Pros and cons of SMD over through hole

Thread Starter

manish oberoi

Joined Jul 15, 2008
Can anyone help me out the pros and cons of using SMD based components instead of through hole which we are now trying to
switch in our SMPS based UPS.
Any books please specify

John Luciani

Joined Apr 3, 2007
From my experience ---

SMD components are less expensive.
SMD components take up less board space and storage (lower costs).
With the exception of pin-grid arrays State-of-the-Art components are produced
only in SMD.

Also for larger SMD components (passives > 0603, lead pitch >=0.5mm) I find it easier
to hand assemble than TH. No leads to cut. You are not flipping the board as often.

(* jcl *)


Joined Jun 13, 2008
SMT is far superior than through hole technology.
Main advantages are:
Fewer unwanted RF signals effect.
Less cost in general.
Better vibration performance.
Lower resistance and inductance at the connections great for higher freq.
Double sided boards.
Much higher number of components on one board.
Fewer holes per board.
Manual handleing difficult for repair or prototyping.
Cannot use breadboars.