DOWA UVB LED Diode TO18 Flat

The xFxVL-1F111 is a DOWA UVB LED series with wavelengths of 310nm, 325nm, and 340nm, enabling engineers to choose the UV band based on the target material, the detector, test procedure or device construction.

The UVB LED has a TO18 flat can housing with a φ5mm TO diameter. In contrast to narrow-beam UV diodes with hemispherical lenses, the flat lens allows the 113° view angle. Thus, the product can be used for applications requiring wide UV coverage of a small sample area, optical chamber, sensor surface or test area.

At 5V, the 310nm version provides 1.2mW radiant flux, the 325nm version at 4.5V – 1.2mW radiant flux, and the 340nm version at 4V – 1.3mW radiant flux. All versions have a current of 40mA. Such parameters of this series can be used in compact UV systems requiring defined wavelength, stable low current operation and repeatable performance of components.

In spectroscopy and fluorescence applications, this DOWA UVB LED diode can serve as an excitation source in laboratory equipment, optical test modules, inspection devices and measurement systems. For chemical and biological analysis, the 310nm, 325nm, and 340nm wavelengths can provide flexibility depending on the sample response and test requirements. The final performance should be tested in the final system taking into account driver current, optical filters, working distance, detector sensitivity, thermal path and calibration method.

This UVB LED diode is best positioned as an OEM ultraviolet component and not as a consumer black light, LED strip, high power curing lamp or finished disinfection product. Clear positioning will allow engineers and purchasing teams to understand the purpose of the product as a wavelength-specific UV source in custom optical assemblies and instrument designs.

Due to the wide 113° output, this model is useful in cases where designers need broad local exposure, but not a focused UV spot. It can be used in sample-area illumination, multi-sensor layout, compact test fixture, fluorescence comparison tool and small UV response chamber.

For reliable operation, it is necessary to use a proper current-controlled driver and not to over-stress electrically. UV LED performance can be affected by heat, soldering conditions, reverse voltage, handling, optical contamination and installation alignment. The testing inside the final product structure is recommended before mass production.

This DOWA uvb led diode emits ultraviolet radiation. Do not look directly at the working diode and do not expose skin and eyes to UV light. Use protective eyewear, shielding, warning labels and control procedures in testing, assembly and operation.

Specifications

Brand: DOWA
Model No: xFxVL-1F111
Wavelength: 310nm / 325nm / 340nm
TO Type: TO18
Radiant Flux: 1.2mW at 310nm / 1.2mW at 325nm / 1.3mW at 340nm
Voltage: 5V at 310nm / 4.5V at 325nm / 4V at 340nm
Current: 40mA
View Angle: 113°
Lens Type: Flat
TO Diameter: φ5mm

FAQ

What is this uvb led diode used for?

This uvb led diode is used as a compact ultraviolet light source for spectroscopy, fluorescence excitation, optical sensing, chemical analysis, biological analysis, material testing, inspection instruments and OEM optical modules.

Is xFxVL-1F111 a DOWA UV LED diode?

Yes. The xFxVL-1F111 is a DOWA UV LED diode series with TO18 flat can housing.

What wavelength options are available?

This series consists of 310nm, 325nm, and 340nm wavelength options.

Which wavelength is UVB?

310nm falls into the UVB range. 325nm and 340nm versions are long wavelength ultraviolet options that are commonly used for different optical and analytical responses.

What is the radiant flux of each wavelength?

Radiant flux is 1.2mW at 310nm, 1.2mW at 325nm, and 1.3mW at 340nm.

What voltage does each wavelength use?

Voltage is 5V at 310nm, 4.5V at 325nm, and 4V at 340nm.

What is the operating current?

Operating current is 40mA.

What package does this product use?

This product uses TO18 package with flat lens and φ5mm TO diameter.

What is the view angle?

View angle is 113°, providing wider UV distribution than narrow-beam UV LED diode types.

Can this UVB LED diode be used for UV curing?

It can be used for selected low-power material response or UV curing tests if the material responds to 310nm, 325nm or 340nm. It is not a high-power curing lamp.

Can it be used for phototherapy device development?

310nm UVB may be considered in phototherapy-related equipment development, but medical devices require strict optical, electrical, safety and regulatory validation before use.

Is this suitable for disinfection?

This product should not be promoted as a disinfection light source. It is better positioned for spectroscopy, sensing, fluorescence excitation and analytical equipment.

Is it safe to view directly?

No. Do not look directly at the working UV LED and do not expose skin and eyes to UV radiation. Use protective eyewear, shielding, warning labels and safe test procedures.