B574-2T

Series:	--
Packaging:	Bulk
Lead Free Status / RoHS Status:	--
Part Status:	Active
Structure:	Series Connection - SCR/Diode
Number of SCRs, Diodes:	1 SCR, 1 Diode
Voltage - Off State:	1.2kV
Voltage - Gate Trigger (Vgt) (Max):	2.5V
Current - Gate Trigger (Igt) (Max):	60mA
Current - Non Rep. Surge 50, 60Hz (Itsm):	250A @ 60Hz
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Chassis Mount
Package / Case:	Module

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Thyristors - SCRs - Modules are semiconductor devices that are used for controlling electric current and voltage in most modern electronic equipment and appliances. The B574-2T is an SCR (silicon controlled rectifier) module that provides reliable and inexpensive protection for many applications.The B574-2T consists of two isolated low voltage SCRs in one package, each with 4 amp of current capacity. It has a robust design, with electrostatic and transient protection features that make it ideal for use in a range of applications, including power converters, soft starters, electronic lights, home appliances, and automation systems.The B574-2T differs from other SCRs in its operating principle. Unlike traditional SCRs, it is triggered via pulses of current instead of conventional voltage signals, allowing it to be used in high-speed circuits where shorter switching times are desirable. Moreover, the module works reliably in both forward and reverse directions, and can be used in a range of applications that require the reliable current control of an SCR operation.The B574-2T can be used in a number of specific applications, depending on its configuration. It is typically used as a DC voltage regulator or as a motor speed controller in high power systems. It can also be used to provide soft starting for motors, as well as for current limitation in environmentally hostile settings. In addition, the B574-2T can be used as an interface between digital and analog systems, with the high-current capacity of its two SCRs allowing for the protection of both from damage.In its basic application, the B574-2T is triggered by a voltage pulse, typically between 1 and 5 volts. This pulse serves as a controlling "enable" signal, opening the two SCRs and allowing current to pass through them. Once enabled, these SCRs remain open until the power to the module is cut off, or if the "disable" signal is triggered by a 0-volt pulse.The B574-2T has the advantage of being bi-directional, meaning it can either increase or decrease current flow, depending on the direction of the voltage pulse. This feature makes it ideal for use as a DC voltage regulator, allowing it to reduce overloads while limiting voltage drops.The most common use of the B574-2T is in numerous security systems, such as camera systems and pool alarms. Here, the module provides protection against short-circuits, power surges, and other damaging voltage variations. The two SCRs, which remain closed in the absence of a voltage pulse, prevent any currentflow through the system until the voltage pulse is triggered. Once triggered, the module opens the two SCRs and allows current to flow through the cameras or other attached devices.The B574-2T is a versatile SCR module, and can be used in a range of applications that require reliable and safe current control. Its robust design and bi-directional operation make it suitable for use in a wide range of applications that require voltage regulation, motor speed control, and interface between digital and analog systems.

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