TSC Series ON-Delay Solid-State Output Time Delay Relay

The TSC Series ON-Delay Solid-State Output Time Delay Relay from the ATC Diversified Electronics division of Marsh Bellofram is a family of rugged, high-reliability ON-delay solid state output time delay relays (TDRs), available in both fixed and adjustable time versions.  The time delay begins when power is applied to the timer. Upon completion of the delay period, the load energizes. Reset during or after the delay period is accomplished by removal of the input voltage. The TSC will not false transfer if voltage is removed prior to completion of the delay period. A fast recycle time permits accurate, high speed, continuous operation.



  • Load energizes upon completion of delay time
  • Fully encapsulated
  • Fixed and adjustable time versions


  • Industrial machinery and equipment
  • Conveyor belts
  • Exhaust fans
  • Heating systems
  • Lubricators
  • Pump and motor controls
  • Flashing light control
  • Engine auto start control