SSAC Relays, TRB Series
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SSAC Relays, TRB Series
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Item Number
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Product Details


Relays, TRB Series
Item #
Time Delay Relay

TRB Series Information

  • Onboard Adjustable Time Delays
  • Fixed or Adjustable Delays from 0.05‑600s in Multiple Ranges
  • ±2% Repeat Accuracy
  • AC and DC Operating Voltages are Available
  • Isolated, 10A, SPDT or DPDT Output Contacts
The TRB Series combines an isolated, 10A electromechanical relay output with analog timing circuitry. False trigger of the TRB by a transient is unlikely because of the complete isolation of the circuit from the line prior to initiation. The initiate contact is common to one side of the line and may be utilized to operate other loads. Installation is easy due to the TRB's industry standard 8 or 11‑pin plug‑in base wiring.

Operation (Delay‑on‑Break): Input voltage must be applied before and during timing. Upon closure of the initiate switch, the output relay energizes. The time delay begins when the initiate switch is opened (trailing edge triggered). The output remains energized during timing. At the end of the time delay, the output de‑energizes. The output will energize if the initiate switch is closed when input voltage is applied. Reset: Reclosing the initiate switch during timing resets the time delay. Loss of input voltage resets the time delay and output.


Manufacturer Part NumberTRB24D1Y0.25-SSAC
Item NumberTRB24D1Y0.25
Product SeriesTRB
Family SeriesSSAC Relays, TRB Series
Mode of OperationOff Delay
Mounting TypeSocket
Time Range AdjustmentFixed
Timing Range0
Max Time0.25 s
Time Tolerance10 %
Coil Voltage24 VDC
Nominal Coil Voltage24 VDC
Contact Rating (A)10 A
Termination8 Pin
ApprovalsCE, CSA, UL
Net Weight0.375 lbs
Gross Weight0 lbs
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