Bipolar transistor (triode) (70) DC-DC power modules (49) Linear voltage regulator ICs LDO (33) (25) Power connectors (14) Adjustable resistor potentiometers (14) Light-emitting diodes (13) Through Hole Resistors (12) Cement resistors (10) Screw fastener hardware (10) Development board kit (10) Signal relay (8) Connector accessory kits (7) Rack cabinet (6) Power Management ICs (PMIC) (6) Other modules (6) Reed relays (6) Dedicated switches (6) Backplane connectors (5) Rotary coding switches (5) SMD resistors (4) Pushbutton Switches (4) Audio and video connectors (3) Circular connectors (3) Screwdriver/tweezers/wrench tools (3) Voltage reference ICs (3) Switching power supply ICs (2) Travel switches (2) Instrument and equipment and accessories (2) Buzzers (1) High frequency RF relays (1) LAN telecommunication cable test (1)