Standard, 1 Form A, Solid State Relay (Photo MOSFET), 60V/0.2A/10Ω

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The ASSR-12XX Solid State Relay (SSR) series consists of an AlGaAs infrared light-emitting 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.

The single channel configurations, ASSR-1218 and ASSR-1219, are equivalent to 1 Form A Electromechanical Relays (EMR), and the dual channel configuration, ASSR-1228, is equivalent to 2 Form A EMR. They are available in 4-pin SO, 6-pin DIP, 8-pin DIP and Gull Wing Surface Mount for DIP packages.

The ASSR-1219 enables AC/DC and DC-only output connections. For DC-only connection, the output current, Io, increases to 0.4A and the on-resistance, R(ON) reduces to 2.5Ω.


  • Compact Solid-State Bi-directional Signal Switch
  • Single and Dual Channel Normally-off Single-Pole-Single-Throw (SPST) Relay
  • 60V Output Withstand Voltage
  • 0.2A or 0.4A Current Rating (see schematic for ASSR-1219 connection A and B)
  • Low Input Current: CMOS Compatibility
  • Low On-Resistance: 0.25 Ω Typical for DC only, 1 Ω Typical for AC/DC
  • High Input-to-Output Insulation Voltage
    (Safety and Regulatory Approvals Pending)
    - 3750 Vrms for 1 min per UL1577
    - CSA Component Acceptance
  • Options available are:
    50XE = Tape and Reel Packaging Option
    XXXE = RoHS Compliant Option

ASSR-1219 & ASSR-1228
30XE = Gull Wing Option
50XE = Tape and Reel Packaging Option
XXXE = RoHS Compliant Option


  • Telecommunication Switching
  • Data Communications
  • Industrial Controls
  • Medical
  • Security
  • EMR / Reed Relay Replacement

Lifecycle Status


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
RoHS6 Compliant Y
On-resistance (ohm) 10.0
Output Off-State Leakage (nA) 1000
Output Load Current (A) 0.2
Output Withstand Voltage (V) 60
Package SO4
Turn Off Time (msec) 5.0
Turn On Time (msec) 5.0
UL Insulation Rating Viso (VRMS) 3750.0
Application Brief1 i
Application Note5 i
Brochures1 i
Options Data Sheet6 i
Regulatory Certificate1 i
Selection Guide2 i
White Papers2 i
FAQs1 i
Promotional Material1 i