It's also 1.62K ohms, but it looks like it's 1/8W instead of 1/4W (no idea what that means). Does that matter?W
denotes power dissipation capability, or in other words, how much heat can resistor expel before taking damage. Power dissipation can be calculated by multiplying current
going through resistor by voltage
dropped over resistor. For example, if You use 100 Ohm
resistor to short 12V
battery, by Ohm's Law current in circuit is going to be I(current) = V / R = 12 / 100 = 0.12A
. As there is only one component in our simple circuit, it means that resistor has to drop whole 12V (voltage is not spread across components), hence power dissipation from resistor will be 12V * 0.12A = 1.44W
. You can see that if our resistor is rated only for 0.25W
- it will burn due to power dissipated being too high. To answer Your question, it does matter. What You can do, is connect two 1/8W resistors in parallel to get 1/4W power dissipation capability.
Also, 1/8W resistor from Mouser is an SMD (surface mounted device) meaning that it is very small compared to regular (through the whole) resistor, hence needing smaller soldering tip, lower heat and better soldering skills.
If I really have to, I'll buy it from Digikey, but I was hoping to get all the parts from one place for ease of shipping and stuff.
Have You considered eBay?