PS7122L-1A-A

Series:	PS, OCMOS
Packaging:	Tube
Part Status:	Obsolete
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A)
Output Type:	AC, DC
Voltage - Input:	1.2VDC
Voltage - Load:	0V ~ 200V
Load Current:	200mA
On-State Resistance (Max):	5 Ohms
Termination Style:	Gull Wing
Package / Case:	6-SMD (0.300", 7.62mm)
Supplier Device Package:	6-DIP Gull Wing

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Solid State Relays

Solid State Relays (SSR) are electronic devices that are used as a contactless replacement for mechanical relays. SSRs are available in two configurations: those that use optically isolated gate drivers, and those that use insulated-gate drive. PS7122L-1A-A is one type of insulated-gate drive SSR.

Application Field

PS7122L-1A-A is suitable in applications such as machine tools, ATMs, home appliances, security systems, automotive instruments, and robotic manipulators. The advantages of using this SSR include a long operating life, higher speed switching, and lower power consumption. It is also known for its enhanced reliability, strong performance, and good compatibility. Moreover, its low cost and short delivery time make it an attractive choice for many industrial applications.

Working Principle

The working principle of PS7122L-1A-A is based on the physical properties of a metal oxide semiconductor (MOS) field-effect transistor (FET). It is a 4-pin device furnished in a robust integrated circuit package. The main components of the device are a MOSFET switch, an RC snubber circuit, a zero-crossing detector, an enable input, and common pin for the MOSFET source and switch ground. The current is switched by the MOSFET, whereas the RC snubber circuit is used to reduce the high voltage spikes. When the enable input of the PS7122L-1A-A is triggered, a voltage signal is delivered to the MOSFET gate, and the MOSFET switch is turned on. It stays on until the voltage of the MOSFET switch drops below a threshold value. The zero-crossing detector is used to detect when the voltage of the signal source crosses the threshold level, at which point the SSR turns off. In conclusion, PS7122L-1A-A is a type of solid state relay that belongs to the insulated-gate drive SSRs. It is suitable for applications such as machine tools, ATMs, security systems, automobile instruments, and robotic manipulators. Furthermore, the working principle of the device is based on the physical properties of a MOSFET, and it utilizes a MOSFET switch, an RC snubber circuit, a zero-crossing detector, and an enable input to switch currents.

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