PAA191S

Series:	PAA, OptoMOS®
Packaging:	Tube
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A) x 2
Output Type:	AC, DC
Voltage - Input:	1.2VDC
Voltage - Load:	0V ~ 400V
Load Current:	250mA
On-State Resistance (Max):	8 Ohms
Termination Style:	Gull Wing
Package / Case:	8-SMD (0.300", 7.62mm)
Supplier Device Package:	8-SMD

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Introduction

Solid State Relays (SSRs) are the most common type of electronic relay. SSRs are composed of semiconductor-based switching components that control the movement of electricity from the power source to the loads. SSRs have several advantages over conventional relays, including high switching speed, low power loss, and longer life. The PAA191S is one type of SSR that is used to control the electricity flow to a load. This article will discuss the application field and the working principle of the PAA191S.

Application Fields

The PAA191S is a general-purpose SSR that can be used in a variety of applications. The primary applications for the PAA191S are AC load switching, motor starters, lighting, heating, and other electrical/electronic appliances. The PAA191S is ideal for applications that require high switching speed, low power loss, and long life.In AC load switching applications, the PAA191S can switch AC loads with a maximum current of 16A and a maximum voltage of 250VAC. This makes it suitable for a wide range of applications such as air conditioners, refrigerators, washing machines and other home appliances.The PAA191S is also suitable for motor starters as it can switch high currents quickly and efficiently. It is also suitable for lighting and heating applications, as it can switch up to 16A with a maximum breakdown voltage of 500V. In addition, the PAA191S has a high switching speed and a long life, making it perfect for applications that require frequent on/off operations.

Working Principle

The PAA191S utilizes an integrated circuit (IC) that consists of a bidirectional TRIAC and a control circuit. The control circuit is used to control the output of the TRIAC, while the TRIAC is responsible for switching the current on and off.The operation of the PAA191S begins when it is supplied with AC voltage. The control circuit detects this voltage and turns on the TRIAC. When the TRIAC is on, the current is allowed to flow to the load. When the current reaches a peak, the control circuit turns off the TRIAC, which cuts off the current and prevents any further current flow to the load.The PAA191S also has an overvoltage protection feature that prevents the TRIAC from being damaged by overloading. This is achieved by monitoring the voltage across the TRIAC and turning it off when it reaches a certain threshold.

Conclusion

The PAA191S is a general-purpose SSR that can be used for AC load switching, motor starters, lighting, and heating applications. It features high switching speed, low power loss, and long life, making it suitable for frequent on/off operations. The working principle of the PAA191S utilizes an integrated circuit consisting of a bidirectional TRIAC and a control circuit. This combination allows the PAA191S to switch AC loads quickly and efficiently, as well as provide overvoltage protection to prevent damage to the TRIAC.

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