SMPZ3940B-E3/85A

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The SMPZ3940B-E3/85A is a three terminals Zener voltage regulator. This element is classified as a single Zener diode, capable of rectifying and conducting AC signals while blocking and regulating DC voltage. Due to its high efficiency and compact size, the SMPZ3940B-E3/85A is widely used in many applications.

The most common application fields for the SMPZ3940B-E3/85A are power and automotive. For example, the device is used in power supply designs such as AC and DC power adapters, how home electronics, computers and battery-based systems require reliable AC-to-DC conversion. In automotive, the SMPZ3940B-E3/85A can be found in fuel injection systems, electric vehicle charging systems, switches, starters and alternators.

The working principle of the SMPZ3940B-E3/85A is based on the properties of the Zener diode. When a DC voltage is applied to the anode, it will cause electrons to flow from the anode to the cathode. This process is called forward conduction; however, when the voltage is reversed, the device will act as an insulating diode, blocking any current from flowing in a reverse direction. This effect is known as reverse breakdown.

When the Zener diode is connected in a reverse bias, the voltages will typically remain between a certain range. This is known as the Zener voltage and it corresponds to a specific value that will depend on the type of diode. In the case of the SMPZ3940B-E3/85A, the breakdown Voltage (Vz) is equal to 8.5V. This means that any voltage applied to the diode will remain constant at 8.5V, regardless of the amount if current that is flowing through the element.

The SMPZ3940B-E3/85A Zener diode also features a high power dissipation (PD) rating of up to 200mW. This is particularly helpful when the device is being used in high-power applications. Additionally, this element is both RoHS-compliant and compliant with international safety standards, making it safe to use in products that are sold worldwide.

The SMPZ3940B-E3/85A is a reliable Zener diode that can be used in a wide variety of applications. Its high efficiency, compact size and wide operating temperature range ensure that it can handle both AC and DC signals with ease. The device is commonly used in power supplies, automotive and home applications, where reliable voltage regulation and protection is required. Additionally, its high power dissipation rating and safety certifications make it a great choice for commercial applications.

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