registered trademarks of Cree, Inc.

10

xlamp mC-e leds

notes

lumen maintenance Projections

Cree now uses standardized IeS Lm-80-08 and Tm-21-11 methods for collecting long-term data and extrapolating LeD

lumen maintenance. For information on the specific LM-80 data sets available for this LED, refer to the public LM-80

results document at www.cree.com/xlamp_app_notes/Lm80_results.

moisture sensitivity

XLamp mC-e LeDs are shipped in sealed, moisture-barrier

bags (mBB) designed for long shelf life. If XLamp mC-e LeDs

are exposed to moist environments after opening the mBB

packaging but before soldering, damage to the LeD may

occur during the soldering operation. The derating table

at right defines the maximum exposure time (in days) for

an XLamp mC-e LeD in the listed humidity and temperature conditions. LeDs with exposure time longer than the time

specified below must be baked according to the baking conditions listed here.

Cree recommends keeping XLamp LeDs in their sealed moisture-barrier packaging until immediately prior to use. Cree

also recommends returning any unused LeDs to the resealable moisture-barrier bag and closing the bag immediately

after use.

baking conditions

It is not necessary to bake all XLamp mC-e LeDs. only the LeDs that meet all of the following criteria must be baked:

•

LeDs that have been removed from the original mBB packaging.

•

LeDs that have been exposed to a humid environment longer than listed in the moisture Sensitivity section above.

•

LeDs that have not been soldered.

LeDs should be baked at 80 ºC for 24 hours. LeDs may be baked on the original reels. Remove LeDs from mBB packaging

before baking. Do not bake parts at temperatures higher than 80 ºC. This baking operation resets the exposure time as

defined in the Moisture Sensitivity section above.

storage conditions

XLamp mC-e LeDs that have been removed from original mBB packaging but not soldered yet should be stored in a

room or cabinet that will maintain an atmosphere of 25 ± 5 ºC and no greater than 10% RH. For LeDs stored in these

conditions, storage time does not add to exposure time as defined in the above Moisture Sensitivity section.

rohs compliance

The levels of RoHS restricted materials in this product are below the maximum concentration values (also referred to

as the threshold limits) permitted for such substances, or are used in an exempted application, in accordance with eU

Directive 2011/65/EC (RoHS2), as implemented January 2, 2013. RoHS Declarations for this product can be obtained

from your Cree representative or from the product ecology section of www.cree.com.

temperature

maximum Percent relative humidity

30%

40%

50%

60%

70%

80%

90%

30 ºC

9

5

4

3

1

1

1

25 ºC

12

7

5

4

2

1

1

20 ºC

17

9

7

6

2

2

1