Macromatic TD-78122 Time Delay Relay 11 Pin Dpdt 120VAC

Product Description

The MACROMATIC TD-78122 is an 11-pin, multiple-range time delay relay with a DPDT (double-pole, double-throw) output configuration. It supports delay intervals up to 999 hours and is rated for 120 volts AC/DC operation with a 10-amp contact rating. Timing is set via a pushbutton thumbwheel interface, giving technicians straightforward on-unit adjustment without additional programming tools. This relay is used in industrial and commercial control circuits where precise, adjustable time delays are required for sequencing, motor control, HVAC system staging, or process automation.

The TD-78122 fits into 11-pin octal-style relay sockets and is suited for panel-mount control applications in commercial HVAC systems, industrial process controls, and electrical distribution panels. Its wide delay range and multiple selectable time ranges make it adaptable across a variety of timed-circuit applications without requiring a relay change when timing requirements shift. Electricians and controls technicians are the primary installers for this type of component.

Key Features

• Delay range up to 999 hours with multiple selectable time ranges
• DPDT contact configuration for versatile switching circuit layouts
• 10-amp contact rating at 120 volts AC/DC
• 11-pin configuration compatible with standard octal relay sockets
• Pushbutton thumbwheel for direct, tool-free timing adjustment

Compatibility

Designed as an OEM-style replacement or new-installation time delay relay for 11-pin socket-mount control panel applications operating at 120 volts AC/DC.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements. De-energize and lock out the control panel before removing or inserting the relay into its socket. Verify socket pin configuration matches the 11-pin layout before seating the relay. Do not exceed the rated contact current of 10 amps on the output circuit.