LH1503AACTR

Series:	LH1503
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
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:	110mA
On-State Resistance (Max):	20 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 (SSR) are electronic switching devices used to control high-power circuits with low-power control signals. These relays utilize semiconductor switching devices such as thyristors or transistors to isolate the control circuit of an application from the load circuit, allowing much higher currents to be controlled than would be possible with a physical (mechanical) relay. In this article, we will discuss the LH1503AACTR solid state relay (SSR) and its application fields and working principles.The LH1503AACTR is a single-phase SSR with a zero-crossing output and an isolation voltage of up to 2500VAC. The device is designed for AC loads and is suitable for operation in environments with temperature ranges of -40 to +85°C.The main application fields for this SSR include electrical appliances, temperature control, lighting control, motor speed control, medical equipment, home appliance control, HVAC, and much more. The LH1503AACTR has a wide rang of input voltage form 4 to 32VDC.The LH1503AACTR is constructed with a zero-crossing output. This means that the output voltage is switched on (the load is energized) when the input voltage and the output voltage are both at the same level (zero voltage). This provides a fast and reliable switching of the output voltage.The switching action of the LH1503AACTR is triggered by an LED inside the unit. This LED is illuminated by current sourced from a separate control circuit. The LED current triggers the solid-state switching element, and the output is switched on or off depending on the state of the LED current.The LH1503AACTR is designed to provide high-level isolation between the input and output circuits. This is achieved by the use of an optoelectronic barrier which isolates the output from the input circuit. The barrier consists of a light source (LED) and a photosensor (photochemical effects). The LED emits a low level of radiation which is sensed by the photosensor, resulting in a DC switching element which is then used to control the load.In conclusion, the LH1503AACTR is a high-reliability, high-isolation solid state relay featuring zero-crossing switching, wide input voltage range, and wide temperature range. With its broad array of applications, it is suitable for use in many different industrial and consumer product applications.

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