This disinfection-grade 1W UVC LED chip is mounted on a star-shaped 20mm aluminum metal-core printed circuit board (MCPCB). Emitting in the ultra-violet C-band at a peak wavelength of 275nm, this solid-state emitter is fine-tuned for high-efficiency germicidal irradiation. By emitting directly into the peak absorption spectrum of nucleic acids, this compact module offers rapid pathogen inactivation, making it ideal for integration into smart home appliances, water purifiers, and portable medical sanitizers.

Specifications

• Form Factor / Package: 3535 SMD (3.5mm x 3.5mm high-reliability ceramic footprint)
• Mounting Substrate: 20mm Star Aluminum MCPCB (Thermal transfer base)
• Peak Wavelength: 275nm (UVC Germicidal band)
• Total Power Dissipation: 1W
• Radiant Flux (Optical Output): Typically 15mW – 35mW (Note: Optical efficiency in deep UVC is lower than visible light; physical heat makes up the remaining energy)
• Forward Voltage (VF): Typically 5.0V – 7.0V DC
• Maximum Forward Current (IF): Approx 100mA – 150mA
• Lens Window: High-purity quartz glass dome (Standard optical plastics degrade and turn yellow under UVC exposure)
• Viewing Angle: 120℃ uniform beam distribution

Features

• Peak Germicidal Effectiveness: While legacy mercury gas lamps emit at 254nm, modern biological research shows that 265nm - 275nm is actually closer to the absolute peak absorption curve of DNA and RNA. This makes a 275nm chip highly efficient at destroying pathogens per milliwatt of optical power.
• Instantaneous On/Off Switching: Unlike fluorescent UV tubes that require a warm-up period to reach full germicidal output, this semiconductor chip reaches 100% radiant output instantly upon receiving current.
• Robust Ceramic 3535 Substrate: Built using an advanced aluminum nitride (AlN) ceramic sub-mount, ensuring high structural reliability and preventing the package from cracking under intense internal thermal stress.
• Mercury-Free and Eco-Friendly: Employs completely solid-state GaN/AlGaN layers. This eliminates the risk of toxic mercury spills or chemical disposal issues common with traditional UV bulbs.

Microorganism Inactivation Mechanism

• Absorption Point: When the 275nm beam strikes a bacterium, virus, or fungal spore, the light passes through the outer cell walls and is absorbed directly by the genetic sequence (DNA and RNA).
• Structural Mutation: The radiation breaks the hydrogen bonds between base pairs, causing adjacent thymine molecules to fuse together into thymine dimers.
• Cellular Death: This structural mutation prevents the organism from reading or replicating its genetic code. Because it cannot reproduce, the pathogen is rendered completely harmless and is biologically deactivated.

Common Applications

• Dynamic Water Purification: Mounting inside consumer water pitchers, under-sink filtration paths, and water bottle caps to neutralize waterborne pathogens.
• Enclosed Appliance Sanitization: Outfitting the interiors of ice makers, dishwashers, smart trash cans, and baby bottle sterilizers.
• Surface Disinfection Sweeps: Building compact wand sanitizers for high-touch surfaces like keyboards, elevator buttons, and biometric scanners.
• HVAC Air Purification: Placing inside localized mini-split air conditioners or air purifiers to prevent mold growth on internal coil fins.

Critical Drivers & Safety Guidelines

• Constant Current Driver Required: CRITICAL: Do not connect this LED directly to a 5V or 6V fixed-voltage power supply or a battery. Deep UVC LEDs possess a steep voltage-current curve and are highly sensitive to temperature. As the chip heats up, its internal resistance drops, triggering thermal runaway which will instantly burn out the chip. You must power this module using a dedicated Constant Current LED Driver calibrated exactly to the chip's specified current (typically 100mA - 150mA).
• Heatsink Installation Mandatory: UVC LEDs convert less than 5% of electrical energy into light—the remaining 95% is converted into concentrated heat. The 20mm aluminum star board is only a thermal spreader, not a radiator. You must bolt or bond the star board down to a larger aluminum finned heatsink or device metal chassis using high-quality thermal paste. Running this chip for more than 3 seconds without a heatsink will cause the internal semiconductor layers to overheat and fail.
• Invisible Severe Biological Hazard: WARNING: High-energy 275nm radiation is completely invisible to human eyes but highly destructive to living tissue. * Skin Danger: Direct exposure can cause severe, painful radiation burns (similar to an intense sunburn) on human skin within a few seconds.
  • Eye Danger: Looking at an unshielded active UVC light can cause painful corneal inflammation (photokeratitis) and permanent retinal damage.
  • Safe Operation: Always operate this LED inside a fully enclosed, light-tight sterilization box equipped with magnetic safety cut-off switches. Never look directly at the active chip. If testing open setups, operators must wear specialized UV400-rated or polycarbonate safety shields that block short-wave UVC rays completely. Keep entirely out of reach of children and pets.