Electromechanical components can carry out electrical operations by using moving parts or by using electrical connections.

 

Piezoelectric devices, crystals, resonators

 

Passive components that use piezoelectric effect: 

• Components that use the effect to generate or filter high frequencies
• • Crystal – a ceramic crystal used to generate precise frequencies
  • Ceramic resonator – Is a ceramic crystal used to generate semi-precise frequencies
  • Ceramic filter – Is a ceramic crystal used to filter a band of frequencies such as in radio receivers
  • surface acoustic wave (SAW) filters
• Components that use the effect as mechanical transducers.
• • Ultrasonic motor – Electric motor that uses the piezoelectric effects
  • For piezo buzzers and microphones, see the Transducer class below 

Terminals and connectors

 

Devices to make electrical connection 

• Terminal
• Connector
• • Socket
  • Screw terminal, Terminal Blocks
  • Pin header 

Cable assemblies

 

Cables with connectors or terminals at their ends 

• Power cord
• Patch cord
• Test lead 

Switches

 

Components that can pass current ("closed") or break the flow of current ("open"): 

• Switch – Manually operated switch.
• • Electrical description: SPST, SPDT, DPST, DPDT, NPNT (general)
  • Technology: slide switches, toggle switches, rocker switches, rotary switches, pushbutton switches
• Keypad – Array of pushbutton switches
• DIP switch – Small array of switches for internal configuration settings
• Footswitch – Foot-operated switch
• Knife switch – Switch with unenclosed conductors
• Micro switch – Mechanically activated switch with snap action
• Limit switch – Mechanically activated switch to sense limit of motion
• Mercury switch – Switch sensing tilt
• Centrifugal switch – Switch sensing centrifugal force due to rate of rotation
• Relay – Electrically operated switch
• Reed switch – Magnetically activated switch
• Thermostat – Thermally activated switch
• Humidistat – Humidity activated switch  
• Circuit Breaker – Switch opened in response to excessive current: a resettable fuse 

Protection devices

 

Passive components that protect circuits from excessive currents or voltages: 

• Fuse – over-current protection, one time use
• Circuit Breaker – resettable fuse in the form of a mechanical switch
• Resettable fuse or PolySwitch – circuit breaker action using solid state device
• Ground-fault protection or residual-current device – circuit breaker sensitive to mains currents passing to ground
• Metal oxide varistor (MOV), surge absorber, TVS – Over-voltage protection.
• Inrush current limiter – protection against initial Inrush current
• Gas discharge tube – protection against high voltage surges
• Spark gap – electrodes with a gap to arc over at a high voltage
• Lightning arrester – spark gap used to protect against lightning strikes

Mechanical assemblies

Mini printer mechanisms:

• Thermal printer mechanisms
• Dot-matrix/ Alphanumeric printer mechanisms
• Drum/ Character printer mechanisms

 Mechanical accessories 

• Enclosure (electrical)
• Heat sink
• [[Fan (mechanical)|Fan 

Other 

• Printed circuit boards
• Lamp
• Waveguide
• Memristor 

Obsolete: 

• Carbon amplifier
• Carbon arc (negative resistance device)
• Dynamo (historic rf generator)