diff --git a/pdks/sky130_commercial_pdk/src/lib.rs b/pdks/sky130_commercial_pdk/src/lib.rs
index 44725ae..fa33d3e 100644
--- a/pdks/sky130_commercial_pdk/src/lib.rs
+++ b/pdks/sky130_commercial_pdk/src/lib.rs
@@ -201,5 +201,9 @@ M0 d g s b phighvt l='l' w='w' mult='mult'
 .SUBCKT sky130_fd_pr__nfet_01v8_lvt d g s b PARAMS: w=1.0 l=1.0 mult=1
 M0 d g s b nlowvt l='l' w='w' mult='mult'
 .ENDS
+
+.SUBCKT sky130_fd_pr__diode_pw2nd vnb diode PARAMS: p=1.0 a=1.0
+D0 vnb diode ndiode area='a' pj=2.64
+.ENDS
 "
 );