uv light emitter 420nm
Product Details Description
The Seoul Viosys CUN26A1B is a high power uv light emitter developed for 420nm near-UV and violet-border applications that require broad beam coverage, compact SMD integration, and reliable module design. With 420nm wavelength, 1000mW radiant power, 3.5V voltage, 500mA current, and a 120° view angle, it is suitable for manufacturers developing UV curing tools, printing systems, coating equipment, inspection lamps, UV torch products, and custom UV LED modules.
This uv light emitter belongs to the Seoul Viosys Z5 NUV LED family. It is designed for high current operation and high power output applications, using a state-of-the-art SMD design and low thermal resistant material. The 3.5 x 3.5 x 2.0mm package supports compact layouts for PCB-mounted light engines, handheld devices, and industrial UV-related assemblies.
The 420nm wavelength sits near the violet side of the visible spectrum and is often selected for applications where visible violet output and near-UV response are useful together. Compared with 365nm or 385nm UV LEDs, 420nm normally provides stronger visible violet light, which can help operators see alignment, coverage area, and UV-reactive response more easily.
For curing and production applications, this uv light emitter can be integrated into UV curing modules, printing equipment, coating systems, adhesive curing tools, and dental curing devices when the material is responsive to 420nm output. Final performance depends on material chemistry, exposure distance, driver current, optical design, PCB temperature, and required dose.
The 120° wide beam makes the CUN26A1B suitable for designs that need broad coverage rather than a concentrated spot. It is different from 45° narrow-beam emitters that focus output into a smaller target area. This wide-beam profile can be useful for curing panels, printing paths, inspection lamps, fluorescence areas, and wide-angle UV torch modules.
For OEM and ODM projects, the CUN26A1B can be welded on 12mm, 14mm, 16mm, 20mm, or other aluminum or copper PCB boards. Aluminum PCB is suitable for many standard UV module designs, while copper PCB can be selected when stronger thermal transfer is required. The LED can be supplied as a component or assembled into UV flashlight modules, curing modules, inspection lamps, and other customized UV LED products.
Thermal design is important for a 500mA high-output LED. To support stable radiant output and long-term performance, use a suitable constant-current driver, proper soldering process, appropriate PCB material, and enough heat dissipation. Engineers should verify board temperature, radiant output, beam spread, and application performance inside the final product before mass production.
This product is a UV LED component, not a complete finished lamp. A finished device should include a driver circuit, PCB board, heat sink, housing, optical lens or reflector, wiring, switch, and safety structure. The CUN26A1B is a 420nm near-UV / violet-border light source, not a UVC sterilization LED, and should not be promoted for disinfection or germicidal applications.
Do not look directly at the operating LED, and avoid unnecessary skin or eye exposure during testing and assembly. Use protective eyewear, shielding, warning labels, and safe working procedures in the final product design.
Specifications
Brand: Seoul Viosys
Model NO.: CUN26A1B
Wavelength: 420nm uv light emitter
Size: 3.5 x 3.5 x 2.0mm
Voltage: 3.5V
Current: 500mA
Radiant Power: 1000mW
View Angle: 120°
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
Low thermal resistance
SMT type
Lead free product
RoHS compliant
Z5 NUV LED package
Wide 120° output for broad module coverage
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 uv light emitter used for?
This uv light emitter 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 when the target material or application responds to 420nm output.
Is CUN26A1B a Seoul Viosys UV LED?
Yes. CUN26A1B is a Seoul Viosys Z5 NUV LED in a 3.5 x 3.5 x 2.0mm SMD package.
What wavelength does this LED use?
The CUN26A1B uses a 420nm wavelength. It is best described as a near-UV / violet-border light source.
What is the radiant power?
The radiant power is 1000mW.
What is the forward voltage?
The forward voltage is 3.5V.
What is the operating current?
The operating current is 500mA.
What is the package size?
The package size is 3.5 x 3.5 x 2.0mm.
What is the view angle?
The view angle is 120°, giving this uv light emitter a wide beam for curing, printing, inspection, UV torch, and detection applications.
Can this LED be mounted on PCB boards?
Yes. It can be welded on 12mm, 14mm, 16mm, 20mm, or other aluminum or copper PCB boards according to the final product structure.
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, dental curing modules, and customized UV LED assemblies.
Is this LED suitable for UV curing?
Yes. It can be used for curing, adhesive curing, printing, coating, dental curing, and related applications when the material responds to 420nm output.
Can it be used for UV flashlights?
Yes. Its 420nm wavelength, 1000mW radiant power, and 120° beam angle make it suitable for wide-angle UV flashlight and UV torch module designs.
Is this uv light emitter suitable for sterilization?
No. This is a 420nm near-UV / violet-border LED, not a UVC sterilization LED. It should not be used or promoted for disinfection or germicidal applications.
Why is thermal design important?
The CUN26A1B operates at 500mA and produces high radiant output, so proper PCB material, heat sinking, current control, and thermal testing are important for stable module performance.
Is it safe to look directly at the LED?
No. Do not look directly at the operating LED. Use protective eyewear, shielding, and safe working procedures during testing, assembly, and operation.
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