• Set of three clear 3mm UV LED diodes with long leads on white background.
  • Side profile of unlit 3mm LED showing internal cathode and anode structure.
  • Close up of 3mm UV LED lit up showing bright violet 395nm output in hand.
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3mm 395nm UV LED Diodes – Ultraviolet Light Emitting Diodes

3mm 395nm UV LED Diodes – Ultraviolet Light Emitting Diodes

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HK$12.00
HK$12.00
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產品簡介

Unlock the power of ultraviolet light for your DIY electronics and repair projects. These 3mm 395nm UV LEDs emit a high-intensity violet-ultraviolet beam, perfect for UV resin curing, counterfeit currency detection, and fluorescent inspection. Featuring a water-clear lens for maximum output and standard through-hole mounting, this 3-pack is an essential addition to any hobbyist's toolkit.

主要功能

  • True 395nm Wavelength: Emits genuine UV-A light suitable for curing and detection tasks.
  • Water-Clear Lens: Maximizes light intensity and beam precision without diffusion.
  • Standard T-1 Form Factor: 3mm diameter fits standard PCB holes and breadboards effortlessly.
  • High Efficiency: Bright output with standard low-current consumption (approx. 20mA).
  • Versatile Application: Perfect for DIY PCB repairs, resin curing torches, and leak detection.
  • Value Pack: Includes 3 pieces per order, ensuring you have spares for your project.

完整產品描述

Precision Ultraviolet Lighting for Makers and Technicians

Whether you are building a custom "black light" effect, repairing electronics, or experimenting with STEM projects, the quality of your components matters. Our 3mm 395nm UV LEDs are engineered to provide reliable, consistent ultraviolet output in a compact form factor.

 

Why Choose 395nm?

Unlike standard blue LEDs, these diodes emit light at the 395nm wavelength. This puts them right on the border of visible violet light and ultraviolet A (UVA). This specific wavelength is the "sweet spot" for many practical applications:

  • UV Curing: Ideal for hardening UV-sensitive resins and glues used in jewelry making and electronics repair.
  • Fluorescence: Makes UV-reactive paints, scorpions, and security strips on banknotes glow brightly.
  • Sterilization Experiments: Useful for school science projects demonstrating the properties of light.

 

Easy to Integrate

Designed with standard 3mm water-clear casing (T-1 package), these LEDs fit easily into breadboards, PCBs, and custom housings. Their low power consumption and long operational life make them a superior choice for battery-operated devices.

技術規格

  • Component Type: UV LED (Light Emitting Diode)
  • Package Size: 3mm (T-1) Round Head
  • Lens Color: Water Clear
  • Emitted Color: UV Purple / Violet
  • Wavelength: 395nm – 400nm
  • Forward Voltage (Vf): 3.0V – 3.4V (Typical)
  • Forward Current (If): 20mA
  • Viewing Angle: Approx. 20° – 30°
  • Quantity: 3 Pieces

送貨方式

  • 提供香港本地送貨及門市自取服務。
  • 訂單滿HK$400 可享 免運費；未滿 HK$400將收取 HK$35 運費。
  • 所有訂單由 順豐速運（SF Express） 派送，於星期一至六 下午 6:00 前確認的訂單，一般可即日寄出。
  • 香港地區預計送貨時間為 發貨後 1–3 個工作天。
  • 門市自取之詳細安排（取貨地點及時間）將透過 電郵或電話訊息 另行通知。

 

常見問題

Q: Do I need a resistor to use these UV LEDs?
A: Yes, like all LEDs, you must use a current-limiting resistor to prevent burning them out. If you are using a 5V power source (like an Arduino), a 100Ω to 220Ω resistor is typically recommended.

Q: Will this cure UV resin?
A: Yes, 395nm is a standard wavelength for curing most consumer-grade UV resins and adhesives. However, curing time depends on the thickness of the resin and the number of LEDs used.

Q: Is the light invisible?
A: No, 395nm is "near-UV." You will see a visible deep purple/violet glow, but it also emits significant UV-A energy that causes fluorescence in reactive materials.

適用對象/場景

  • Electronics Hobbyists: For Arduino/Raspberry Pi indicators and sensors.
  • Repair Technicians: For UV glue curing on phone screens or PCBs.
  • STEM Educators: Teaching light spectrums and energy.
  • Collectors: Checking anti-counterfeit features on banknotes or stamps.

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