SMBJ12CA-Q

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TVS - Diodes

A transient voltage suppressor (TVS) diode is a type of unidirectional electronic device designed specifically to absorb and redistribute very high electrical energy that exceeds the rated power dissipation of the device. The device uses an intrinsic reverse connection between two ports (anode and cathode) whose purpose is to absorb extremely high surges of current in a very short period of time. The device is designed to function when transient voltages and currents reach values that may be in excess of the normal operating voltages and currents. Applications for a TVS diode include the protection of sensitive electronic equipment from damage due to electrical surges, electromagnetic interference, and lightning surges.

The SMBJ12CA-Q is a surface mount Transient Voltage Suppressor (TVS) diode designed to protect sensitive electronic components from high voltage transients. It provides an off-state breakdown voltage of 12V and has a low clamping voltage of 10.2V. The device is a unidirectional diode which can protect against ESD strikes up to 25KV. It is rated for peak power dissipations up to 1.5W (10/1000μs) with a maximum clamping voltage of 9.3V at an application peak currents of 200A.

SMBJ12CA-Q Application Field

The SMBJ12CA-Q is used in applications which require surge protection, including automotive, industrial, telecommunications, medical, and consumer electronics applications. It is suitable for guarding against voltage transients caused by electrostatic discharge, inductive load switching, and lightning. Some applications include:

• Automotive electronics
• Telecommunications equipment
• Computer systems & peripheral devices
• Industrial electronics & controllers
• Consumer electronics & audio equipment
• Medical instrumentation

SMBJ12CA-Q Working Principle

The working principle of the SMBJ12CA-Q is based on the reverse connection between two ports (anode and cathode). The device is designed to clamp the voltage when the input voltage to the anode reaches 12V, the voltage across the device will begin to drop as the current is drawn through the diode. This is known as the “clamping” voltage which limits the amplitude of voltage transients that can be applied to the protected circuit.

The SMBJ12CA-Q is designed to absorb extremely high surges of current in a very short period of time. The device is also resistant to operating conditions such as repetitive peak pulse power dissipation or high temperature. In the event of high voltage transients, the device will redistribute the electrical energy and protect the sensitive electronic equipment from damage.

The SMBJ12CA-Q is a unidirectional device with a peak pulse power dissipation of 1.5W and a peak pulse current surge of 200A. It has an off-state breakdown voltage of 12V, a low clamping voltage of 10.2V and an operational temperature range from -55°C to +150°C. The device is also ESD tested and is able to withstand electrostatic discharges up to 25KV.

The SMBJ12CA-Q is a durable and reliable device which provides effective protection to equipments in applications with a 12 VDC operating point.

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