Circular connector systems
RST® circular connector systems provide secure, pluggable connections in demanding environments. The portfolio ranges from miniature connectors to high-current systems and includes pre-assembled power distribution and direct device connection solutions.
Flawless Connections for Toughest Conditions:
RST® Connectors
Wherever electrical connections face high demands, you need solutions that deliver flawless performance, no matter how tough the conditions are. That’s where our RST® connectors shine. Designed for high-demand environments, these connectors ensure a tight seal, exceptional mechanical strength, and unmatched reliability – even in the toughest sites.
Thanks to their compact design, RST® connectors fit seamlessly into the tightest spaces. Pre-wired and color-coded, they make installation fast, error-free, and safe, following the Plug&Play principle. With RST®, you’ll save time and guarantee safety on every project.
GET YOUR HANDS ON!
sample case RST20I3
Explore the versatility of our RST20i3 connectors with our comprehensive sample case. This kit includes a selection of 3-pole RST20 connectors in black coding, featuring both male and female connectors, device connectors, and cover pieces. Ideal for hands-on evaluation, this assortment allows you to experience the quality and functionality of our RST® CLASSIC line firsthand. Perfect for professionals seeking reliable and efficient connection solutions.
AREAS OF APPLICATION
Systems
Advertising
Building
RST® Connectors
for Every Application
As electricians, you need connectors that perform reliably in every situation. With our expertise across industries, we deliver solutions tailored to your needs – from miniature connectors for the tightest wiring spaces to powerful options for large cross-sections.
The RST® round connectors excel in:
- Machinery and plant manufacturing
- Building installations
- HVAC systems
- Lighting technology
- Combustion and conveying technology
- Wind power, photovoltaics, elevators, and escalators
Designed for demanding environments, RST® connectors ensure maximum performance, durability, and flexibility. No limits, no compromises – your connection, perfected.
Fast. Reliable. Economical: Master IP-Rated
Electrical Installations
Discover how IP-rated, pluggable systems revolutionize electrical installations – indoors, outdoors, and in demanding environments.
In this webinar recording, you’ll learn:
- The benefits of pluggable installations
- Everything about the RST® product family
- Installation tips and best practices
Save time, reduce errors, and ensure safety in your projects. Ready to optimize your installations? Watch the recording now!
continue to the recording
YOUR ADVANTAGES AT A GLANCE
SAVE TIME AND COSTS
Reduce installation and assembly time, and therefore also installation costs, by coupling and uncoupling quickly with the Plug&Play principle. Be faster than any screw or bayonet connection.
DURABLE AND REUSABLE
Create a long-term connection. Our connectors are intended to be used again and again, thanks to their robust design and our extremely high demands on the quality of the materials we choose.
FLEXIBLE AND EFFICIENT
Simplify modifications and maintenance with easy disassembly and pre-wired connectors – even during operation. Plug&Play means quick and safe coupling and uncoupling with little downtime.
COLOR CODING FOR ADDITIONAL PROTECTION
With mechanical coding and over 20 color options, RST® connectors make installation intuitive and error-free, even for less experienced users. Faulty wiring and troubleshooting are eliminated, whether for low-voltage, emergency power, or main power systems. Say goodbye to cable screw connections – the Plug&Play principle revolutionizes your electrical connections!
All variants and options can be found in our shop.
IP-PROTECTION – ROBUST, STABLE AND RESISTANT
What you can expect
from the RST® connector series
Depending on the respective IP rating of the different RST® models, these round connectors excel in the following areas:
- Comprehensive protection against jets of water, including high-pressure and steam jets
- Temporary and prolonged immersion
- Complete protection against contact
- Protection against foreign objects, such as dust deposits and dust ingress
- High reliability to ensure a stable and continuous electronic connection
RELIABLE PROTECTION AGAINST MOISTURE AND WATER INGRESS
Proven connector technology for harsh environments — tested for durability, sealed for safety.
HIGH STANDARDS YOU CAN TRUST
Decades of experience ensure our connectors meet the highest standards of quality and durability.
- IP68 tested (2 h at 3 m depth)
- High-pressure splash water & mechanical stress tested (IK impact)
- Meticulous in-house testing ensures long-term reliability
INTERNAL WATERSTOP FOR EXTRA PROTECTION
Each contact features its own seal to prevent moisture ingress via capillary effect.
- Prevents infiltration from condensation & fluctuations
- Ensures long-lasting safety
- Ideal for critical installations
LONGITUDINAL SEALING – TARGETED PROTECTION AGAINST MOISTURE
Moisture can travel along the cable core and cause insulation breakdown. Our longitudinal sealing encapsulates the connector interface to stop moisture from reaching connected devices.
Benefits at a glance:
- Prevents water ingress via the cable core
- Reduces downtime and maintenance needs
- Ideal for outdoor, humid or high-risk environments
- Available for RST® MICRO, RST® MINI (MOLA), and RST® CLASSIC (6-/7-pole and new 3-pole)
PLUGGABLE VS. TRADITIONAL
THE FUTURE IS PLUGGABLE
See at a glance the direct time comparison between a pluggable installation and a conventional installation for outdoor use.
time is money: check it out
FOUR ESSENTIAL RST® SYSTEM COMPONENTS,
ONE PERFECT SOLUTION
DESIGNED FOR SEAMLESS INTEGRATION:
Our electrical installation system, consisting of connectors, pre-assembled cables, distributors, and device connections, is designed to implement any project effortlessly and error-free. Each component is precisely tailored to its task to ensure seamless integration.
CONNECTORS
From the miniature connector with the highest IP to the powerful connector for large cross sections .
- 2 to 7-pole models, 250V/400V, 8 A to 50 A
- PLUG&PLAY
- Color coding
- Reliable protection
CABLE ASSEMBLIES
For a fast pluggable supply of electrical energy to the end device.
With the cable assembly with free end or as a connecting cable, we offer various connection options and maximum flexibility.
DISTRIBUTORS
Pre-wired distributors are plugged into the installation.
The distributors allow branched energy and signal transmission to be devices.
DEVICE CONNECTORS
Devices can be plugged into the installation on site.
The device connectors are integrated in the corresponding boreholes of the housing of devices and constitute the interface of the device to the RST® system.
OVERVIEW OF THE RST® CONNECTOR PRODUCT FAMILY
FIND THE PERFECT RST® CIRCULAR CONNECTOR
We offer robust circular connectors in various versions to meet your specific requirements. Not sure which one is right for you? We’re happy to advise you!
OUR EXPERTS
PLUGGING INSTEAD OF SCREWING
“With the RST® connector series, Wieland Electric, as the market leader, offers a complete installation system with increased protection (IP6X). This modern installation method enables a universally pluggable electrical infrastructure, from the distributor to all electrical devices.”
Wolfram Hohmann
Product Management – Modular Pluggable Systems
DOWNLOADS
Our eShop has moved
Our website and eShop are now combined on one platform. Product information and shop features are now available directly here. Use the search or select a product category.
Already have a customer account? Please follow the instructions when signing in.
Need assistance? Contact our eShop support team by email at ebusiness@wieland-electric.com.