Troubleshooting information on transorbs used in GE Triton dishwashers
And then on to this enrichment material from Master Reg:
seems to be a 1.5KE220CA Bi-directional TVS Diode
here's some info.
also: Service Bulletin GE TRITON XL DISHWASHERS
*Shorted Transorb will likely damage the main electronic control board.
click on picture
1500w peak 220v C = bi-directional
Source: GE Dishwasher Mod# GSD3900L00BB