MMBZ4685-E3-18

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The MMBZ4685-E3-18 Zener diode is a single-band device designed for short-term overvoltage protection. It can be used in a variety of applications due to its wide range of operating temperature, low leakage current and small temperature coefficient. Its main application is to provide overvoltage protection for power supplies, phones, automotive electronics, computers and other electronic systems.

The MMBZ4685-E3-18 diode can handle a peak power of up to 150 mW with a voltage swing up to 18 V. It is manufactured using high-quality semiconductor materials and processes, which results in consistent device characteristics and reliable performance even in extreme temperatures. It is typically characterized by a breakdown voltage between 17 V to 19 V and surge current up to 200 mA. Additionally, the MMBZ4685-E3-18 diode offers reverse leakage current of under 150 nA and operating temperatures ranging from -40degC to +110degC.

The working principle of the MMBZ4685-E3-18 diode begins with its rectangular leeway junction. When forward biased, the diode acts as a short, allowing electrons to flow from the anode to the cathode, producing a current. When reverse biased, the diode acts as an open circuit, preventing the flow of current. When the reverse bias exceeds its rated Zener voltage, a potential breakdown occurs and the device conducts in reverse. This allows the diode to regulate the voltage level, protecting the circuit from sudden voltage surges. The leak current through the diode is determined by the dielectric breakdown of the junction. This current is relatively low and highly temperature independent.

The Zener diode MMBZ4685-E3-18 is widely used in circuit protection applications such as overvoltage protection, surge current protection, and EMI/RFI protection. It also finds use in active power supply filtering, power amplifier circuits, and medical electronic equipment. Adding a single Zener diode can provide the circuit with effective and reliable protection against sudden overvoltage, while holding the voltage ripple generated by the internal stage power circuits to a very low level. Additionally, it is suitable for UPS, telecom and automotive applications, making it an ideal solution for protecting circuits from over voltage events.

Hence, the MMBZ4685-E3-18 diode is an efficient, reliable and cost-effective protection solution for a number of applications. It is designed for short-term overvoltage protection and is suitable for use in power supplies, phones, automotive electronics, computers and other electronic systems. Additionally, its wide range of operating temperatures and low leakage current give it a significant level of versatility, allowing it to be used in a wide variety of applications.

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