1N5946CP/TR12

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Voltage - Zener (Nom) (Vz):	75V
Tolerance:	±2%
Power - Max:	1.5W
Impedance (Max) (Zzt):	140 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 56V
Voltage - Forward (Vf) (Max) @ If:	1.2V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Through Hole
Package / Case:	DO-204AL, DO-41, Axial
Supplier Device Package:	DO-204AL (DO-41)
Base Part Number:	1N5946

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1N5946CP/TR12 Application Field and Working Principle1N5946CP/TR12, a single Zener diode, is a component widely used in electronic circuits for voltage regulation, current sensing and overvoltage protection. As a voltage regulator, it enables protecting vulnerable circuits from damages of overvoltage and short areas in the power system, like line bias and power supply control. As a current sensing diode, it can detect the peak current in circuit and protect the downstream components from burned-out. As to overvoltage protection, it is capable of blocking excessive voltage from coming into a source while allowing the normal flow of current.Analysing its working principle, 1N5946CP/TR12 was made up of a p-type semiconductor and an n-type semiconductor which form a junction. If the applied voltage is more than the Zener voltage, the Zener diode turns on. This is due to the voltage across a Zener diode being approximately constant regardless of the current flowing through it in the reverse-biased state. Or put it simply, 1N5946CP/TR12 is opposite to the normal diode. It is able to pass current both ways when the voltage applied is higher than its threshold voltage. In this way, 1N5946CP/TR12 finds its use in controlling, regulating and protecting electronics, where precise control and monitoring are among the basic requirements for a steady and reliable output.In general, 1N5946CP/TR12 is mainly used for voltage regulation, current sensing and overvoltage protection. For voltage regulation, it is designed to keep the output voltage stable in an acceptable range. This could benefit the circuit protection. For current sensing, this device helps to detect the peak currents in a circuit and trigger off the protection system whenever the peak current exceeds certain limits. For overvoltage protection, this device can prevent transients and high voltage spikes from entering into a source. This is achieved by allowing a limited amount of current while blocking excessive voltage.Apart from the abovementioned applications, 1N5946CP/TR12 can also be used in other circuits such as bridge rectifier, logic gates, power inverter, relay switches and controllers. Taking inverter as an example, 1N5946CP/TR12 can be used between the load and the input power supply. With this device installed, when the output voltage is more than the Zener voltage, the Zener diode starts conducting, preventing the input voltage from increasing further and thereby protecting the load from overvoltage and short circuit.In conclusion, 1N5946CP/TR12 is a single Zener diode designed for a variety of applications such as voltage regulation, current sensing and overvoltage protection. It makes use of a p-type semiconductor and an n-type semiconductor, opposing to the normal diode and capable of conducting both ways when the voltage applied is higher than the Zener voltage. It is widely used in bridge rectifier, logic gates, power inverter, relay switches and controllers, offering excellent performance and reliability in operation.

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