Bipolar transistor (triode) (175) Zener diodes (36) SMD resistors (27) Optical couplers (26) SMD electrolytic capacitors (24) Rack cabinet (19) Digital triode (18) Wireless modules (17) DC-DC ICs (11) MOSFET (9) Power monitoring ICs (7) Signal relay (7) MCU monitoring ICs (6) LED drivers (6) Tapes/Labels (6) Screwdriver/tweezers/wrench tools (6) Codec ICs (4) Wire to Board Connectors/Wire Splice Connectors (4) (4) Other processors (3) Male Pin headers and female headers (3) Active Crystal Oscillators (3) Industrial relays (2) Communication satellite positioning module (2) Plug-in connectors (1) Connector accessory kits (1) General-purpose diodes (1) Speakers (1) Light-emitting diodes (1)