Analysis Of Luminus High-Power UVA UV LED Series 365–405nm Wavelength Range And Industrial Curing Selection Guide
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I. Applications and Classification of UV Wavelengths
Ultraviolet (UV) light is categorized into three wavelength bands, each with distinct mechanisms of action:
- UV-C (200–280 nm): Biomedical applications, anti-counterfeiting verification, air purification, vacuuming/dust-mite removal, drinking water purification, and kitchen fume purification.
- UV-B (280–315 nm): Primarily used for treating skin conditions, regulating higher-level neurological functions, and wound disinfection/anti-inflammatory treatment; also used for UV adhesive bonding in medical devices.
- UV-A (315–410 nm): Adhesive curing (medical, instrumentation), coating curing (furniture, automotive), ink curing (packaging/printing), banknote anti-counterfeiting verification, photopolymer resin hardening, insect attraction/extermination, electronics assembly, and photocatalytic purification.
II. Advantages of UV LEDs
- Differences from traditional curing light sources
-- Traditional UV fluorescent lamps may appear very bright, but they generate significant heat and have a broad spectrum; only a tiny fraction of the light is effective for curing, while the majority consists of stray light. The generated heat is not only useless for curing but can also cause thermal deformation in the workpiece and inflict serious eye damage on operators.
-- UV LEDs emit high-purity, monochromatic UV light and function as a "cold light source," preventing workpiece deformation. Their highly concentrated energy delivers performance equivalent to high-pressure mercury lamps with dozens of times the optical power, significantly reducing curing times.
- Characteristics superior to traditional curing light sources
-- Long service life exceeding 15,000 hours (continuous operation);
-- Low power consumption; the light only needs to be activated during the irradiation process;
-- Compact size, facilitating the design of highly integrated equipment or standalone desktop systems;
-- Energy-efficient and eco-friendly; UV LED curing equipment generates minimal heat, is durable (not easily broken), and contains no mercury.
- Application Advantages
--The UV-LED system features a specialized condensing lens assembly that highly concentrates energy at the curing point, enhancing UV adhesive curing efficiency. Multiple units can be used simultaneously to irradiate larger areas, maximizing throughput.
--Utilizes integrated CPU control; digital circuitry allows for the selection of manual or automatic operation modes and precise setting of irradiation time (accurate to 0.01s), minimizing timing errors associated with manual operation.
III. Luminus UV-A Product Series
IV. Product Specifications Table
| Product Series | Typical Current | Package Type and Dimension | Power Range |
|---|---|---|---|
| SST‑10‑UV‑B120 | 0.5‑1.0A | SMT, 3.45mm x 3.45mm | 875‑1000mW |
| CBT‑39‑UV‑C32 | 6A | MCPCB,26.5mm x 16.0mm | 4‑6W |
| CBM‑40‑UV‑C32 | 3A | MCPCB,26.5mm x 16.0mm | 4‑8W |
| CBT‑90‑UV‑C31 | 13.5A | MCPCB, 28.0mm x 26.75mm | 12‑15W |
| CBT‑120‑UV‑C31 / C14 "Slim" | 18A | MCPCB, 44.5mm x 10.0mm | 16‑21W |
| CBM‑120‑UV‑C31 / C14 "Slim" | 9‑18A | MCPCB, 44.5mm x 10.0mm | 10‑20W |
| SBM‑120‑UV | 2.25A | MCPCB,10mm x 11mm | 8‑14.6W |
V. Luminus UVA LED Application Scope
- Electronics Assembly (385, 395, 405nm): Spot curing, area curing; compatible devices: CBT-90, CBM-120-C31, SBM-120, SST-10.
- Industrial Curing (365, 395nm): Wood coatings (paints), lamination material curing, surface finish curing; compatible devices: CBT-120-C14, CBM-120-C14, SBM-120.
- Printing Industry (365, 385, 395nm): Flexible circuit board printing, inkjet printing, screen printing; compatible devices: CBT-120-C14, CBM-120-C14, SBM-120, SST-10.
- Other Applications (365, 385, 405nm): Maskless lithography, 3D printing, medical imaging, fluorescence imaging, photocatalytic purification; compatible devices: CBT-39, CBM-40, CBT-90, CBT-120, CBM-120.
V. Typical Applications for Luminus Products
Spot curing. Typical scenarios include medical bonding applications, such as dentistry and the assembly of various medical instruments and materials. Compatible devices include the CBT-90-UV, CBT-120-UV, and CBM-120-UV. These devices feature packages fully compatible with other Luminus LEDs, allowing the same optical and structural designs to be reused for CBT-90 RGBW color products; this saves on re-tooling costs when developing multiple product variants for medical equipment.
Linear curing. Compatible devices include the CBT-120-UV-C14 and CBM-120-UV-C14. Their elongated package design facilitates high optical power density and high UV irradiance, making them ideal for production lines involving narrow-format, continuous material processing.
Desktop UV 3D printing. Compatible devices include the CBM-40-UV and CBT-39-UV; their emitting surface dimensions are perfectly matched to Texas Instruments (TI) 0.55" XGA and 0.45" WXGA DMDs. Take the CBT-39-UV as an example: its chip aspect ratio is 1:1.1, specifically designed for alignment with 0.55" XGA DLP optical engines. It features a junction-to-case thermal resistance of 1.6°C/W and delivers a typical optical power of 6.6W when driven by 6A DC current. High compatibility eliminates the need for additional beam shaping within the optical engine, thereby reducing both the overall system size and cost.
Digital Maskless Lithography (DLP). Compatible devices include the CBT-120-UV and CBM-120-UV; these are targeted at direct-write exposure applications and also emphasize compatibility with TI DLP optical engines.
VI. Key Points for Procurement and Selection
1. Determine the formulation before the wavelength. The absorption peak of the photoinitiator dictates whether to use 365nm or 395/405nm. If uncertain, conduct small-scale comparative tests; curing depth and surface tackiness provide more practical insight than datasheet parameters alone.
2. Distinguish between radiant flux and irradiance. Datasheets specify radiant flux per unit (W), whereas production lines require irradiance at the workpiece surface (W/cm²). With the same device, variations in optical design and irradiation distance can result in an order-of-magnitude difference in the value reaching the workpiece.
3. Thermal resistance and junction temperature are critical to lifespan. The radiant efficiency of UVA LEDs drops as junction temperature rises; MCPCB packages must be paired with a heat sink of sufficient surface area. While the CBT-120-UV is officially rated with a junction-to-heat-sink thermal resistance of less than 1°C/W, this figure is valid only when the heat sink's thermal resistance is properly matched.
4. Request the latest datasheet (including binning tables and wavelength sorting), spectral distribution curves (to verify peak wavelength and FWHM), and batch consistency data.
5. Confirm the product lifecycle status for long-term projects. Medical and semiconductor equipment often have lifecycles spanning five to ten years; if a component is discontinued, the cost of redesigning the system far outweighs any initial savings on component procurement.
About Gainer
Gainer LED (www.gainer-led.com) is a supplier and distributor of LED components serving overseas markets, offering medium- to high-power devices spanning the ultraviolet to infrared spectrum. Please submit your requests-including sample applications, datasheet inquiries, bulk price quotes, and cross-reference confirmations-for the Luminus high-power UVA LED series via the online form on our website or by email.
