COB LEDs


COB (Chip on Board) LEDs are compact LED modules with a bright light output. They consist of a small square or circular substrate which houses multiple LED chips/dies. These are covered with a phosphor coating. The most common colour of COB LED is white, however there a few more colours available as the technology develops.
How do they work?
COB LEDs have a base substrate, made of aluminium or ceramic, on which the LED dies are mounted. The actual LEDs provide a blue light. The number of LED dies and their typical luminous flux determines the “brightness” of the COB LED.
The layer of phosphor, which is an orangey-yellow colour, sits on top of the LED dies. The phosphor converts the blue LED dies into a white light. The type of phosphor creates different colour temperatures.
What is colour temperature?
Colour temperature describes the warmth or coolness of the LED light output. “Warm” COB LEDs offer a yellow-orange light output while “Cool” COB LEDs tend to be a bluer white. Colour temperature is measured in Kelvins with the symbol “K”.
What are the advantages of COB LEDs?
• Higher LED density than traditional LED mounting process
• No need for multiple soldering - just one package
• Bright light output
Uses for COB LEDs:
• General purpose lighting
• Downlights
• High Bay lighting
• Low Bay lighting
• Spotlights
• Solid State Lighting (SSL) replacements
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detalji proizvoda Proizvođač Typical Luminous Flux Luminous Intensity Optical Source Diameter Colour Temperature Radiant Flux Series Viewing Angle Colour Rendering LED Colours Forward Voltage Forward Current Dimensions
Vishay VLMS31J1K2-GS08, VLMS31 Red CoB LED Vishay - 11.2 mcd 2.4mm - - VLMS31 - - Red 2.6 V 10mA 3.5 x 2.8 x 1.75mm
Vishay VLMW1500-GS08, VLMW15 White CoB LED, 7000K Vishay - 180 mcd - 7000K - VLMW15 - - White 3.05 V 5mA 1 x 0.5 x 0.35mm
CHIPLED(SMD 0603-LED) YELLOW ULTRABR-e4 Vishay - - - - - - - - - - - -
Vishay VLMY30K2M1-GS08, VLMY30 Yellow CoB LED Vishay - 22.4 mcd 2.4mm - - VLMY30 - - Yellow 2.2 V 2mA 3.5 x 2.8 x 1.75mm
SMD-LED LC YELLOW PLCC2-e3 Vishay - - - - - - - - - - - -
SMD-LED RED PLCC2-e3 Vishay - - - - - - - - - - - -
Vishay VLMY334BACB-GS08, VLMY334 Yellow CoB LED Vishay - 4500 mcd 2.4mm - - VLMY334 - - Yellow 2.8 V 50mA 3 x 2.8 x 1.75mm
SMD-LED LC ORANGE PLCC2-e3 Vishay - - - - - - - - - - - -
Vishay VLMV3100-GS08, VLMV3100 Red CoB LED Vishay - 10 mcd 2.4mm - - VLMV3100 - - Red 3 V 10mA 3.5 x 2.8 x 1.75mm
SMD-LED LC ORANGE PLCC2-e3 Vishay - - - - - - - - - - - -
Vishay VLMY3100-GS08, VLMY310 Yellow CoB LED Vishay - 10 mcd 2.4mm - - VLMY310 - - Yellow 2.8 V 10mA 3 x 2.8 x 1.75mm
Vishay VLMS30J1L2-GS08, VLMS30 Red CoB LED Vishay - 18 mcd 2.4mm - - VLMS30 - - Red 2.2 V 2mA 3.5 x 2.8 x 1.75mm
CHIPLED(0402) BLUE ULTRABRIGHT -e4 Vishay - - - - - - - - - - - -
Vishay VLMR334BACB-GS08, VLMR334 Red CoB LED Vishay - 4500 mcd 2.4mm - - VLMR334 - - Red 2.8 V 50mA 3 x 2.8 x 1.75mm
CHIPLED(SMD 0603-LED) LC RED-e4 Vishay - - - - - - - - - - - -
DOME LENS GW YELLOW 6K REEL -e3 Vishay - - - - - - - - - - - -
Vishay VLMS30K1L2-GS08, VLMS30 Red CoB LED Vishay - 18 mcd 2.4mm - - VLMS30 - - Red 2.2 V 2mA 3.5 x 2.8 x 1.75mm
CHIPLED(SMD 0603-LED) RED ULTRABRIGHT-e4 Vishay - - - - - - - - - - - -
MINI SMD LC ORANGE -e3 Vishay - - - - - - - - - - - -
CHIPLED(SMD 0603-LED) BLUE U.BRIGHT-e4 Vishay - - - - - - - - - - - -
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