RELETEK RS-TB12F OFF-Delay Time Relay

The RELETEK RS-TB12F OFF-Delay Time Relay is a timing control device designed for electrical automation systems where a circuit or load needs to remain energized for a defined period after the control signal is removed. Unlike an ON-delay relay, which introduces a delay before energizing its output, an OFF-delay timer keeps the output active for the preset time after the initiating signal is switched off.

The RS-TB12F belongs to the RELETEK OFF-delay time relay series and is intended for use in control panels, automation circuits, machinery, lighting systems, and other electrical installations requiring controlled delayed switching. The relay can be used to coordinate the operation of contactors, motors, fans, pumps, solenoid valves, and other control devices where immediate deactivation is not desirable.

In a typical OFF-delay application, the relay output changes to its active state while the control input is present. When the control signal is removed, the internal timing circuit begins counting the preset delay period. The output then returns to its normal state after the selected time has elapsed. This operating principle can be useful for maintaining ventilation, allowing a motor or actuator to complete a sequence, keeping lighting active temporarily, or providing controlled shutdown behavior in automation equipment.

The RS-TB12F is part of a model family that also includes the RS-TB14F and RS-TB23F variants. RELETEK categorizes these products specifically under OFF-delay time relays, distinguishing them from its ON-delay, asymmetric cycler, star-delta, multifunction, and other timing-relay families.

For applications involving higher-power loads, the relay output should be used to control an appropriately rated contactor or intermediate relay rather than directly switching a load beyond the relay's verified contact rating. This approach is particularly appropriate for motors, pumps, compressors, heaters, and other inductive or high-current equipment.

The RS-TB12F is therefore suited to electrical control systems where a reliable delayed OFF function is required and where timing needs to be incorporated directly into the control circuit.

Features

• OFF-delay timing function

• Designed for electrical automation and control circuits

• Maintains relay output for a preset period after control signal removal

• Suitable for contactor and intermediate-relay control

• Applicable to motors, fans, pumps, lighting, and solenoid control

• Part of the RELETEK RS-TB OFF-delay relay series

• Suitable for control panels and automation installations

Specifications

Note: RELETEK's currently indexed product listing confirms the RS-TB12F as an OFF-delay time relay, but does not expose the complete model-specific specification table. The unverified values have intentionally not been guessed.

Applications

• Industrial automation control panels

• Motor control circuits

• Fan and ventilation systems

• Pump control systems

• Automatic lighting circuits

• Solenoid valve control

• Contactor control

• Machine control systems

• Delayed shutdown circuits

• General electrical automation