Transistor General Purpose BJT NPN 40 Volt 1 Amp 3-Pin TO-92 Bulk: Amazon.com: Industrial & Scientific
Kungber DC Power Supply Variable with Memory, 30V 5A Adjustable Switching Regulated DC Bench Linear Power Supply with Memory Recall and Output Disable Button 4 Digits Display and Alligator Leads: Amazon.com: Industrial
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Kemo M103N Master/Slave Switch 230V/AC (400V/AC) Turns off other load when the machine is turned on, lamp etc. Monitoring 1-phase or 3-phase machines, Black : Amazon.de: Electronics & Photo
Amazon.com : Blue Sea Systems 12V DC ML Solenoid : Boating Battery Switches : Sports & Outdoors