TDC TUC Series On-Delay Relay Output

The TDC TUC Series On-Delay Relay Output from the ATC Diversified Electronics division of Marsh Bellofram is a family of rugged, high-reliability ON-delay relay outputs, designed to equip industrial machinery, conveyor belts, exhaust fans, heating systems, lubricators, and pump and motor controls with timed sequence delay, soft-start delay or auto-start functions for added machinery and equipment protection. The time delay begins when power is applied to the input. Upon completion of the delay period, the relay energizes. Reset during or after the delay period is accomplished by removal of the input voltage. The TDC TUC Series On-Delay Relay Output 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.



  • ON-DELAY timing mode
  • Choose from multiple standard ranges
  • Optional lock nut, knob or fixed time adjustment
  • Plug-in style enclosure


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