DOWA 340nm UV LED TO39 Diode

Product Details Description

The xFxVL-1H331 is a DOWA UV LED series of LEDs developed for engineering applications requiring ultraviolet light emissions in TO39 packaging. The series offers 310nm, 325nm, and 340nm wavelength options, and allows selecting the appropriate UV band for optical testing, sensing, analysis, and instrumentation.

The 340nm uv led version can be used in projects where a small UVA / near UV light source is needed with narrow beams. The radiant flux provided is 1.0mW at 340nm wavelength, with 4V forward voltage, 40mA current and 6° view angle.

The TO39 hemispherical can type of packaging makes this product a robust metal-can structure with φ9mm diameter. Hemispherical lens allows shaping of the UV emission for the delivery of UV rays in optical paths, sample areas, detector areas or miniature test chambers. Instrument engineers will find this 340nm uv led convenient as compared to chip level loose emitter.

This product can be used in spectroscopy instrumentation, fluorescence excitation devices, chemical analysis devices, biological analysis instrumentation, optical sensing modules, material response testing and custom UV inspection devices. It can also be used for low power UV curing testing when target material is sensitive to the 340nm wavelength and the appropriate UV dose is proven in the final system.

The 310nm version produces 0.8mW radiant flux at 5V, the 325nm version produces 0.9mW at 4.5V and the 340nm uv led version produces 1.0mW at 4V. The three wavelength options all run at 40mA. This makes the xFxVL-1H331 series helpful for engineers who compare different wavelengths under the same packaging and current.

The final performance will depend on the complete optical and electrical design. It includes driver current accuracy, thermal path, lens alignment, working distance, target material, detector sensitivity, shielding and system calibration. For stable operation, the 340nm uv led must be used with an appropriate current controlled driver and correct handling.

This product should not be positioned as a universal black light strip, high power curing lamp or disinfection light source. It is more appropriate as DOWA TO39 UV LED product for optical, analytical and sensing applications. Correct positioning will help the page match B2B buyers looking for wavelength, package, radiant flux and view angle.

Safety precautions should be taken during testing and integration of this 340nm uv led. One should not look directly into the working diode and not expose skin or eyes to UV radiation. Use of protective eyewear, shielding, warning labels and controlled testing procedures during evaluation and equipment assembling is necessary.

Specifications

Brand: DOWA
Model No.: xFxVL-1H331
Wavelength: 310nm / 325nm / 340nm
TO Type: TO39
Radiant Flux: 0.8mW at 310nm / 0.9mW at 325nm / 1.0mW at 340nm
Voltage: 5V at 310nm / 4.5V at 325nm / 4V at 340nm
Current: 40mA
View Angle: 6°
Lens Type: Hemi
TO Diameter: φ9mm

FAQ

What is this 340nm uv led used for?

This 340nm uv led 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?

Yes. This product is a member of the DOWA xFxVL-1H331 series and uses a TO39 hemispherical can package.

What wavelength options are available?

The xFxVL-1H331 series offers 310nm, 325nm and 340nm wavelength options.

What is the radiant flux of the 340nm version?

The 340nm version offers 1.0mW radiant flux.

What is the forward voltage?

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

What current does this UV LED use?

The rated current is 40mA.

What package does this product use?

It uses a TO39 package with hemi lens and φ9mm TO diameter.

What is the beam angle?

This 340nm uv led has a narrow 6° view angle, making it suitable for focused optical paths and precise UV illumination.

Can it be used for UV curing?

It can be used only for selected low power material response or UV curing tests when the material is sensitive to 340nm and the final UV dose is verified. It is not a high power curing lamp.

Can it be used for disinfection?

This product should not be positioned as a disinfection light source. It is more suitable 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 not expose skin and eyes to UV radiation. Use protective eyewear, shielding and warning labels during testing and integration.