3W High Power UV LED - 395nm Ultraviolet (16mm Aluminum PCB)

Specifications:

• Power Rating: 3 Watts
• Peak Wavelength: 395nm
• Forward Voltage (Vf): 3.2V - 3.6V DC
• Forward Current (If): 600mA - 700mA (Max)
• Luminous Flux: 15-20 LM (Visibly bright purple output)
• Viewing Angle: 120° - 140°
• PCB Diameter: 16mm (Round Type)
• Life Span: > 50,000 Hours (with proper heatsinking)

Key Applications & Projects

• Flashlight Modding: Fits standard 16mm driver/LED pills for converting white LED torches to UV.
• Scorpion Hunting: 395nm is the preferred wavelength for spotting scorpions outdoors as it illuminates the terrain while making them glow.
• Portable Resin Curing: Ideal for handheld curing pens for UV glue and nail gel.
• Leak Detection: Works with standard automotive UV dyes for finding oil/coolant leaks.
• Glow Effects: Excellent for portable blacklight photography or fluorescent prop illumination.

Project Evolution 

• Prerequisites: Users often start with 5mm UV LEDs which are too weak for outdoor use.
• The Upgrade: This 3W unit provides Flood-Level Intensity. By installing this into a flashlight body with a proper reflector, you can throw a UV beam over 10-20 meters.
• Effort Level: Intermediate. Requires soldering to small pads and installing into a flashlight pill with thermal paste.

Virtual Technician: Wiring & Safety Guide

⚠️ CRITICAL WARNINGS:

• Thermal Runaway: The small 16mm board has very low thermal mass. It will overheat in <5 seconds if not mounted to a metal flashlight pill or heatsink.
• Eye Safety: Do not stare into the beam. High-intensity UV can cause eye strain.

Wiring Pinout:

• (+) Pad: Positive Input.
• (-) Pad: Negative Input.
• Driver Logic: Use a 3W LED Driver (approx 600mA). Do not connect directly to batteries.

​Packages include:

1 X 3W High Power UV LED - 395nm Ultraviolet (16mm Aluminum PCB)

Frequently Asked Questions (FAQ)

1. Will this fit my flashlight?
   If your flashlight uses a standard 16mm LED board (common in Convoy S2+, C8, and generic tactical lights), yes.
2. What is the difference between this and the 365nm version? This (395nm) emits visible violet light and is cheaper. It is better for general "glow" effects and scorpions. 365nm is invisible/dimmer but better for forensics and banknotes.
3. Why is it so purple?
   395nm is on the border of UV and visible light, so your eye perceives it as a deep, intense violet.
4. Can I run this on a single 18650 battery?
   Not directly. An 18650 is 4.2V fully charged. This LED needs ~3.4V. You must use a driver (like 71352 or 71353) to limit the current.
5. How hot does it get?
   Very hot, very fast. The small 16mm board saturates with heat instantly. You must use thermal paste and mount it to the flashlight head.
6. Can I use this for UV resin?
   Yes, 395nm works very well for most hobby UV resins and nail gels.
7. Is this 16mm board aluminum?
   Yes, it is a metal-core PCB for heat transfer.
8. Can I use it for finding scorpions?
   Yes! 395nm is excellent for scorpions.
9. Can I run it on 5V (USB)?
   Yes, but you need a resistor (e.g., 2.2 Ohm, 2 Watt) to drop the voltage.
10. Is the PCB electrically isolated?
    Yes, the bottom is neutral.
11. What is the max current?
    700mA.
12. Can I dim it?
    Yes, if your flashlight driver supports modes (High/Med/Low).
13. Does it detect pet urine?
    It works, but not as well as 365nm. The bright purple light can mask faint stains.
14. Is it waterproof?
    No, the flashlight body provides the waterproofing.
15. Can I replace the LED on the board?
    Yes, if you have reflow equipment.
16. What is the beam angle?
    ~120 degrees (Flood). Your flashlight's reflector will focus it.
17. Why use 16mm instead of 20mm?
    20mm boards are too wide for most flashlight pills. 16mm is the compact standard.
18. Will this fade fabrics?
    Prolonged exposure can fade colors.
19. Is this a Blacklight?
    Yes, 395nm is the standard "Blacklight" wavelength.
20. Can I connect wires directly?
    Yes, pads are provided, but they are small. Use a fine tip soldering iron.