LED Failure & Installation Support

Queendom LEDs are engineered for 50,000+ hours of operation. When issues arise, use the correct guide based on your LED package type to resolve them quickly and safely.


LED Type Typical Applications Common Issues Support Guide
SMD LEDs
(Surface-Mount Device)		 PCB-mounted lighting, automotive interiors, consumer electronics, backlighting, high-density panels Solder joint failure, thermal stress cracking, ESD damage, color bin mismatch, non-lighting after reflow Open SMD Guide →
DIP LEDs
(Dual In-line Package)		 Industrial control panels, power indicators, DIY electronics, legacy equipment, educational kits Reversed polarity, missing current-limiting resistor, burnt-out leads, loose socket contact, dim output Open DIP Guide →
Infrared (IR) LEDs
(SMD or DIP)		 Security cameras, remote controls, proximity sensors, industrial automation Low radiant intensity, incorrect wavelength detection, driver circuit mismatch Open IR Guide →


Resource Description Format Download
LED Polarity Identification Visual guide for anode/cathode marking on SMD & DIP packages PDF Download
Recommended Solder Profiles Reflow curves for 0603, 0805, 1206, 3528, 5050 SMD LEDs PDF Download
Current-Limiting Calculator Interactive tool (Excel) to calculate resistor value by Vf and supply voltage XLSX Download
Need direct engineering support?
Provide your LED part number, application schematic, and photos of the issue. Our team responds within 4 business hours.