SUPCO TD73 Encapsulated Timer Relay 50/60 Hz 19-250V AC
Encapsulated timer relay provides delay-on-break function with 19 to 250V AC input and 6 second to 5 minute adjustable timing
- Delay-on-break timing protects compressor restarts
- 19-250 V AC input fits most control circuits
- Encapsulated housing resists moisture and vibration
- Potentiometer adjusts delay from 6 s to 5 min
- Solid-state SPST-NO output switches without moving contacts
SUPCO TD73 Encapsulated Timer Relay
The SUPCO TD73 is an encapsulated timer relay designed for HVAC control circuits. It provides a delay-on-break timing function across a wide input voltage range of 19 to 250V AC at 50/60 Hz. The unit mounts on a surface and uses a solid-state SPST-NO output for switching. A potentiometer allows adjustment of the delay period.
Suits HVAC delay-on-break needs.
This relay suits technicians wiring delay-on-break sequences in HVAC equipment operating between 19 and 250V AC. It is not for applications requiring delay-on-make, interval, or recycle timing functions. Buyers needing multi-function programmability or a different contact arrangement such as SPDT should look at other devices.
Adjustable 6-second to 5-minute delay range
The single specification that decides fit is the adjustable delay range of 6 seconds minimum to 5 minutes maximum set via the onboard potentiometer. Verify that your control sequence requires a delay-on-break action within this window before selecting the TD73.
How it compares
Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.
- Price $6.99
- Cheaper than about 93% of the 1,762 comparable items (median $45.99).
Specifications
| Product | |
|---|---|
| Brand name | SUPCO |
Questions about this item
How do I verify the SUPCO TD73 is timing correctly after installation?
Apply 19 to 250V AC at 50/60 Hz, set the potentiometer between 6 sec and 5 min, then confirm the solid-state SPST-NO output switches after the delay on break.
What comes with the SUPCO TD73 and what must I source separately?
The encapsulated timer relay itself is supplied; you must provide the 19–250V AC power source, mounting hardware for surface installation, and wiring for the control circuit.
Which timing range should I select on the TD73 potentiometer for my application?
Choose any setting from the 6-second minimum up to the 5-minute maximum; the single delay-on-break function covers the full span without additional versions.
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