Panasonic FM/FR Low ESR Electrolytic Capacitors w/Cap Cap option

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  • Regular price $1.05


The FM/FR series is an industry standard capacitor in FPV multirotors.  They are some of the lowest ESR options on the market for the given size and do a good job managing electrical noise when used correctly.  (FR series preferred for higher powered systems)

If you have random jitters, ticks or a shaky/fluttering quad on throttle or sharp movements, you may have electrical noise in the system and you can try applying a capacitor to see if it will help.  Using a capacitor by default is good practice and will improve the overall reliability of most crafts.

To use any capacitor correctly, solder no smaller than 18awg wires as close to the base of the capacitor as possible and connect them to the batt in pads on the ESC/AIO board with no more than 1.3” or ~35mm length of the 18awg wire. Thicker wire doesn’t help much to give you a longer distance from the battery in pads. Ideally less than 30mm is preferred.  We strongly recommend the use of a Cap Cap to improve ease of use.

The correct size depends on your drivetrain and voltage. Generally, 25v is used for 2S-4S and 35v is used for 6S. No quad in the 2”-6” range should need more than 1000uf of capacitance. If it does need more, your ESC is not a good match for the motor/prop combo. The lower power the quad is, the less capacitance you can get away with.

35v 1000uf FM Series w/cap cap and wire
Cap Cap V3 with 38mm 18awg wire pre-soldered
This is the maximum length of wire that is recommended
5.1g with all wire

25mm long (Cap Cap included), 12.5mm diameter

25v 1000uf FM Series w/cap cap and wire
Cap Cap V3 with 38mm 18awg wire pre-soldered
This is the maximum length of wire that is recommended
3.9g with all wire
25mm long (Cap Cap included), 12.5mm diameter

25v 1000uf - FR Series
3.6g
21mm long, 13mm diameter

25v 330uf - FR Series
1.3g
13mm long, 10mm diameter

35v 330uf - FR Series
1.7g
22mm long, 8mm diameter

25v 1000uf - FR Series
3.6g
21mm long, 13mm diameter

35v 1000uf - FM Series
3.7g
21mm long, 12.5mm diameter

 


Customer Reviews

Based on 9 reviews
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N
Norman Childs (Louisville, US)
Did not use

Too big for my 4 inch build

A
Andrew Kranak (Mesa, US)
Works great!

After combining these caps with a spike absorber, even a FET tech ESC is hard to blow up.

M
Matt (Bullhead City, US)
Clean

Clean way to organize a cap on a FC. Solder joints are well done. Wire is high quality. I'm a little concerned about the exposed solder joints shorting on my frame or something so I will be putting a dab of silicone over them. Might be a good feature to add as standard at the factory.

T
Tim Baitinger (Little Rock, US)
Pre wired cap

These work well and are already pre wired with correct length of wire!

K
Kyle Thompson (Portland, US)
Great

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