Current - On State (It (RMS)) (Max):	25A
Supplier Device Package:	TO-220AB
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	150°C (TJ)
SCR Type:	Standard Recovery
Current - Non Rep. Surge 50, 60Hz (Itsm):	300A, 330A
Current - Off State (Max):	2mA
Current - Hold (Ih) (Max):	60mA
Series:	--
Current - On State (It (AV)) (Max):	16A
Voltage - On State (Vtm) (Max):	1.5V
Current - Gate Trigger (Igt) (Max):	10mA
Voltage - Gate Trigger (Vgt) (Max):	1V
Voltage - Off State:	800V
Part Status:	Active
Packaging:	Bulk

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Thyristors - SCRs

Thyristors are an important class of semiconductor devices and have numerous applications. Their functionality is based on a four-layer structure, where two P-type materials are adjacent and separated by two N-type materials. They are generally characterized by their ability to control large amounts of power and their low voltage operation. The BT145-800RTQ is an example of a thyristor-based signal switch, and its application fields and working principles are discussed here.The BT145-800RTQ is a Zero Crossing Triac-Solid State Relay, a signal switch commonly used in industrial control applications. It is composed of a pair of Thyristors, or SCRs (Silicon Controlled Rectifiers), and is used for switch control and power switching applications. The two thyristors are connected in inverse polarity, which allows for generous ratings of AC current and switching speed.The BT145-800RTQ is used for applications ranging from motor control, to power switching and light dimming. It has a wide operating temperature range from -25°C to 75°C, making it a suitable device for controlling power to heaters or other temperature-sensitive loads. The BT145-800RTQ is also particularly suited to applications that require high power control, as it can switch up to 10A of RMS AC current.The BT145-800RTQ works according to the principle of zero-crossing control. This means that when the AC voltage waveform passes through zero and the polarity reverses, the signal switch is activated and provides the appropriate power to the target device. The signal switch is capable of switching AC voltages up to 800V RMS and is available in several power ratings, such as 25W and 40W.The BT145-800RTQ is a reliable and cost-effective signal switch that operates with high efficiency and low power consumption. It is suitable for use in a variety of industrial and commercial applications, such as motor control, power switching, and light dimming. It is a versatile device that is easy to install and operate, making it a reliable choice for powering a range of applications.

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