If you re talking about capacitors like these then snap in refers to the way the capacitor leads are formed.
Snap in capacitor soldering.
The same thing is accomplished by bending the legs sideways on regular leaded caps.
Then heat the other leg and wiggle the capacitor some more.
Snap in caps feet are bent like a claw so they can be pushed down and snapped into the holes on the pcb.
Snap in capacitor soldering details about electrolytic capacitor uses factory video check it shenzhen shen maoxin electronics co ltd.
Snap in capacitors are used in a wide variety of applications because of the many advantages they provide.
This allows them to stay on the board so you can flip it over to solder.
The safety vent on the base provides overload protection.
Alternate back and forth melting the solder while pulling on the capacitor.
The marking of the polarity makes installation easy.
To use them make sure your pcb footprint is correct including both the lead spacing and the finished hole diameter after plating.
They act as little springs to grip the pcb drill holes.
Contact with the body can cause the sleeving to crack or melt.
The aluminum case is fully insulated.
Desoldering snap in capacitors heat one leg of the capacitor until the solder melts all the while pulling on the capacitor.
When soldering aluminum electrolytic capacitors with a soldering iron the exposure should be limited to 260 c for 10 seconds or 350 c for 3 seconds.
At no time should the soldering iron come in contact with the capacitor body.