SMBG12HE3/5B

TVS - Diodes

The SMBG12HE3/5B is an unidirectional or bidirectional transil from STMicroelectronics, specifically designed for protecting high-speed data lines from overvoltage and electrostatic discharges. It belongs to a large family of TVS (Transient Voltage Suppressors) Diodes, which feature high surge capability and excellent clamping performance.

Application Field

The SMBG12HE3/5B transil is a low capacitance and low clamping voltage TVS - Diode, designed for protecting all types of sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. It can be used in High Frequency (HF) and Radio Frequency (RF) interface applications, such as Gigabit Ethernet and DDR Memory, as well as in automotive applications like airbag systems.

It is also suitable for protecting sensitive electronic circuits against contact ESD or indirect lightning attacks.

Working Principle

The working principle of this type of TVS - Diode is based on its capability of conducting current of sufficient magnitude and of a short enough duration to protect the connected electronic equipment from the overvoltage and electrostatic discharges. This can be achieved by using a low axial capacitance (Cl) and low clamping voltage (Vc) design.

The Cl value of the SMBG12HE3/5B transil determines how quickly and effectively the TVS diode can absorb and buffer the energy of transient events, whereas the Vc of the diode will define the maximum voltage that can be applied to the protected circuit before the TVS begins operating. The SMBG12HE3/5B transil provides a low Cl value of 30pF and a low Vc of 10V.

Besides, the SMBG12HE3/5B transil uses a high energy-absorbing capability to ensure the low absolute maximum clamping voltage, and thus protect more sensitive electronic equipment from voltage transients.

Conclusion

The SMBG12HE3/5B TVS - Diode from STMicroelectronics has been designed to provide high surge capability and excellent clamping performance for protecting a variety of sensitive electronic equipment from overvoltage and electrostatic discharges. Its low Cl value and low Vc design offer the ideal combination for optimal transient protection.