Bipolar transistor (triode) (142) Zener diodes (31) SMD resistors (25) SMD electrolytic capacitors (23) Optical couplers (23) Rack cabinet (20) Wireless modules (17) DC-DC ICs (16) Digital triode (16) MOSFET (11) Power monitoring ICs (8) LED drivers (7) MCU monitoring ICs (5) Other processors (4) LED digital tubes (4) Wire to Board Connectors/Wire Splice Connectors (3) (3) Screwdriver/tweezers/wrench tools (3) Communication satellite positioning module (3) Male Pin headers and female headers (2) Tapes/Labels (2) Codec ICs (1) Plug-in connectors (1) Accessories (1) Linear voltage regulator ICs LDO (1) Speakers (1) Signal relay (1) Industrial relays (1) Light-emitting diodes (1)