PS7804-1A-A Relays

Series:	PS, OCMOS
Packaging:	Cut Strip
Part Status:	Obsolete
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, DC
Voltage - Input:	1.1VDC
Voltage - Load:	0V ~ 60V
Load Current:	400mA
On-State Resistance (Max):	1.5 Ohms
Termination Style:	SMD (SMT) Tab
Package / Case:	4-SMD (0.165", 4.20mm)
Supplier Device Package:	4-Ultra Small Flatlead

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Solid State Relays (SSR) are electrical devices that are used to control the switching on or off of high voltage AC and DC loads. They are reliable and fast to switch on, which makes them ideal for a wide variety of industrial applications.The PS7804-1A-A ( PS7804-1A-A ) is a single-phase, Silicon Controlled Rectifier (SCR)-based, dual-in-line solid state relay. It is designed for controlling high-side AC and DC loads in applications up to 6A from 24VAC to 440VAC. The PS7804-1A-A is housed in a plastic DIP (dual in-line package) module with screw terminals, making it easy to install and integrate into industrial control systems.The working principle of a solid state relay is based on its semiconductor properties. The output device consists of a silicon-controlled rectifier ( SCR ) or a triac (Thyristor with alternate current) that is triggered by an opto-isolator which is the switching device of the relay. When energized, the opto-isolator will switch on the SCR/Triac which, in turn, will close the relay circuit. The control circuit is isolated from the loads, ensuring safety and preventing electrical noise interference.The main application field of the PS7804-1A-A is in industrial automation, HVAC (Heating, Ventilation, and Air Conditioning) systems, electromechanical solenoids, industrial process controllers/monitors, and motor drives. It is also well-suited for high frequency switching applications, such as temperature and pressure control, as well as for controlling the on/off switching of AC and DC devices.The key features of the PS7804-1A-A are:- High-side switching with no external power supply required- High-voltage isolation for maximum safety- Quick switching time (<1ms)- Low power dissipation- Low input current (<5mA)- High maximum current rating (6A)- Air or oil cooledThe PS7804-1A-A can also be used in applications requiring a combination of high-voltage and high-current control, such as those found in stepper motors. This combination makes it suitable for controlling large, high-inertia loads with reduced power losses.In summary, the PS7804-1A-A is an ideal choice for industrial applications that require a high-side switching solution with quick reaction times, high-voltage isolation and low power dissipation. Its combination of features makes it well-suited for controlling high-inertia loads, as well as for more common applications such as HVAC systems and process controllers/monitors.

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