# Off delay relay module, QF-RD21F, settable 0.5s-300minute , 100-220VAC, with trigger

> Off delay relay module QF-RD21F, with adjustable delay time between 0.5s and 300minute, power supply 100-220VAC. Requires a trigger signal to operate and connects between power supply and load. Output contact type Closed-Open, with LED indicator for status and timing. Dimensions 88 x 36mm. Suitable for fans (compatible 110-250VAC, 2-wire) for delayed shutoff after use.

- Page: https://sigmanortec.ro/en/off-delay-relay-module-qf-rd21f-settable-05s-300minute-100-220vac-with-trigger
- Price: 44.95 RON
- Availability: In stock; 1-2 zile
- Reference: 9671 · EAN: 5947551558329
- Category: Electronic components > Timer Modules
- Specifications: Output Type Voltage: Closed-Open Contact; Input Voltage: 100 - 220 VAC; Input Voltage Type: AC
- Package (shipping data): 0.037 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 04:50 (Europe/Bucharest)

## Description

Allows delayed shutdown of a consumer after a trigger signal, ideal for bathroom or kitchen fans for additional exhaust after use. It has adjustable delay between 0.5s and 300 minutes, operates at 100-220VAC, includes LED indicator for status and timing, simply mounts between the supply and the load for precise and efficient control.
The relay module with adjustable timer AC100V-220V for the delayed shutdown command is an advanced and efficient solution for controlling and timing the shutdown of electronic devices. This smart device allows users to adjust the time interval for the delayed shutdown of the consumers.
This module was designed especially for use with a fan (which can still be replaced with another consumer).
The module requires Trigger to work. See the connection diagram below.
Used for example with a fan, this module realizes the delayed shutdown thus allowing the efficient extraction of air after the end of the activity, thus reducing humidity and creating a healthier environment in spaces such as bathrooms or kitchens.
The relay module offers precise and adjustable control over the delayed shutdown time, allowing users to adapt the timing to specific needs.
Intelligent timing allows consumers to operate only for the necessary periods, reducing energy consumption and associated costs.
Used with a fan, its delayed shutdown ensures the complete extraction of moist air after use, thus preventing the formation of mold and damage to surfaces.
The module is easily connected between the power source and the consumer. Activating the consumer will trigger the trigger. Keep in mind that working with this module requires working with AC mains voltage, the risk of electrocution being high. It should only be installed by qualified personnel.
Specifications:
Supply Voltage: AC100V-220V
Adjustable Timing: Yes
Adjustable Time Interval: Yes
Fan compatibility: 110-250VAC, with 2 wires
LED indicator: Yes (indicates the operating status and timing)
Dimensionsmm: 88 x 36mm
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