Ebbw Vale are the only non-Principality Premiership left in the draw with Neath taking on Aberavon in the other semi-final.
The quarter-final clash between the championship side and Ponty was postponed last weekend because of the adverse weather conditions. They will attempt to get a result this weekend, weather permitting.
Swalec Cup: semi-finals
Carmarthen Quins v Ebbw Vale or Pontypridd
Neath v Aberavon
SWALEC Plate: Semi-finals
Rhydyfelin v Ystrad Rhondda
Cwmllynfell v Heol y Cyw
SWALEC Bowl: Semi-finals
Wattstown v Blaenavon or Penlan
Cilfynydd or Cambrian Welfare v Fishguard & Goodwick
All of the above games to be played weekend of 13 April 2013.