SMC30J40A

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TVS – Diode is a form of overvoltage protection device designed to protect sensitive electronics. It is composed of a transient-voltage-suppressing diode in series with a Zener diode, offering superior protection to circuits exposed to high voltages and fast rise time transients. SMC30J40A is an advanced overvoltage protection device designed for telecommunications, communication, and data traffic infrastructure networks.

SMC30J40A is specifically designed for applications aimed at protecting end-user equipment against electrical overstress caused by lightning strikes, power surges, and various other transient voltage phenomena. This device offers superior performance features compared to traditional diodes. It has a tri-mode feature which offers protection on balanced and unbalanced systems with identical capacitively coupled conditions. Additionally, it has surge-limiting protection for short circuits up to a sustained maximum peak-to-peak voltage of 40 thousand volts.

The SMC30J40A has a working principle that operates through a special self-acting mechanism. When lightning or any other abnormal surge voltage is applied, it clamps down the voltage to the peak-to-peak voltage of 40 thousand volts. At the same time, the tri-mode feature of the device allows it to protect both balanced and unbalanced systems with the same degree of efficacy. As the surge voltage or transient exceeds the voltage limit, the device quickly snaps into action and dissipates the excess energy, leaving the end-user equipment connected to it completely safe and unharmed.

At the basic level, the advanced SMC30J40A device is used to protect telecom end-user equipment from electrical overstress (EOS), surge voltage, and lightning strikes. It can also protect IoT components of industrial CNC systems, medical devices, and embedded Wi-Fi devices as well. The device supports high-speed communication links such as Gigabit Ethernet, Fibre Channel, T1/E1, SONET, OC-48, etc., and various other high-speed interfaces operating up to a maximum speed of 312.5 Mbps.

In some cases, the device is also used to protect automotive communication systems, such as CAN, LIN, and SAE J1850. Furthermore, the SMC30J40A can protect heavy-duty electrical automotive systems and their components, such as powertrain and safety systems, control units, and ECU’s. In addition to these primary applications, the device can also be used for EMC isolation, power line and signal line ESD protection, and to meet the safety and transient voltage immunity requirements of several electrical safety standards such as EN 61000-4-2, EN 61000-4-5, and IEC 60950-1.

The SMC30J40A is a powerful device that features an integrated current-limiting element which allows the device to disperse large bursts of transient current while limiting the peak current passing through it. This allows the device to absorb large surges of energy without getting damaged, and reduces the short-circuiting time of the surge. This makes the device especially suitable for usage in high-voltage and transient voltage applications.

Overall, the SMC30J40A from SMC Diode Solutions is an advanced overvoltage protection device designed to protect IoT systems, telecom systems, and various other applications from electrical overstress due to lightning strikes and surge voltage. Its superior performance features, such as clamps down the voltage to the peak-to-peak voltage of 40 thousand volts, tri-mode protection feature, and integrated current-limiting element make it a preferred choice for wide range of applications.

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