SSAC Relays, HRDR Series
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SSAC Relays, HRDR Series
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Product Details


Relays, HRDR Series
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HRDR Series Information

  • 30A, SPDT, NO Output Contacts
  • 12 to 230V Operation in 5 Options
  • Encapsulated Circuitry
  • Delays from 0.1s‑1000m in 5 Ranges
  • Independent Adjustment of On and Off Delays
The HRDR Series combines an electromechanical relay and microcontroller timing circuitry. It offers 12 to 230V operation in five ranges and factory fixed, onboard or externally adjustable time delays with a repeat accuracy of ±0.5%. The high switching capacity of the output contacts allow for direct control of heavy loads like compressors, pumps, motors, heaters and lighting. A bypass/ reset switch option allows operator to interrupt normal recycling sequence and energize output relay. An excellent choice for OEM applications.

Operation (Recycling with Reset Switch): Upon application of input voltage, the ON time T1 begins and output relay energizes. At the end of the ON time, the output relay de‑energizes and the OFF time T2 begins. At the end of the OFF time, the output relay energizes and the cycle repeats as long as input voltage is applied. Some recycling timers have the OFF time as the first delay. Reset: Removing input voltage resets output and time delays, and returns sequence to the first delay. Bypass/Reset Switch: Closing the normally open bypass/ reset switch energizes the output relay and resets the time delays. Opening the switch restarts recycling operation with the first delay.

  • ±0.5% Repeat Accuracy
  • ±5% Factory Calibration
  • Factory Fixed, Onboard or External Adjust


Manufacturer Part NumberHRDR331A4R
Item NumberHRDR331A4R
Product SeriesHRDR
Family SeriesSSAC Relays, HRDR Series
Mode of OperationRepeat Cycle
Mounting TypeSurface
Time Range AdjustmentRemote
Timing Range1
Max Time100 Min, 100 s
Time Tolerance5 %
Time Range (Seconds)0-2, 0-3, 0-5, 0-10, 0-15, 0-30, 0-60, 0-100
Time Range (Minutes)0-2, 0-3, 0-5, 0-10, 0-15, 0-30, 0-60, 0-100
Time Range (Hours)0-1
Coil Voltage24 VDC
Nominal Coil Voltage24 VDC
Contact Rating (A)30 A
Termination0.250 in Flat Blade
ApprovalsCE, CSA, UL
CommentsON Time First, Bypass/Reset Option
Net Weight0.2438 lbs
Gross Weight0 lbs
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