CZ5348B TR Datasheet/PDFDiodes - Zener - Single: CZ5348B TR application field and working principle
The CZ5348B TR is a 9.1 Volt Zener Diode that displays high peak power and low reverse leakage current. It’s an ideal component for regulating, protecting, and stabilizing low voltage circuits. Widely used in audio/screen equipment, power amplifiers, television and computers, it can serve as a temperature sensor and support general-purpose rectification and protection in circuits.
This diode is encapsulated in the MiniMELF and measures 2.4 mm x 1.4 mm, making it small and easy to integrate in printed circuit boards. It has a maximum reverse current of 50 nA, a maximum reverse voltage of 9.1V, and a power dissipation of 350mW, making it suitable for certain applications. It also displays very low thermal resistance from junction to ambient and a maximum operating junction temperature of 125°C.
Working Principle
The CZ5348B TR is a Zener diode, which has the characteristic of conducting when its anode-cathode voltage reaches its breakdown value, between zero and several volts. It is composed of two terminal junctions connected to two thin metal contacts, the anode and the cathode. It has a special thin P-N junction, that is heavily doped with impurity atoms.
When the voltage applied to the two diodes exceeds the Zener breakdown voltage, a large diffusion current flows into the diode. As a result, for the Zener diode to operate, the current must be externally limited to prevent them from breaking down. This is why Zener diodes are usually used together with resistors.
When forward biased, the CZ5348B opens and operates may a typical diode. In forward bias mode, it can function as a temperature sensor, rectifier and/or amplifier. On the other hand, when reverse-biased at voltages above the Zener voltage (aka Zener breakdown), it will start to conduct forming a stable voltage regulator, supplying approximately 9.1V to the circuit.
Applications
The CZ5348B TR is suitable for a wide range of applications. These include rectification and protection of low voltage supply circuits, shunt regulator, output protection circuits and temperature measurement devices.
In the audio/screen industry, these diodes are used for signal rectification and voltage regulation. They are also suitable for signal conditioning for signal clamping, signal limiting, and voltage offset. Furthermore, these diodes have a very low reverse leakage current, which makes them suited for DC current sensing, signal isolation, and low voltage load switching.
In power amplifiers, the CZ5348B TR can be used as a switch and protector between the input and output stages. They can be used to protect the speaker from high voltage when they can handle the extreme current levels. In computers and other sensitive electronics, these diodes are used to prevent power surges and to protect the circuits from shorts and overloads.
Finally, the CZ5348B TR are used as temperature sensors. These diodes display a temperature dependency on their Zener voltage and can be used for accurate thermal control of time- critical components and devices, such as microcontrollers and embedded systems.
Conclusion
In conclusion, the CZ5348B TR are 9.1 Volt Zener Diodes that are suitable for rectification and protection, voltage regulation, temperature sensing, signal conditioning, and much more. With a dependable operating temperature, low reverse leakage current, and miniaturized design, these diodes can be a valuable component for any low voltage circuit.