SMF16AT1G Circuit Protection

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TVS – Diodes are devices used to provide protection from voltage transients, often found on power systems. These are typically used to protect systems and components from electrostatic discharges (ESD), electrical fast transients (EFT) and electrical surges. The TVS-Diode solution provides an effective solution against these transients by providing a low impedance path for current discharge, which is in turn dissipated as heat to the atmosphere.

The SMF16AT1G is a low capacitance TVS (Transient Voltage Suppressor) diode providing ESD protection to sensitive high-speed data lines for automotive and industrial applications. It has a working voltage range of 16 to 24V (VDRM) with a minimum IEC static discharge level at 16A. The SMF16AT1G is a unidirectional device with bidirectional suppression, which is optimized for signal line protection up to 3.0 GHz. The device consists of two Avalanche Breakdown Diodes (ABDs) in series, providing optimized clamping performance intended for protection of high speed data lines (e.g. Telecommunication, Programmable Logic Controllers and Automotive Data Buses). Due to the high ESD protection, the device is suitable to be used in harsh environment.

Its applications include protection solutions for high-speed differential data lines, such as Telecommunication, Programmable Logic Controllers and Automotive Data Buses. The device provides a reliable protection against electrostatic discharges (ESD) to IEC 61000-4-2 Level 4 (±16KV contact and ±8KV air) and Surges to UL1449 Edition 3 and IEC 61000-4-5. The device is also suitable for applications on long differential lines such as USB, LVDS and Optical Transceivers.

The SMF16AT1G has a working principle based on the silicon PIN diode structure. When voltage transient spike exceeds the avalanche voltage, the ABDs break down and become low impedance which limits the trough voltage to the clamp voltage. The low capacitance of ABDs keeps the voltage level below the trough voltage losses and protects the system. The power dissipation of the device must be taken into account for the prevention of device destruction.

The SMF16AT1G is a reliable and cost effective solution for the protection of sensitive signal and data lines. It also comes with an additional feature of bidirectional protection due to the integrated two diodes in series, making it possible to protect both polarities and provide a long transient pulse protection. It provides a low capacitance and is suitable for a wide range of application from high-speed differential data lines to long differential lines, such as USB, LVDS and Optical Transceivers.

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