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