ultraviolet diode Seoul Viosys UVA 365nm CUN66B1B
Product Details Description
CUN66B1B is a high power ultraviolet diode intended for industrial 365nm UVA applications. It features 1000mW radiant power, 3.7V voltage, 500mA current, 45° view angle in compact 3.5 x 3.5 x 2.8mm SMD package. This makes the LED suitable for OEM that requires compact UV source for curing, printing, detection, UV flashlight, and custom module projects.
The ultraviolet diode is made for high current application and high power. The SMD design and low thermal resistance allow the engineer to develop efficient UV light engine using the LED when it is mounted on the corresponding aluminum or copper PCB. The 365nm wavelength is used when there is a need in strong fluorescence effect and reduced visible purple light.
In case of UV curing and printing the CUN66B1B is suitable for compact exposure heads, adhesive curing devices, resin response testing, coating machines, and small UV modules. In case of UV detection application the ultraviolet diode can be used for counterfeit detection, security inspection, fluorescence photography, crime inspection, oil leak detection, and UV torch. The final performance depends on target material, driver current, optical lens, working distance, PCB design, and thermal structure.
The 45° view angle provides for the product higher beam concentration compared to wide beam UV LEDs. It is useful when there is a need to use UV module to direct the light to a particular spot, inspection surface, adhesive line, or fluorescence target. It is different from the 120° wide-beam emitter that is suitable for wide area exposure.
For OEM and ODM projects the ultraviolet diode can be assembled on 12mm, 14mm, 16mm, 20mm, or other aluminum or copper PCB boards. Aluminum PCB is suitable for various standard UV module designs, while copper PCB can be used when there is a need for better thermal transfer. The LED can be provided as a separate component or as part of UV flashlight modules, curing modules, inspection lamps, and other custom UV LED modules.
The product is an UV LED component, not a lamp. A complete product includes constant current driver, PCB board, heat sink, optical lens or reflector, housing, wiring, switch, and safety design. Thermal management is particularly important for stable radiant power and long-time operation.
The CUN66B1B is a 365nm UVA ultraviolet diode, not UVC sterilization diode. It cannot be recommended for germicidal or disinfection applications. Do not look at the operating LED and avoid unnecessary skin and eyes contact. Use protective eyewear, shielding, and safe procedures during testing, assembling, and operation.
Specifications
Brand: Seoul Viosys
Model No.: CUN66B1B
Wavelength: 365nm
Size: 3.5 x 3.5 x 2.8mm
Voltage: 3.7V
Current: 500mA
Radiant Power: 1000mW
View Angle: 45°
PCB Options: Can be welded on 12mm, 14mm, 16mm, 20mm, or other aluminum or copper PCB board
Service: OEM ODM service for UV flashlight or other UV LED module
Features and Benefits
High power output
Designed for high current operation
Narrow viewing angle
Low thermal resistance
SMT type
Lead free product
RoHS compliant
Key Applications
UV Curing
Printing
Coating
Adhesive
Counterfeit Detection / Security
UV Torch
Fluorescence Photography
Dental Curing
Crime Inspection
Oil Leak Detection
FAQ
What is this ultraviolet diode used for?
This ultraviolet diode is used for UV curing, printing, coating, adhesive curing, counterfeit detection, security inspection, UV torch design, fluorescence photography, dental curing, crime inspection, and oil leak detection.
Is CUN66B1B a Seoul Viosys UV LED?
Yes. CUN66B1B is a Seoul Viosys 365nm UV LED diode in a compact SMD package.
What wavelength does this diode use?
The CUN66B1B uses a 365nm wavelength, which belongs to the UVA / near UV range.
What is the radiant power?
The radiant power is 1000mW at 500mA.
What is the forward voltage?
The forward voltage is 3.7V.
What is the view angle?
The view angle is 45°, which provides for narrow and directed UV output for curing, inspection, UV torch, and detection applications.
Can this diode be mounted on a PCB board?
Yes. It can be welded on 12mm, 14mm, 16mm, 20mm, or other aluminum or copper PCB boards according to the final product design.
Do you provide OEM or ODM UV LED modules?
Yes. OEM and ODM service is available for UV flashlight modules, UV curing modules, inspection lights, and customized UV LED assemblies.
Is this ultraviolet diode suitable for UV curing?
Yes. It is suitable for UV curing, adhesive curing, printing, coating, dental curing, and related UVA applications when the material responds to 365nm.
Can it be used for UV flashlights?
Yes. Its 365nm wavelength, 1000mW radiant power, and 45° beam angle make it suitable for directed UV flashlight and UV torch designs.
Is this diode suitable for sterilization?
No. This is a 365nm UVA diode, not a UVC sterilization diode. It should not be used or promoted for disinfection or germicidal applications.
Is it safe to look directly at the LED?
No. Do not look directly at the operating UV LED. Use protective eyewear, shielding, and safe working procedures during testing, assembly, and operation.































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