S2S4

Series:	--
Packaging:	Tube
Part Status:	Obsolete
Output Type:	Triac
Zero Crossing Circuit:	Yes
Number of Channels:	1
Voltage - Isolation:	3750Vrms
Voltage - Off State:	600V
Static dV/dt (Min):	100V/µs
Current - LED Trigger (Ift) (Max):	10mA
Current - On State (It (RMS)) (Max):	50mA
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
Mounting Type:	Surface Mount
Package / Case:	4-SMD
Supplier Device Package:	4-SMD
Approvals:	CSA, UR

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Optoisolators-Triac, SCR Output

Optoisolators are a type of semiconductor devices used in applications requiring electrical isolation between two circuits. This device allows an input signal (from a microcontroller or other sources) to be isolated from an output signal (to control the power line) with the optocoupler acting as the isolator. This means that the input and output signals do not share a common ground and no current can flow between them. An optoisolator consists of a light source, usually an LED (light-emitting diode) or an infrared (IR) emitting diode. It is coupled to a photodector, such as a phototransistor, Darlington transistor, triac, SCR (silicon-controlled rectifier). The optoisolator prevents high voltages and/or currents from the load from flowing back into the controller circuits, thereby protecting the controller from damage.The S2S4 optoisolator is a high isolation voltage isolation device designed for applications involving high voltages and currents. It is a two-way AC switch with zero-crossing control for triac or SCR output. It provides the control circuit with 10 kV/μA isolation between the input and output. The internal optocoupler helps protect both the input and output circuits from each other. The S2S4 has an input voltage rating of 5V and a maximum SCR output voltage of 650V. It also has a maximum triac gate current of 25mA and it features short-circuit protection. It also has low standstill power consumption, making it an ideal choice for battery powered applications.The working principle of the S2S4 is based on controlling the gate current that is provided to the triac or SCR device. When a low voltage input signal is applied to the S2S4’s input, the optocoupler is activated and in turn, the gate current is increased, allowing the triac or SCR to turn on. When the input voltage signal reaches a zero level, the optocoupler is deactivated, reducing the gate current and turning the triac or SCR off. The S2S4 is a two-way AC switch with zero-crossing control for triac or SCR output. It is suitable for applications requiring high isolation between the input and output circuits such as industrial equipment, home appliances, dimmers, lightings, motor control, AC motor direction control as well as other areas where AC voltage and current control is needed.In conclusion, the S2S4 optoisolator is a high isolation voltage optoisolator designed for applications demanding a high degree of isolation between the input and output circuits. It is a popular choice for use in various industrial and home appliance applications as it provides superior performance and reliable operation due to its short-circuit protection and low standstill power consumption. The S2S4 optoisolator is an efficient and cost-effective way to add electrical isolation to a circuit as required.

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