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TDR-S: Start-Up Delay Time-Delay Relay

Status: Units are built to order - Please expect up to 2-week delay after receipt of order until order is shipped


This version of the TDR starts its turn-on timer immediately on power-on. After the timer is finished, the trigger inputs will switch the connected device immediately on and off, with no delay.

This relay is useful for many motorcycle owners who want separate relays for low and high beams. In this application, the motorcycle could be in either low or high-beam mode when starting, so both relays need to stay off during the turn-on delay period. After this, the user needs to be able to change between low and high beams with no delay. The TDR-S will do all this, by connecting the low and high-beam signal wires to the trigger inputs, and setting the appropriate turn-on delay.

The specifications for this relay are the same as the normal TDR, except that it immediately starts the turn-on countdown as soon as it turns on, and afterwards there is no delay on the trigger inputs. Also, it only has a 0-120 second adjustable delay. In addition, this relay comes in both negative-switching (TDR-S) and positive-switching (TDR-PS) versions. If you're interested, just click on one of the buttons below!

Wiring these relays is the same as for the standard TDR and TDR-P relays.

Here are two typical wiring diagrams showing the use of these relays on a motorcycle or car for delaying the turn-on of headlights.

Dual HID with Dual TDR-PS Diagram
TDR-PS Time-Delay Relay Connections


Dual HID with Dual TDR-S Diagram
TDR-S Time-Delay Relay Connections



Item Added!
Positive-Switching Start-Up Time-Delay Relay (TDR-PS)
Price: $32
Item Added!
Negative-Switching Start-Up Time-Delay Relay (TDR-S)
Price: $32