Mark_R
Member
Happy new year!
On a surface mount projects the larger caps are usually still through hole mount. Obviously there is a size limit to what is available in SMD, but I was trying to understand the logic of not using SMD.
For instance, my project calls for a 25V 470uf alum. elec. cap. In looking at numerous surface mount PCBs made by others, I see that generally the caps in this size range or bigger are through hole, yet looking at the supplier inventory one can get an SMD cap of this size (it's still an aluminum can but mounted on a SMD adapter base Digi-Key - PCE3909CT-ND (Manufacturer - EEE-1EA471P) ) for similar price and availability, so why don't I see them in widespread use? Wouldn't minimizing the amount of through hole components be a priority or is that not a big deal in mass production?
Is there a rule of thumb at wht size on generally switches from SMD to TH?
Thanks.
On a surface mount projects the larger caps are usually still through hole mount. Obviously there is a size limit to what is available in SMD, but I was trying to understand the logic of not using SMD.
For instance, my project calls for a 25V 470uf alum. elec. cap. In looking at numerous surface mount PCBs made by others, I see that generally the caps in this size range or bigger are through hole, yet looking at the supplier inventory one can get an SMD cap of this size (it's still an aluminum can but mounted on a SMD adapter base Digi-Key - PCE3909CT-ND (Manufacturer - EEE-1EA471P) ) for similar price and availability, so why don't I see them in widespread use? Wouldn't minimizing the amount of through hole components be a priority or is that not a big deal in mass production?
Is there a rule of thumb at wht size on generally switches from SMD to TH?
Thanks.