TS420-400B-TR

Current - Hold (Ih) (Max):	5mA
Base Part Number:	TS420
Supplier Device Package:	DPAK
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
SCR Type:	Sensitive Gate
Current - Non Rep. Surge 50, 60Hz (Itsm):	30A, 33A
Current - Off State (Max):	5µA
Series:	--
Current - On State (It (RMS)) (Max):	4A
Current - On State (It (AV)) (Max):	2.5A
Voltage - On State (Vtm) (Max):	1.6V
Current - Gate Trigger (Igt) (Max):	200µA
Voltage - Gate Trigger (Vgt) (Max):	800mV
Voltage - Off State:	400V
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Thyristors - SCRs

Thyristors are semiconductor electronic components that are essentially four-layer diodes with three junctions, and are usually triggered by voltage in the forward direction. They can store and control high currents and voltages, and can be used either as switching devices or as regulators of power in many applications.The TS420-400B-TR is a specific type of thyristor known as a Silicon Controlled Rectifier, or SCR. SCRs have three distinct terminals, an anode and a cathode as with diodes, and a control gate allowing control of conduction. They are used in many commercial and industrial applications, including motor control and lighting control.The TS420-400B-TR is an SCR suitable for wide range of applications. It has a maximum repetition rate of 400V, maximum current of 42A, and maximum surge current of 420A. This makes it suitable for medium-sized motors and other apparatus that require medium-grade switching.When an SCR is connected in the circuit, it can be triggered into conduction in one direction by supplying a positive voltage to the gate terminal compared to the anode. Once triggered into conduction, the gate terminal need not have a potential difference maintained, and thus the flow of current through the SCR will remain until the current through it drops below a certain point. At this time, the current will cease and the thyristor will return to the inactive, non-conductive state until a control signal is applied again to the gate terminal.Because of its fast switching times, the TS420-400B-TR SCR can be used in different applications, such as motor control, lighting control, and other power supply controls. It offers good reliability even at higher temperature, which makes it ideal for applications in remote, difficult places, where safety is a major concern.In motor control applications, SCRs can be used to regulate the speed of the motor in both forward and reverse directions using a voltage control design. This can be implemented by driving the SCR\'s gate with a pulse-width modulated signal, whose duty cycle (ratio of the width of the pulse to the total period of the waveform), determines the voltage and thus the speed of the motor.In lighting control applications, SCRs can be used to regulate the light intensity of the lamp. It can be done by driving the SCR\'s gate with a pulse-width modulated signal, whose duty cycle (ratio of the width of the pulse to the total period of the waveform), determines the voltage, and thus the current flow through the lamp, and consequently the intensity of the light.Because of its medium current ratings, the TS420-400B-TR SCR can be used in a variety of other applications, such as starting and reversing of motors, regulation of temperature, and generation of unidirectional pulses in low power radio systems. By carefully choosing the appropriate components and designing the circuit correctly, the TS420-400B-TR SCR can be employed in almost any medium-current power control application.The TS420-400B-TR SCR is a compact component that can be used for a variety of applications, offering good performance, reliability, and safety. Its wide range of specified values enables designers to use it in a variety of systems with minimal modifications, making it an ideal choice for many power control applications.

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