RD21F-C Relay Module Adjustable Time Relay Switch For Heat Dissipation Of Heating System AC100-250V

RD21F-C is a compact trigger delay-disconnect module, which is commonly used in delay-off and industrial control circuits.

When the switch is closed, the module will always output voltage. When the switch is off, the module will still work for a period of time.

The main control chip adopts industrial-grade single-chip microcomputer, accurate time, strong anti-interference, and wide application range of humidity

The power supply adopts RC step-down and direct AC access, eliminating the step-down circuit and solving the problem of wiring trouble

Large delay range, 0.2 seconds-5 hours adjustable