TFZTR4.3B

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Not For New Designs
Voltage - Zener (Nom) (Vz):	4.3V
Tolerance:	--
Power - Max:	500mW
Operating Temperature:	-55°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	SC-90, SOD-323F
Supplier Device Package:	TUMD2
Base Part Number:	TFZ4V3

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TFZTR4.3B Application Field and Working Principle

The TFZTR4.3B diode is categorized as a zener diode, and is single ended. It is designed for general purpose use and is capable of providing reliable service for many applications. This diode can also be used for applications requiring a low-voltage, low-current zener diode. This diode is constructed from silicon or other semiconductor materials and is designed to operate as a voltage-regulating device when connected in reverse with respect to the forward direction. This device includes an avalanche break down feature, which helps secure the breakdown voltage, and ensures reliable operating conditions. When the applied reverse voltage is less than the breakdown voltage, no current will flow through the diode. But when the applied reverse voltage is greater than the breakdown voltage, current will start to flow through the diode. The supply voltage applied to the diode will determine the maximum current through the diode and the breakdown voltage level. It is also important to note that the reverse current will not generate power losses in the diode due to the use of a reverse-biased junction. Typically, these zener diodes are used for Voltage regulation, Current Regulation, Temperature compensation, and Crowbar protection applications. Voltage regulation is done by preventing the voltage from increasing too much from the zener breakdown voltage level. Current regulation is done by controlling the current flowing through the diode using an external resistor. Temperature compensation is used to limit or regulate the temperature in a system, or to keep the voltage level stable. Crowbar protection is a type of protection which maintains the voltage and current in a system at safe levels by discharging a current when it reaches a certain threshold. Another application of the TFZTR4.3B diode is in power supply design and circuit protection. Power supply designs generally include the use of a zener diode to regulate the output of the power supply. The Zener Diode provides the regulated output voltage, while the current support factor of the diode provides the necessary current to the output. Additionally, the Zener diode provides a Crowbar protection feature that prevents over-voltage conditions, and reduces the possibility of damage due to short circuit.The working principle of the TFZTR4.3B diode is relatively simple. The diode consists of an N-type layer and a P-type layer, and when connected in the forward direction, electrons from the N-type layer will cross the PN junction and then flow through the load. However, when connected in the reverse direction, the current will be reduced or stopped due to the presence of a Zener barrier at the junction. This Zener barrier is just a thin layer of insulation, which prevents large amounts of current from flowing through the device. The Zener voltage is the voltage that is always maintained across the PN junction when the applied voltage is greater than the breakdown voltage. In conclusion, the TFZTR4.3B diode is a single ended, low voltage, low current zener diode. It is used for general purpose applications such as voltage regulation, current regulation, temperature compensation and crowbar protection. Its working principle is based on the Zener Barrier effect that occurs at the PN junction when the applied voltage is greater than the breakdown voltage, which maintains a constant voltage across the junction. This diode is also commonly used in power supply designs and circuit protection to provide a regulated output voltage and a Crowbar protection feature.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description