Current - Test:	20mA
Base Part Number:	HLMP-EL15
Height (Max):	8.91mm
Size / Dimension:	--
Supplier Device Package:	T-1 3/4
Package / Case:	Radial
Features:	--
Wavelength - Peak:	592nm
Wavelength - Dominant:	590nm
Mounting Type:	Through Hole
Viewing Angle:	15°
Series:	--
Voltage - Forward (Vf) (Typ):	2.02V
Lens Style/Size:	Round with Domed Top, 5mm (T-1 3/4), 5.00mm
Millicandela Rating:	2175mcd
Lens Transparency:	Clear
Lens Color:	Colorless
Color:	Amber
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Box (TB)

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Introduction

The HLMP-EL15-QT0DD LED indicator is categorized as a discrete LED indicator. It is designed to provide a visual indication of the status of electrical device states such as on/off, open/closed, high/low. The LED indicator consists of a LED package and an additional base that comprises a holder and a bezel.

Construction

The main component of the HLMP-EL15-QT0DD LED indicator is the LED package which comprises a lens and a LED die mounted on a printed circuit board (PCB) substrate. The LED package is mounted on a base that also comprises a holder and a bezel. The base is single molded of black plastic and has an o-ring, which provides an environmental seal. The base fits into either a round or an octagonal hole of 1.2" (30.3 mm) maximum size.

Function

The LED package emits visible optical energy in the form of light when energized through the PCB and the holder. This emitted light is visible through the lens, revealing the status of electrical devices. The LED die consists of a Gallium-Arsenide phosphide semiconductor material that emits light at a wavelength of approximately 618 nm when it is energized by an electrical current. The lens material is a transparent plastic that allows the light from the LED die to be visible.

Applications

The HLMP-EL15-QT0DD indicator can be used in a variety of applications, including domestic appliances, computers, medical electronics, automotive and general industrial control systems. The indicator is also suitable for use in hazardous locations due to its UL approved rating making it an ideal choice for many safety critical applications.

Working Principle

The HLMP-EL15-QT0DD LED indicator works on the principle of semiconductor light emitting diode (LED). This indicator consists of a Gallium-Arsenide phosphide semiconductor material that emits light when it is energized through the PCB and the holder. The lens material allows the light from the LED chip to be visible, providing a visual indication of the status of the electrical device. When the current flows in the forward direction, the electrons and holes recombine, generating light energy. The intensity of the light depends on the amount of current flowing through the chip.

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