Printable catalog (PDF)
NEW PRODUCT! In-line power switch for 2.1mm barrel jack – Add a power switch to any project simply by plugging this between the power supply. This is the most useful thing you never knew you needed! You’ll want to pick up a bunch for your electronic projects.
Comes with a 5.5/2.1mm barrel jack on one end an a plug on the other. In between is an in-line switch that is rated for 125V and 2Amps (its normally used for lamps, we suppose). Since most people will be using it with no more than 12VDC, we think it can probably handle up to 5A at that voltage.
FEED
To the best of my understanding:
It’s worth remembering that the reason current limits exist on switches is for thermal protection: If the heat generated by I^2*R losses from the switch’s internal resistance is too much, the switch will melt. Because of this, contacts and switches that have a supposed current limit of 2A can in fact handle more as long as you don’t run them for too long.
This is completely independent of the voltage rating of the switch, which is more concrete. If an open switch has too high of a voltage put across it the voltage can still arc between two supposedly unconnected contacts, causing unwanted conduction and misery.
Just my $.02.
–Harry
Comment by Harry — December 3, 2012 @ 6:55 pm
Ah! Yes! Thank you!
Please also consider making one with connectors like on the "Waterproof DC Power Cable Set" (ID:743)!
Comment by Mark — December 3, 2012 @ 9:49 pm
This is nice. You guys should make the same thing but for USB micro-B so I can give my Raspberry Pi a power switch!
Comment by Sean — December 4, 2012 @ 1:34 pm