LH1556AAC

Series:	LH1556
Packaging:	Tube
Part Status:	Active
Mounting Type:	Surface Mount
Circuit:	SPST-NO (1 Form A) x 2
Output Type:	AC, DC
Voltage - Input:	1.26VDC
Voltage - Load:	0V ~ 350V
Load Current:	120mA
On-State Resistance (Max):	28 Ohms
Termination Style:	Gull Wing
Package / Case:	8-SMD (0.300", 7.62mm)
Supplier Device Package:	8-SMD

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Solid State Relays

Solid state relays (SSRs) are an electronic switching device that can control the on/off state of the contact output. Instead of using a moving contact to open and close the connection, solid state relays (SSRs) use a pulse of electrical current to trigger a semiconductor within the enclosed device. These SSRs provide a wide range of control capabilities including very fast switching, full integration in an automation network, long-term reliability, and safety features.The LH1556AAC is a solid state relay (SSR) designed for applications requiring a fast, reliable, user-friendly control solution. It has a unique design with an iconic geometric shape and is equipped with several features that make it the perfect choice for both high-volume industrial applications and commercial automation systems. Its features include a reliable switching mechanism, a wide range of operating voltage and current ratings, and various output configurations.When used in high voltage applications, the LH1556AAC is exceptionally reliable and guarantees error-free operation even in the most demanding conditions. Its switching mechanism is based on the use of an optocoupler to ensure complete isolation between the input and output sections, making it extremely safe for personnel in close proximity of the relay. The internal dynamic components are also thermally protected and designed to ensure lasting performance.The LH1556AAC series offers various input and output features that make it suitable for a wide range of applications. These include AC input ratings from 24VAC to 500VAC, voltage outputs ranging from 24V to 480VAC, and current ratings ranging from 25mA to 30A. These features also allow for the use of the LH1556AAC in both AC and DC applications.The working principle of the LH1556AAC is simple and consists of two stages. Firstly, energy is supplied to the SSR in the form of an input voltage and current. This energy is then used to activate the internal pulse-width modulation (PWM) circuit, which monitors the input voltage and current and triggers a semiconductor switch when a specific threshold is reached. When activated, the semiconductor switch creates a closed loop that enables current to flow freely from the input to the output side of the SSR.The LH1556AAC is a reliable and user-friendly solid-state relay suitable for many industrial and commercial automation applications. It has several features that make it an ideal choice for applications that require fast, reliable, and easy-to-use switching solutions. With its wide range of input and output ratings, it is designed to offer error-free operation even in the most extreme conditions.

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