1.5SMC18AHE3/9AT

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TVS-Diodes (Transient Voltage Suppression Diodes) are predominantly employed in electronic circuit protection, and the main function of the TVS diode is to protect the circuit from short duration, high frequency transient voltages. The 1.5SMC18AHE3/9AT TVS diode is specially designed to protect sensitive electronic devices against electro-static discharge (ESD) from lightning and other transients.

The 1.5SMC18AHE3/9AT is a homogenous or bi-directional diode designed for the transient voltage suppression in medium power applications. It has a 5mm height package with a lead-free, RoHS compliant construction which makes it suitable for use in a variety of applications. The maximum operating temperature of the 1.5SMC18AHE3/9AT is specified at 125°C. This diode also features a very fast peak pulse current capability as it is designed to dissipate high energy over a wide frequency range.

The 1.5SMC18AHE3/9AT TVS diode has a working voltage range of 18V and is most commonly used in data lines or bus lines susceptible to ESD or transients. It is also frequently used in industrial automation equipment and communications, automotive, automotive engine control systems, power supplies, and portable medical devices. Its performance makes it ideal for use in applications requiring high surge critical breakdown voltage, low capacitance, and Current Interrupt Rate (CIR) ratings up to 15KV/us.

1.5SMC18AHE3/9AT TVS diodes are designed with a junction voltage that can be regulated depending on the breakdown voltage of the device. The on-state voltage of the diode is determined by the test voltage applied during manufacture. The characteristics of the device can be monitored by its own capacitance and also vary according to the stress applied during operation.

The working principle of the 1.5SMC18AHE3/9AT TVS diode is based on avalanche breakdown process. In this process, a region of reverse biased PN junction diode causes a change in the doping concentration within the diode. As a result, the electric field intensity rises to the avalanche breakdown level and destroys the device.

The 1.5SMC18AHE3/9AT TVS diode has a voltage clamping capability which allows it to regulate or clamp its own voltage within certain voltage limits. This feature ensures the device does not go beyond the configured breakdown voltage or let the voltage peak go too low. Moreover, the TVS diode can be activated even when the peak voltage of the transient is too low to trigger any other protection system.

The 1.5SMC18AHE3/9AT TVS diode is a reliable choice to shield electronic circuits against transient overvoltages. TVS diodes provide instantaneous ESD and surge protection from static build-up, lightning and other transient voltage events. The 1.5SMC18AHE3/9AT is extremely efficient in such scenarios, and can offer protection up to 15000 A peak current capabilities.

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