Low C x R, 2 Form A, Solid State Relay (Photo MOSFET), 250V/8.5ohm/60pF

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The ASSR-322R Solid Stae Relay (SSR) is specifically designed for fast switching applications commonly found in  test and measurement systems. The low C x R and low output off-state leakage current provide higher system throughput and reduce system errors.

The ASSR-322R dual channel configuration is equivalent to 2 Form A Electromechanical Relays (EMR). One channel of the relay consists of an AlGaAs infrared lightemitting diode (LED) input stage optically coupled to a high-voltage output detector circuit.

The detector consists of a high-speed photovoltaic diode array and driver circuitry to switch on/off two discrete high voltage MOSFETs. The relay turns on (contact closes) with a minimum input current of 3mA through the input LED. The relay turns off (contact opens) with an input voltage of 0.8V or less.


  • Compact Solid-State Bi-directional Signal Switch
  • Dual Channel Normally-off Single-Pole-Single-Throw (SPST) Relay
  • 250V Output Withstand Voltage
  • 0.2A Current Rating
  • Low Input Current: CMOS Compatibility
  • Low C x R: 340pF•Ã‚¿ typical
  • Low Output Off-state Leakage Current: 30pA typical
  • Fast Speed Switching: 0.2ms (Ton), 0.02ms (Toff) typical
  • High Transient Immunity: >1kV/µs
  • High Input-to-Output Insulation Voltage
    (Safety and Regulatory Approvals Pending)
    - 3750 Vrms for 1 min per UL1577
    - CSA Component Acceptance
  • Options available are:
    300 = Gullwing Option
    500 = Tape and Reel Packaging Option
    002 = 300mils DIP8
    XXXE = Lead Free Option


  • Automatic Test Equipment
  • Data Acquisition System
  • Measuring Instrument
  • EMR / Reed Relay Replacement

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Y
On-resistance (ohm) 8.5
Output Off-State Leakage (nA) 1
Output Load Current (A) 0.2
Output Withstand Voltage (V) 250
Package 300mil DIP
Turn Off Time (msec) 0.2
Turn On Time (msec) 0.5
UL Insulation Rating Viso (VRMS) 3750.0
Brochures1 i
Design Guide1 i
Options Data Sheet5 i
Photocard1 i
Product Change Notice (PCN)4 i
Regulatory Certificate1 i
Reliability Data Sheet1 i
Selection Guide1 i
White Papers2 i