Voltage - Forward (Vf) (Typ):	2.1V
Height (Max):	4.50mm
Size / Dimension:	--
Supplier Device Package:	T-1
Package / Case:	Radial
Features:	--
Wavelength - Peak:	568nm
Wavelength - Dominant:	--
Mounting Type:	Through Hole
Viewing Angle:	30°
Current - Test:	20mA
Series:	--
Lens Style/Size:	Round with Domed Top, 3mm (T-1), 3.00mm
Millicandela Rating:	50mcd
Lens Transparency:	Clear
Lens Color:	Green
Color:	Green
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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LED Indication - Discrete

The Three-Segment Tri-Color (3SGT) LED indicator is a type of discrete LED indicator designed for visual signaling in applications that demand higher visibility. Utilizing its distinct three-segment structure, it can be used to display three different colors of light to indicate different levels of intensity and other visual information. In this article, we will explore the applications of this type of indicator and the fundamental operations that power it.

Applications of 3SGT LED Indicators

Though 3SGT LED indicators may be used for a variety of purposes, they are mainly used for signaling in highly visible industrial applications such as traffic lights, warning signals and automotive lighting. They are popularly used in such areas due to their ability to simultaneously project three distinct colors, making it easier to distinguish patterns and display levels of intensity. Similarly, they are used in airplane interiors as a form of visual signalling. Apart from industry applications, 3SGT LED indicators may also be found in consumer displays such as digital watches, digital clocks, microwaves and various other small electronic devices. These LEDs are ideal for small electronic displays due to their low power consumption.

Working Principle of 3SGT LED Indicators

3SGT LED indicators are composed of three light emitting diodes (LEDs) arranged in a single housing. Each individual LED in the indicator is responsible for producing its own color - either red, green or yellow. The power supplied to each of the LEDs is individually controlled using a transistor circuit. When a positive voltage is applied to the transistor switch circuit, the corresponding LED will emit light.The transistor circuit is usually configured to the "common anode" configuration. In this configuration, each LED is connected to its own anode terminal and all three anodes are connected to a common positive terminal. One advantage of this configuration is that each of the LEDs may be switched off or on by connecting or disconnecting their respective anodes to common positive terminal.

Conclusion

3SGT LED indicators are designed to meet the visual signaling needs of industrial and consumer applications. They are composed of three individual LEDs, arranged in a single housing. The LEDs are powered by a transistor circuit and can simultaneously project three distinct colors for making patterns or displaying levels of intensity. Due to their versatility and low power consumption, 3SGT LED indicators are widely used in various industries, from traffic lights to airplane interiors. They are also found in consumer displays such as digital watches and microwaves.

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