For example: Agilent E4440A or Anritsu 68369
Keysight / Agilent Electronic Loads
Keysight / Agilent 60503A
DC Electronic Load Module 3-240V/0-10A 250W
Manufacturer: Keysight / Agilent
Keysight / Agilent N3303A
250 Watt Electronic Load Module, 0-240V, 0-10A
Manufacturer: Keysight / Agilent