Page 74 - Kingbright 2022-2023 catalog

TECHNICAL NOTES

APPLICATION NOTES
General Notes Recommended Wave Soldering Profiles
1. We recommend manual soldering operations only for repair and For Kingbright Through-Hole Products
rework purposes. The soldering iron should be temperature-controlled 1. Lead-Free Wave Soldering Profile
to avoid damaging the component. The maximum soldering
temperature is 300°C for Pb-Sn solder and 350°C for lead-free
solder for normal lamps and displays. For blue (typ.:465nm), green
(typ.:525nm), and all white LEDs, the maximum soldering iron
temperature is 280°C. Do not place the soldering iron on the
component for more than 3 seconds.

Notes:
1.Recommend pre-heat temperature of 105°C or less (as measured with a thermocouple attached to the
LED pins) prior to immersion in the solder wave with a maximum solder bath temperature of 260°C.
2. The tip of the soldering iron should never touch the epoxy lens. 2.Peak wave soldering temperature between 245°C ~ 255°C for 3 sec (5 sec max).
3.Do not apply stress to the epoxy resin while the temperature is above 85°C.
3. Do not apply stress to the leads when the component is heated above 4.Fixtures should not incur stress on the component when mounting and during soldering process.
5.SAC 305 solder alloy is recommended.
85°C, otherwise internal wire bonds may be damaged. 6.No more than one wave soldering pass.
4. Through-Hole LEDs are incompatible with reflow soldering. 7.During wave soldering, the PCB top-surface temperature should be kept below 105°C.
5. If the LED will undergo multiple soldering passes or face other 2. Wave Soldering Profile With Pb-Sn Solder
processes where the part may be subjected to intense heat, please
check with Kingbright for compatibility.
6. SMD products must be mounted according to specified soldering pad
patterns. Refer to the product datasheet for details. Solder paste must
be evenly applied to each soldering pad to insure proper bonding and
positioning of the component.

7. After soldering, allow at least three minutes for the component to cool
down to room temperature before further operations.
8. Recommended PCB pin hole diameters for display products are listed
below :
Square pin type :Ф1mm Recommended Reflow Soldering Profiles For
Round pin type : 2 x pin diameters Kingbright SMD Products
1. Lead-Free Reflow Soldering Profile

9. Data subject to change without notice. For additional detail of
application notes, product information, and disclaimers, please visit Notes:
1. Don't cause stress to the LEDs while it is exposed to high temperature.
our website at www.KingbrightUSA.com/ApplicationNotes/ 2. The maximum number of reflow soldering passes is 2 times.
72 www.KingbrightUSA.com