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MOSFET
Output SSRs

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MOS Output Solid State Relays (SSRs) are the most reliable, technically advanced logic-to-power interface devices available. Their basic function is to take a low current signal from a microprocessor to control the switching of both AC and DC loads, while providing an isolation barrier between logic and power.

Advantages

While this function is common to all relays, SSRs provide distinct advantages over their mechanical counterparts including:

  • Long life, fast and reliable switching
  • Bounce-free switching
  • Optical Input to Output isolation up to 5000Vrms (and beyond)
  • Low Drive Current Options (<1mA)
  • Current Limiting Option (Part number ending with -L)
  • Current Interrupt Option (SSR acts like a re-settable fuse)
  • Small package size (as small as 5x6mm - DFN Package)
  • Immunity to EMI or RFI
  • Wide range of load voltage (30V - 1500V), and load current (100mA - 10A)
  • Broad range of packages (from ultraminiature 5x6mm - DFN, high power 4 PIN SuperSIP)
  • AC or DC load switching

    • No wear and tear.
    Consistent reliable switching.

    MOSFET Output SSRs operate by taking a low level input current (<5mA) that energizes an input Infrared LED, which is optically-coupled to an IC. This IC in turn generates a photo voltage that powers MOSFETs (typically two MOSFETs connected in a source-to-source configuration, allowing for both AC and DC output loads). Since SSRs basically move photons to accomplish their switching function, they incure no mechanical wear and tear, providing consistent, reliable switching.

    Applications

    These advantages make MOS Output SSRs the ideal choice for:

  • Home/Safety security systems
  • Battery monitoring
  • I/O Boards (and Subsystems)
  • Energy Management Devices and Systems
  • Home Automation
  • Programmable Controllers
  • Multiplexers
  • Telecom/Datacom switching
  • Data acquisition
  • Medical equipment
  • Robotics
  • Aerospace
  • Reed Relay / EMR Replacement
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