This is an extremely useful device and can take all the headaches of figuring out how to wire your LEDs. If you are a "new-comer" to the LED world, it may be wise to start off with something like this. It will simply remove all the headaches from your installs. Simply insert this into your circuit and your 20mA LED will light up as it should.
Another great application is to use it with automotive use because there is a fluctuating voltage in an automobile and this will ensure that your LED is operating properly at all times!
This simple device limits the current through itself to 20mA. When a voltage is applied (anywhere from 2 to 45V) it will actively adjust it's own resistance to allow just 20mA (+/- 3mA) to pass through. This makes it a perfect replacement for current-limiting resistors in LED circuits, and you won't have to calculate resistor values or worry about a varying voltage source.
The current limiter can be placed anywhere in the loop with LED's, but needs to be placed with the proper orientation, or it and your LED's could be damaged. The board has 0.032" solder holes which can accommodate wire down to 22AWG (tightly twisted) or standard 0.1" header pins (sold in our Connectors section). Note that at least ~2V across the current limiter is required for proper operation - below that and the current output will start to decrease. Multiple current limiters can also be placed in parallel to add current (40mA, 60mA, etc...).
Units are provided on a scored circuit board that can be broken apart using pliers and/or strong fingers.
- Size: 0.334 x 0.100 x 0.077"
- Hole Size: 0.032"
- Max Wire Size: 24AWG (easier fit), 22AWG (must be twisted tightly)
- Current: 20mA (+/-3mA) Voltage: 2-45V (across the current limiter itself)
- Heat Shrink Type: 3/32" clear
- Heat Shrink Length: 0.5" per unit
A soldering iron, wire stripper, and heat gun are needed for assembly.
|Current||20mA (+/- 3) Constant Current|
|Output Voltage||Varied (constant current)|
|Input Voltage||2-45V Across Limiter|
|Drive Mode||Constant Current|