Rigol Circuit Breakers Electrical load 623658 - Rigol DL3021, The Rigol DL3021 is an electrical load designed by Rigol, capable of 150 V DC, 40 A, and 200 W. It features precision and reliability for testing power supply units and battery discharge experiments. This versatile product is ideal for electronic engineers and technicians in laboratory settings. Rigol DL3021 Electronic Load 150V DC 40A 200W 4 Modes USB RS232 Battery Test