Description
The Kele Product 821TD10H-UNI SPDT Time Delay Relay DIN 15A 12–240 VAC/DC is a multifunction timing control part used to delay, sequence, or regulate electrical switching operations within control circuits. It operates through an internal electronic timing module that activates or deactivates its relay contacts after a preset delay period, supporting multiple timing modes such as on-delay, off-delay, and interval control. In HVAC systems used in building automation and equipment sequencing applications, it is positioned inside control panels to coordinate fan, compressor, or auxiliary part operation. The unit is DIN-rail mounted and connected through universal voltage terminals for flexible integration.
