, including its smaller size, greater reliability and better clamping performance over a wide range of frequencies. Additionally, the device has a superior thermal response with a very low thermal runaway.

The SMCJ220 can be found in a variety of applications including Power Supply and Telecom/Data Systems. It can be used to protect ports, cards, USB ports, Ethernet Ports, I/O lines, RS232 and RS485 lines, LAN applications, and more. It is also an ideal solution for military/aerospace, computers, consumer electronics, LEDs, renewable energy, and automotive applications.

Theworking principle of the SMCJ220 TVS diode is simple. When a high voltage transient event such as lightning or electrostatic discharge occurs, the TVS diode is designed to detect the high energy and quickly create a conducting path. This redirects the voltage and amperage away from sensitive circuits, limiting the flow of current. When the surge is over, the TVS diode will switch back to its normal, non-conducting state, returning the circuit to its normal operating condition.

The SMCJ220 offers a low capacitance of 15pF, which minimizes on-state losses. Its bidirectional nature allows it to protect both directions of polarity in equipment such as PCs. This provides the most comprehensive protection for electronic components. Additionally, the device has a low 5nA reverse leak current at 5V, further protecting components.

The SMCJ220 also offers advanced thermal performance. Its temperature-dependent characteristic reduces thermal runaway, and its low 5mV turn-on and clamping voltage delivers precise and reliable protection. Its very low leakage current and low capacitance makes it ideal for high speed applications.

Overall, the SMCJ220 TVS diode is an effective protection option for high voltage sensitive components found in a variety of applications. Its advanced thermal performance, low capacitance, and bidirectional functionality make it an ideal choice for high speed, high reliability applications.

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