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The MACROMATIC TR-50222-05 is a double-pole double-throw (DPDT) time delay relay designed for precise timing control in electrical and automation systems. Built on an 8-pin base, this relay handles contact loads up to 10 amps and operates on 120 VAC/VDC coil voltage. The multiple-range timing function is adjusted via a front-mounted knob, allowing field technicians to dial in the required delay without additional tooling. Licensed electricians and controls technicians install this type of relay in panel boards, motor control centers, and automated sequencing circuits where repeatable time delay switching is required.
This relay is suited for both commercial and light industrial applications where a compact, socket-mount timing relay is needed. Typical use cases include HVAC fan delay sequencing, pump control panels, lighting control circuits, and process automation boards. The 8-pin octal footprint is a widely used industry-standard format, making it straightforward to integrate into existing relay socket installations or new panel builds.
Designed as an OEM-style replacement or new-install time delay relay for 8-pin octal relay socket applications operating at 120 VAC/VDC in electrical control panels and automation systems.
Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lockout/tagout the control panel before removing or inserting the relay into its socket. Verify coil voltage and contact load ratings match the circuit requirements before energizing. Set the timing range and delay value using the knob prior to restoring power.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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