The S430 is designed for low-power DC-DC testing and comes with a 6-slot modular DC load/source mainframe.
The S440 is designed for low-power AC-DC testing and embeds a 700W AC source in addition to the modular DC load/source mainframe within a single device.
The S450 (link) extends the S430 by adding a higher power AC/DC source or a higher power DC load ideal for testing of mid-range power supplies and parallel testing of adapters.
The S400 Series Modular Test Systems are useful for testing the following products & applications:
Power Supply Testing