WMR-251A Universal Wireless Dimmer Receiver Module

Automated Home Solutions.

WMR-251A Universal Wireless Dimmer Receiver Module

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ABOUT BRAND

Product Description

The WMR-251A Universal Wireless Dimmer Receiver Module provides reliable wireless lighting control while maintaining the appearance of existing electrical installations. Installed behind a standard wall switch, it enables both manual switching and wireless dimming using compatible RF433 transmitters.

Operating on 433.92MHz RF wireless communication, the receiver supports self-learning programming for quick pairing with compatible remote controls and wall transmitters. Its universal dimming circuit automatically detects compatible lighting loads and delivers smooth, flicker-reduced dimming across multiple lighting technologies.

The receiver also features adjustable minimum brightness settings, allowing installers to optimise LED performance while reducing instability at low brightness levels. Its compact housing fits inside standard electrical back boxes, making it ideal for renovations, new smart home installations and commercial lighting upgrades.

Key Features

• Model Number:  WMR-251A
• Universal wireless dimmer receiver
• RF433.92MHz wireless communication
• Concealed in-wall installation
• Wireless ON/OFF switching
• Smooth dimming control
• Automatic load detection
• Adjustable minimum brightness level
• Compatible with dimmable LED lamps
• Compatible with incandescent and halogen lighting
• Compatible with existing wall switches
• Self-learning RF433 programming
• Compact concealed design
• Indoor use (IP20)

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Technical Details

The WMR-251A is a compact RF433 universal wireless dimmer receiver designed for concealed installation behind existing wall switches for intelligent lighting control.

Device identification

• Device Name:  Universal Wireless Dimmer Receiver Module
• Model:  WMR-251A
• Wireless Communication:  RF433.92MHz
• Power Supply:  220–240V AC, 50Hz
• Control Functions:  Wireless ON/OFF Switching and Dimming
• Application:  Concealed wireless lighting control

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Technical Specifications

Product Performance Characteristics

Reliable RF433 Wireless Communication

Operates using 433.92MHz RF wireless technology, providing dependable communication with compatible self-learning RF433 transmitters for reliable wireless switching and dimming throughout residential and commercial installations.

Universal Dimming Performance

The WMR-251A features a universal dimming circuit capable of supporting a wide variety of compatible lighting technologies. It works with incandescent lamps, 230V halogen lamps, low-voltage halogen lighting using electronic or inductive transformers, and compatible dimmable LED and CFL lamps. With support for lighting loads up to 250W (depending on load type) and dimmable LED/CFL loads from 3W to 100W, the receiver offers excellent flexibility for both new and retrofit lighting installations.

Compact Concealed Installation

Designed for discreet installation, the WMR-251A fits neatly behind existing wall switches inside standard electrical back boxes. This concealed mounting method preserves the original appearance of the room while adding advanced wireless lighting control. The receiver also allows normal manual operation of the connected wall switch alongside wireless remote control for maximum convenience.

Adjustable Minimum Brightness

To ensure optimum performance with modern LED lighting, the WMR-251A includes an adjustable minimum brightness setting. This allows installers to fine-tune the lowest dimming level according to the connected lamp, reducing flickering, preventing instability at low brightness levels and delivering smoother, more consistent dimming performance across different lighting technologies.

Electrical & Physical Specifications

The WMR-251A operates from a 220–240V AC, 50Hz power supply and communicates using the 433.92MHz RF frequency. It supports 20–250W incandescent and halogen loads, 20–250W electronic transformer loads, 40–250W inductive transformer loads, and 3–100W dimmable LED or CFL lighting. The receiver consumes less than 1W in standby mode, is designed for IP20 indoor installations, and is intended for concealed mounting behind standard wall switches in residential and commercial environments. Its compact construction allows easy installation while maintaining reliable long-term performance.

Professional Applications

The WMR-251A is designed for electricians, OEM manufacturers and smart home professionals requiring dependable RF433 wireless dimming for residential, hospitality, office and commercial lighting installations. Its universal load compatibility, automatic dimming optimisation and concealed installation make it an excellent choice for both retrofit projects and new smart building systems.

Why Clients Select ARC Technology Co Ltd

ARC Technology Co Ltd provides industrial solutions through precision engineering and adherence to international standards. Our operations are governed by rigorous quality management systems to ensure every project meets specific technical requirements and safety protocols. We focus on delivering durable results that support long term operational efficiency for our partners.

Reliability

ARC Technology Co Ltd is an established partner providing stable and consistent industrial engineering solutions.

Quality

We integrate high service standards with a comprehensive understanding of international technical and safety regulations.

Performance

Our structured methodology protects client interests and ensures all technical objectives are achieved efficiently.

FREQUENTLY ASKED QUESTIONS

1. What core industries does ARC Technology Co Ltd serve?

We provide high-precision engineering and automation hardware for both industrial sectors and residential smart home environments. Our expertise ranges from RF signal integrity and power monitoring to robust mechanical hardware for professional building applications.

2. Are your smart home products compatible with major ecosystems?

Yes. Our latest solutions are engineered for Universal Connectivity, focusing on interoperability through the Matter standard. We also fully support established protocols including Zigbee, BLE (Bluetooth Low Energy), and Wi-Fi to ensure seamless integration with your existing devices.

3. What quality certifications do your products hold?

Quality and safety are our highest priorities. Our manufacturing facility in Shenzhen is ISO certified, and our products carry globally recognized certifications including CE, UL, FCC, RoHS, and REACH, ensuring they meet rigorous international safety and environmental standards.

4. Does ARC Technology provide custom engineering (OEM/ODM) services?

Absolutely. We act as a critical bridge for global brands in Europe and North America. Utilizing our Taiwanese R&D and Global Production model, we provide comprehensive support from initial design and rapid prototyping to final installation and manufacturing scaling.

5. How do your solutions support energy efficiency and sustainability?

We specialize in Precision Energy Management. Our hardware provides high-precision power monitoring down to the micro-amp level, allowing utilities and consumers to track, analyze, and optimize their energy usage to meet global sustainability goals.

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