Why Choose the Finder 13.21.8.230.B000 YESLY Bluetooth Multifunction Relay?
The Finder 13.21.8.230.B000 is a 16 A Bluetooth multifunction electronic relay designed for the Finder YESLY smart home and building automation system. Combining wireless control, conventional wired push-button operation and programmable switching functions, this compact single-channel relay provides a practical way to upgrade traditional electrical installations with smart control capabilities.
Featuring one volt-free changeover contact (1 CO / SPDT) rated at 16 A, 250 V AC, the Finder 13.21.8.230.B000 supports a range of suitable lighting, socket control and auxiliary switching applications. Its 110–230 V AC supply, Bluetooth Low Energy connectivity and 12 selectable operating functions make it suitable for both new electrical installations and smart home retrofit projects.
The relay is designed for recessed installation in electrical wall boxes, including suitable round boxes with a nominal diameter of 60 mm. It can be configured using the Finder YOU app and integrated with compatible YESLY wireless push buttons, input interfaces and gateways. With support for up to eight scenarios, the Finder 13.21.8.230.B000 offers flexible control without requiring a complete replacement of existing switches or wiring arrangements.
Key Advantages
- Bluetooth Low Energy (BLE) connectivity for wireless smart home control.
- 16 A volt-free changeover contact provides flexible switching of compatible electrical circuits.
- 12 selectable operating functions, including impulse relay and timed switching modes.
- Supports up to eight YESLY scenarios for customised automation.
- 110–230 V AC supply for suitable mains-powered installations.
- Compatible with wired push buttons connected to either phase or neutral.
- Can convert conventional switching installations into smart systems without replacing existing wall switches.
- Works with compatible YESLY wireless push buttons and control accessories.
- Finder YOU app configuration simplifies setup and function selection.
- Supports smartphone control through the YESLY system.
- Remote access and compatible voice assistant integration are possible using an appropriate YESLY gateway.
- Compact recessed mounting helps maintain a discreet installation.
- Zero-crossing switching technology supports controlled operation of suitable AC loads.
- Suitable for smart lighting, controlled sockets, electric locks and auxiliary automation circuits.
Key Features
- Finder 13 Series YESLY multifunction relay.
- Single-channel Bluetooth electronic relay.
- One 16 A changeover output contact.
- Volt-free output suitable for independently supplied compatible circuits.
- Rated contact voltage: 250 V AC.
- Supply voltage: 110–230 V AC, 50/60 Hz.
- Bluetooth Low Energy communication with encrypted connection.
- 12 programmable operating functions.
- Eight configurable scenarios.
- One input for conventional wired push-button control.
- Push-button connection to either live or neutral, according to the installation diagram.
- Supports impulse operation using momentary push buttons.
- Includes a switch-controlled impulse function for upgrading conventional installations.
- Programmable timing functions with settings from 1 second to 24 hours.
- Compatible with Finder YESLY wireless controls.
- Recessed wall box mounting.
- Optional Finder 013.17 DIN rail adaptor for compatible 35 mm rail installations.
- Screw terminal connections.
- IP20 protection rating.
- Operating temperature: -10 to +50 °C.
Smart Switching with Finder YESLY Bluetooth Technology
The Finder YESLY system provides wireless control of lighting and other compatible electrical devices using Bluetooth technology. The Finder 13.21.8.230.B000 acts as a switching component within this ecosystem, receiving commands from compatible wired and wireless controls.
Unlike a conventional impulse relay that relies solely on electrical commands from physical switches, the Finder 13.21.8.230.B000 can also respond to wireless instructions from compatible YESLY devices. This allows users to operate connected circuits using suitable wall controls or a smartphone.
The relay communicates using Bluetooth Low Energy, a wireless protocol designed for low-power control applications. Finder specifies an approximate communication range of 10 m in free space, although actual performance depends on building materials, wall construction, equipment positioning and other environmental factors.
The device supports 128-bit encrypted Bluetooth communication and can be configured using the Finder YOU app. Installers can select the required operating function, configure timing parameters, associate compatible wireless controls and define automation scenarios.
For installations requiring control from outside normal local Bluetooth range, a compatible Finder YESLY gateway can provide additional connectivity. Gateway functionality depends on the selected device, network availability and the supported integrations.
12 Selectable Functions for Flexible Electrical Control
One of the principal advantages of the Finder 13.21.8.230.B000 is its range of 12 selectable operating functions. These functions allow the relay to perform different switching tasks without changing the physical device.
The default RI impulse relay function is intended for push-button control. Each valid momentary command changes the relay output state, making it suitable for lighting circuits operated from one or more push-button positions.
The special RIa switch-controlled impulse function is particularly useful when upgrading existing installations. It enables traditional switching arrangements, including conventional one-way and multiway circuits, to be incorporated into a smart control system while retaining suitable existing wall switches.
The available functions also include timed operating modes. Depending on the selected function, the relay can be configured to switch a connected circuit according to an adjustable timing sequence.
