CZRUR27VB-HF

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The CZRUR27VB-HF diode is a single, Zener type diode. A Zener diode is a reverse-biased PN-junction diode that allows current to pass in the forward direction, but when the voltage reaches a certain level, a reverse breakdown occurs, resulting in a large reverse current. This breakdown voltage is manufactured to very tight tolerances, giving the name “Zener” diode.

CZRUR27VB-HF diodes are usually used in applications where protection from over-voltage, and voltage regulation is needed. In all cases, the diodes are connected in reverse bias to the voltage source. When the applied voltage exceeds the Zener breakdown voltage, a high current flows through the diode. This current is absorbed by the diode, thus protecting other components in the circuit from the high voltage.

The CZRUR27VB-HF Zener diodes have a breakdown voltage of 27V, with a peak power dissipation of 250mW, a static capacitance of 14pF, and an operating temperature range of -65 to 175°C. This makes them suitable for use in high voltage/heavy power applications, including power supplies, protection circuits, voltage regulation, and other related applications. Their small size also makes them suitable for use in circuits where space is a concern.

The working principle of a Zener diode is quite simple. When the diode is connected in reverse bias, the diode is always at a higher voltage than the voltage source. This puts it in the “reverse breakdown” region where the high electric fields cause carriers to be generated in the depletion region, allowing a large current to flow in the reverse direction. This current is referred to as the Zener current, and is directly proportional to the reverse voltage.

Once the diode is stressed to the Zener voltage, the voltage across the diode stays at a constant level even when the voltage source is increased beyond the Zener voltage. This is known as the Zener breakdown phenomenon, and is the working principle behind the operation of the CZRUR27VB-HF diode. This phenomemon enables the diode to act as a constant voltage regulator, providing a constant output voltage when the input voltage varies only within certain limits.

In summary, the CZRUR27VB-HF diodes are Zener-type, single diodes that are used in applications where protection from over-voltage and voltage regulation is needed. They have a breakdown voltage of 27V, a peak power dissipation of 250mW, a static capacitance of 14pF, and an operating temperature range of -65 to 175°C. Their working principle relies on the Zener breakdown phenomenon, enabling them to act as a constant voltage regulator, providing a constant output voltage when the input voltage varies only within certain limits.

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