Each Model 4200-SCS Semiconductor Characterizatin System can be configured with up to seven additional SMUs, for a total of nine SMUs. Two SMU models are available for use with the Model 4200-SCS, The Model 4200-SMU is a medium power (100mA, 2W) instrument, and the Model 4210-SMU is a high power (1A, 20W) instrument. The Model 4200-SCS system can support up to nine high power SMUs.