EL3051

Current - On State (It (RMS)) (Max):	100mA
Approvals:	CSA, DEMKO, FIMKO, NEMKO, SEMKO, UL
Supplier Device Package:	6-DIP
Package / Case:	6-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 100°C
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.18V
Turn On Time:	--
Current - Hold (Ih):	250µA (Typ)
Series:	--
Current - LED Trigger (Ift) (Max):	15mA
Static dV/dt (Min):	1kV/µs
Voltage - Off State:	600V
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Zero Crossing Circuit:	No
Output Type:	Triac
Part Status:	Active
Packaging:	Tube

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EL3051 Application Field and Working Principle

Introduction

The EL3051 is a advancedelectronic Triac based latching optical isolator with an output SCR for the applications in AC operatedmedical/industrial automation control, lighting and remote control circuits. It has a wide voltage range of 1 to 2.2V that remain stable while providing a standby current of 0.10mA while being activated and in operation. The electrical rating of this opto-isolator is 4A.

Application Field

The EL3051 has a broad range of applications in the field of automation control and industrial lighting control. It is suitable for both medical and industrial applications. The optoisolator ensures that current will flow in one direction while maintaining isolation between the two points. Thus, it can be used to control AC or DC voltages in various applications such as controlling light sources, controlling temperature in medical equipment and controlling remote control circuits.

Working Principle

The EL3051 optoisolator will work on the principle of a Triac with an output SCR. It involves two principle IC\'s, namely a Triac and a SCR. A Triac is a three-pin power switch that will switch ON or OFF when triggered. The Triac is responsible for driving the current in the circuit. The output SCR is a silicon-controlled rectifier or a thyristor which is triggered by the Triac. The optoisolator will create an electrical isolation barrier between the two points and the SCR will cause a fork of low current to flow across it for the purpose of providing isolation.The current provided by the Triac will pass through an infrared LED. The SCR will be triggered by the Triac when it detects signals from the infrared LED. The Triac will activate the SCR and hence the output current flow in the circuit will increase. The activated SCR will remain in the ON state as long as current flows across it, until it is reset by Triac. The optoisolator will provide protection against short circuit and reverse current.

Summary

The EL3051 optoisolator is a highly reliable and advanced latching optical isolator used in AC operated industrial/medical automation control, lighting control and remote control circuits. The electrical rating of the optoisolator is 4A. It is based on the working principle of a Triac with an output SCR which will create an electrical isolation barrier between the two points and the SCR will cause a fork of low current to flow across it for the purpose of providing isolation. Moreover, the optoisolator provides protection against short circuit and reverse current.

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