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large white 5mm ultra bright led

White 5mm Water Clear LED - 15deg - 5000mCd

Stock code: 3524
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100+£0.20
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500+£0.16
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SKU: 3524 Categories: , , , , , Tags: , , , , , , , , Brand:

White 5mm Ultra bright Water Clear LED with a viewing angle of 15 degrees. Luminous intensity 5000mCd.

Forward voltage drop: 3.2 V
Viewing angle: 15 degrees
Max forward current: 30 mA
Luminous intensity: 5000 mCd (@20mA)
Lens types: Water clear

Click here to download a datasheetpdf_icon.gif

Technical Information

AttributeValue
Forward voltage drop 3.2V.
Viewing angle 15 degrees.
Typical forward current 20 mA.
Max forward current 25 mA.
Luminous intensity 5000 mCd (@20mA).
Lens types Water clear.
V
mA
V
Ohms
Ohms
Enter the operating voltage, click calculate resistor, and the resistor value to work with the LED described on this page will be shown.

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Questions and answers

    How many of these will run off a 9v battery and will they need a resistor?
  1. 0 votes
    Q How many of these will run off a 9v battery and will they need a resistor?
    Asked by Rebecca on September 5, 2011 12:00 am
    Answered by the admin The forward voltage on the LED is 3.5V, this means that when the LED is lit there will be around 3.5V across it. If you put two in series then across the pair the voltage drop will be 7V. With 3 it would be 10.5V. So to answer the first part of the question you can drive two LEDs from a 9V battery. To answer the second part, as the battery is at 9V and the LEDs have 7V across then the resistor must have 2V across it. Depending on how bright you want the LEDs to be will depend on the resistor value. Lets suppose we go for 20mA flowing through the LEDs, then there will also be 20mA flowing through the resistor. So using Ohms law, if V=2V and I=0.02A then R=100 ohms.
    2. Can these be powered by a USB source? (5volt?)
  2. 0 votes
    Q Can these be powered by a USB source? (5volt?)
    Asked by Mike on April 5, 2011 12:00 am
    Answered by the admin Yes you can drive this LED from 5V however you MUST USE A CURRENT LIMIT RESISTOR. On the white USB lamp kit we use a 150 ohm resistor, which is plenty bright enough, you can go down to a 100 ohm which will give you about 20mA. If you are unsure about which resistor to use we have a nice tool in the resources section. The USB port can supply 100mA without negotiation so could run up to 5 white LEDs.
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