DOWA Ultraviolet LED Diode TO18

Product Details Description

The xFxVL-1H211 is a DOWA ultraviolet led diode series developed for professional optical, sensing, and analytical equipment. It offers three wavelength options—310nm, 325nm, and 340nm—allowing engineers to select a UV output band according to the target material, detector response, measurement method, and system design.

This ultraviolet led diode uses a TO18 package with a hemi lens and φ9mm TO diameter. The package format is suitable for compact instrument layouts where a stable through-hole UV diode is preferred over loose chip emitters or larger UV lamp structures. The 24° view angle helps deliver controlled UV output into a defined optical area, making it useful for small chambers, sample holders, detector paths, and alignment-sensitive equipment.

The 310nm version provides 1.2mW radiant flux at 5V, the 325nm version provides 1.5mW radiant flux at 4.5V, and the 340nm version provides 1.3mW radiant flux at 4V. All versions operate at 40mA. This makes the series practical for applications that require selected ultraviolet wavelengths with low-current operation and predictable optical behavior.

For spectroscopy and fluorescence applications, this ultraviolet led diode can be used as an excitation source in laboratory instruments, material testing systems, inspection devices, and compact analysis modules. For chemical and biological analysis, the 310nm, 325nm, and 340nm options provide wavelength flexibility for different sample responses and measurement requirements. Final performance should be verified in the complete system, including optical filters, driver current, working distance, detector sensitivity, thermal path, and calibration method.

The xFxVL-1H211 should be positioned as a precision UV LED component rather than a general black light, UV strip, high-power curing lamp, or disinfection product. Clear positioning helps engineers and purchasing teams understand that this product is intended for wavelength-specific UV output in OEM instruments and custom optical assemblies.

For reliable operation, use a suitable current-controlled driver and avoid electrical overstress. UV LED performance can be influenced by heat, reverse voltage, handling, soldering conditions, lens contamination, and optical alignment. During product development, engineers should test the ultraviolet led diode inside the final device structure to confirm radiant output, temperature behavior, and application performance.

This product emits ultraviolet radiation. Do not look directly at the working diode, and do not expose skin or eyes to UV light. Use protective eyewear, shielding, warning labels, and controlled test procedures during evaluation, assembly, and operation.

Specifications

Brand: DOWA
Model NO.: xFxVL-1H211
Wavelength: 310nm / 325nm / 340nm
TO Type: TO18
Radiant Flux: 1.2mW at 310nm / 1.5mW at 325nm / 1.3mW at 340nm
Voltage: 5V at 310nm / 4.5V at 325nm / 4V at 340nm
Current: 40mA
View Angle: 24°
Lens Type: Hemi
TO Diameter: φ9mm

FAQ

What is this ultraviolet led diode used for?

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

Is this a DOWA UV LED diode?

Yes. This product is the DOWA xFxVL-1H211 ultraviolet LED diode series in a TO18 package.

What wavelength options are available?

The available wavelength options are 310nm, 325nm, and 340nm.

What is the radiant flux of each wavelength?

Radiant flux is 1.2mW at 310nm, 1.5mW at 325nm, and 1.3mW at 340nm.

What voltage does the diode use?

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

What is the operating current?

The operating current is 40mA.

What package does this product use?

It uses a TO18 package with a hemi lens and φ9mm TO diameter.

What is the view angle?

The view angle is 24°, which supports controlled UV output for compact optical paths and measurement areas.

Can it be used for UV curing?

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

Can it be used for sterilization?

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

Is it safe to look at the diode directly?

No. Do not look directly at the working UV diode or expose skin and eyes to UV radiation. Use protective eyewear, shielding, and warning labels during testing and integration.