PRODUCT FAMILY DATA SHEET

Cree LED / 4400 Silicon Drive / Durham, NC 27703 USA / +1.919.313.5330 / www.cree-led.com

© 2015-2021 Cree LED. The information in this document is subject to change without notice. Cree® and the Cree logo are registered trademarks, and

the Cree LED logo is a trademark, of Wolfspeed, Inc. XLamp® and EasyWhite® are registered trademarks of Cree LED. UL® and the UL logo are registered

trademarks of UL LLC.

CLD-DS123

REV 10A

1

XLamp® CXB2540 LED

PRODUCT DESCRIPTION

The XLamp® CXB2540 LED Array is a

member of the second generation of the

CXA family that delivers up to 30% higher

efficacy and up to 20% higher lumens than

the first generation in the same LES. The

higher performance second generation

CXA LED Arrays provide a drop-in

performance upgrade to existing CXA LED

designs to shorten product development

time. In addition, the CXB LEDs also

allow lighting manufacturers to achieve

the same or better performance with a

smaller LES, enabling a smaller, more

impactful luminaire. Available in 2‑step,

3-step and 5-step EasyWhite® bins and

2‑step and 3‑step Premium Color bins, the

CXB2540 LED delivers high lumen output

and high efficacy in a single, easy‑to‑use

package that eliminates the need for reflow

soldering.

The CX Family LED Design Guide provides

basic information on the requirements

to use the CXB2540 LED successfully in

luminaire designs.

FEATURES

• 19-mm optical source

• Mechanical and optical design

consistent with other CXA25 and

CXB25 LEDs

• Available in 70‑, 80‑, 90‑ and

95‑minimum CRI options

• EasyWhite® 2‑, 3‑ and 5‑step binning

• Premium Color 2- and 3-step binning

• Forward voltage option: 36-V class

• 85 °C binning and characterization

• Extremely uniform color over viewing

angle

• Top-side solder connections

• Thermocouple attach point

• NEMA SSL‑3 2011 standard flux bins

• RoHS and REACh compliant

• UL® recognized component (E349212)

TABLE OF CONTENTS

Characteristics ............................................... 2

Operating Limits............................................. 2

Flux Characteristics, EasyWhite® Order

Codes and Bins .............................................. 3

Flux Characteristics, Premium Color Order

Codes and Bins .............................................. 6

Relative Spectral Power Distribution ............ 7

Relative Spectral Power Distribution,

Premium Color ............................................... 7

Electrical Characteristics............................... 8

Relative Luminous Flux.................................. 9

Typical Spatial Distribution.......................... 10

Performance Groups - Brightness .............. 10

Performance Groups - Chromaticity........... 11

Premium Color Performance Groups -

Chromaticity ................................................. 12

EasyWhite® Bins Plotted on the 1931 CIE

Color Space .................................................. 13

Premium Color Bins Plotted on the 1931

CIE Color Space............................................ 14

Bin and Order Code Formats....................... 16

Mechanical Dimensions .............................. 16

Thermal Design............................................ 17

Notes ............................................................ 18

Packaging..................................................... 19