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Infrared LED



LED emitting collimated light for optical encoder

The L9437 is an infrared LED developed for optical encoders. By improving the aspherical lens used with the previous type L8506, we have achieved an even more highly collimated beam of near infrared light. The lead pin of L9437 has no step piece that is usually formed at the lead base brazed to the package, thus eliminating the restriction in printed circuit board design.

-Collimated light beam
-Uniform light spot
-Narrow directivity: ±5°
-High-speed response: 40 MHz Typ.
-High reliability

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Package Metal
Package Category With lens
(high collimation)
Peak emission wavelength (min.) 840 nm
Peak emission wavelength (typ.) 870 nm
Peak emission wavelength (max.) 900 nm
Spectral half-width (typ.) 45 nm
Forward voltage (typ.) 1.5 V
Cutoff frequency (typ.) 40 MHz
Measurement condition Typ. Ta=25 ℃, unless otherwise noted

Emission Spectrum


Dimensional outline (unit: mm)


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