Using the Finder YOU application, supported timing parameters can be configured from 1 second to 24 hours. This makes the device useful for applications such as timed lighting, controlled equipment operation and auxiliary switching sequences.
The correct function should be selected according to the intended circuit behaviour. Installers should consult Finder's current function table and wiring instructions before commissioning the relay.
Upgrade Conventional Switches Without Replacing the Entire Installation
The Finder 13.21.8.230.B000 is especially useful for smart home retrofit projects. Existing electrical installations often use conventional one-way, two-way or intermediate switching arrangements to control lighting and other circuits.
Replacing all switches and rewiring the installation can be disruptive and expensive. Finder's switch-controlled impulse function provides an alternative by allowing suitable conventional switching arrangements to be integrated into the YESLY system.
Once configured, the relay can continue to respond to existing physical controls while also accepting commands from compatible YESLY wireless devices.
This provides a practical transition from traditional electrical control to smart switching, particularly in residential properties, refurbished buildings and installations where maintaining the existing appearance of wall switches is desirable.
The relay also supports wired push buttons connected to either phase or neutral, giving installers additional flexibility when adapting different existing wiring arrangements. The appropriate three-wire or four-wire connection diagram must be followed for the chosen installation.
16 A Volt-Free Changeover Contact for Versatile Switching
The Finder 13.21.8.230.B000 incorporates one volt-free changeover contact, also described as a single-pole double-throw or SPDT output.
Unlike an output that permanently supplies the relay's own operating voltage, a volt-free contact provides an independent switching path. This allows the output to be incorporated into suitable circuits with their own supply arrangements, provided all applicable voltage, insulation and current requirements are respected.
The contact is rated at 16 A and 250 V AC, with a specified AC-1 load capacity of 3600 VA at 230 V AC. Finder also specifies an AC-15 rating of 600 VA and a single-phase motor rating of 500 W at 230 V AC.
These ratings describe different load categories and should not be treated as interchangeable. Lighting drivers, electronic power supplies, motors and other inductive or capacitive loads can draw substantially higher currents during switching than during normal operation.
For LED lighting, Finder specifies a lamp-load rating of 200 W at 230 V AC in its YESLY selection documentation. The actual permissible number of connected LED drivers depends on their inrush current and electrical characteristics.
The relay also incorporates zero-crossing switching technology, which supports switching of suitable AC loads near the voltage zero crossing. Appropriate protective devices and load-rating checks remain essential.
YESLY Scenarios and Compatible Wireless Controls
The Finder 13.21.8.230.B000 can participate in up to eight configurable YESLY scenarios. A scenario allows compatible devices to respond to a predefined command, making it possible to coordinate several smart switching functions within a building.
For example, a user may configure a scenario that switches selected lights when leaving a room or activates a particular combination of connected devices. The precise behaviour depends on the other YESLY products installed and the configured system functions.
The relay can be associated with compatible Finder BEYON wireless push buttons, 013B9 wireless controls and suitable YESLY input interfaces. These accessories can provide additional control points without the need to run a conventional control cable to every switch position.
Where wireless coverage must be extended, a compatible Finder YESLY range extender can be considered as part of the system design.
For smartphone control beyond local Bluetooth coverage or integration with supported voice assistants, an appropriate Finder gateway is required. The relay itself should not be described as a standalone Wi-Fi device.
Compact Recessed Installation and Wiring Considerations
The Finder 13.21.8.230.B000 is designed primarily for recessed mounting inside suitable electrical wall boxes. Its compact construction allows the switching module to be installed behind compatible switches or within appropriate junction boxes, subject to available space and the installation requirements.
Finder identifies round wall boxes with a nominal diameter of approximately 60 mm as a typical mounting arrangement. Sufficient space must also be provided for conductors, terminal connections and safe heat dissipation.
The relay uses screw terminals and requires a 110–230 V AC, 50/60 Hz supply. The wired push-button input may be connected to phase or neutral using the appropriate manufacturer wiring diagram.
Where DIN rail installation is required, Finder offers the 013.17 adaptor, allowing compatible 13.21 devices to be mounted on a standard 35 mm DIN rail.
The device has an IP20 protection rating and an operating temperature range of -10 to +50 °C. It must be installed within a suitable electrical enclosure and protected against moisture, excessive temperatures and accidental contact with live terminals.
Installation and commissioning should be carried out by a competent electrician. The supply must be isolated before wiring, and the connected load must remain within the manufacturer's applicable electrical ratings.
Typical Applications
- Finder YESLY smart home switching systems.
- Bluetooth-controlled residential lighting circuits.
- Smart home upgrades retaining existing wall switches.
- Conversion of traditional one-way and multiway lighting installations.
- Wireless push-button lighting control.
- Smart control of suitable electrical socket circuits.
- Compatible electric lock and auxiliary control circuits.
- Timed lighting and automated switching applications.
- Building refurbishment and smart home retrofit projects.
- Small commercial building automation.
- Residential electrical control panels and junction boxes.
- Coordinated lighting scenarios using Finder YESLY devices.
- Gateway-enabled remote switching and supported voice assistant control.
- OEM smart electrical control solutions.
