PC4SD21YXPDH

Series:	--
Part Status:	Discontinued at Digi-Key
Output Type:	Triac
Zero Crossing Circuit:	Yes
Number of Channels:	1
Voltage - Isolation:	5000Vrms
Voltage - Off State:	800V
Static dV/dt (Min):	500V/µs
Current - LED Trigger (Ift) (Max):	3mA
Current - On State (It (RMS)) (Max):	100mA
Current - Hold (Ih):	3.5mA
Turn On Time:	50µs (Max)
Voltage - Forward (Vf) (Typ):	1.2V
Current - DC Forward (If) (Max):	50mA
Operating Temperature:	-30°C ~ 100°C
Approvals:	CSA, UR, VDE

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Introduction to PC4SD21YXPDH

PC4SD21YXPDH is a type of opto-isolator, more specifically a triac output and SCR output device. It is designed to provide electrical isolation from source and destination electronics, improving system stability and protection from electrical interference. It is commonly used in high-precision, low-cost devices where small form-factor and minimal power consumption are desired.

Application Fields

PC4SD21YXPDH is commonly used in the fields of industrial, automotive, biomedical, communications, and consumer electronics. In industrial applications, it is used to provide complete isolation in order to improve system stability, reduce the risk of electrical damage, and protect from electronic interference and noise. In automotive applications, it is also used for similar reasons, providing isolation between the electronic systems of a vehicle, such as between its radio and navigation systems. In biomedical applications, PC4SD21YXPDH is typically used for monitoring and controlling the transfer of electronic signals between physiological systems. For example, it is used for controlling the transfer of electronic signals to and from pacemakers and sensors, reducing the risk of electrical current interference and damage. It is also used in communications, providing complete electrical isolation for applications such as Ethernet ports, USB ports, and HDMI ports. Finally, it is also commonly used in consumer electronics, providing electrical isolation for a variety of products such as home theater systems, video game systems, and smart home devices.

Working Principle

PC4SD21YXPDH opto-isolators use triac and SCR output to provide electrical isolation. The triac and SCR output device is composed of two separate pathways, both with their own LED light source and photodiode. The LED light source emits light that is detected by the photodiode, which converts it into an electric signal. This electric signal is then used to control the transfer of electrical current and voltage between two different pathways, thereby providing electrical isolation.The device also uses capacitors and resistors to store and release electrical energy as necessary. This helps to reduce the risk of electrical interference and noise. Additionally, the device is made up of tiny components, allowing for a small form factor and low power consumption.

Conclusion

PC4SD21YXPDH is a type of opto-isolator, specifically a triac output and SCR output device. It is used in a variety of applications, from industrial and automotive applications to biomedical and consumer electronics. Its working principle involves the use of LED light sources and photodiodes to convert light into electric signals, and also involves the use of capacitors and resistors to control the transfer of electrical energy. It is small, efficient, and provides excellent electrical isolation.

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