NEW PRODUCT SERIES

SELOS NEW GENERATION
THE TERMINAL BLOCK PORTFOLIO AT A GLANCE

SHAPING THE FUTURE – WITH OUR OPTIMIZED TERMINAL BLOCK PORTFOLIO

The demands on modern connection technology are constantly evolving – and so are we. According to the latest information from the EU, the new RoHS regulation requiring lead-free products is expected to come into force in mid-2027. We are using this regulatory change as an opportunity to fundamentally modernize our terminal block portfolio – with a focus on sustainability, efficiency, and long-term viability.

With the new selos NEW GENERATION series, we are combining the proven product lines fasis WKFN, fasis WTP, and selos WT into one optimized series. The result: a consistent, simplified system with a unified accessory concept – compatible with all connection types, whether screw or push-in.

YOUR BENEFITS AT A GLANCE:

  • Market-oriented: Focus on established standards and modern technologies
     
  • Flexible – New push-in terminals for 14 AWG and 10 AWG, ideal for a wide range of applications
     
  • Sustainable – 100% RoHS-compliant (lead-free) without exceptions
     
  • Versatile – Extensive accessory system for both push-in & screw technology → greater efficiency, higher flexibility, and more options!
     
  • Compact – Multi-tier design saves up to 66% space with the 3-tier version
     
  • Digital support – EPLAN data and selos PLAN online configurator for seamless project planning

As part of this forward-looking realignment, the existing terminal block portfolio – fasis WKFN, fasis WTP, and selos WT – will be replaced by the new selos NEW GENERATION series.

To provide you with maximum planning reliability, we have clearly outlined the key milestones and transition dates for you. The following overview shows at a glance when specific products will be phased out and when the new series will become available – communicated transparently, traceably, and well in advance.

TIMELINE FOR YOUR TRANSITION TO THE NEW PRODUCT GENERATION

Milestone
Date
Description
New series product launch

Jan 1 2026

Both product generations will be available in parallel to ensure a smooth transition.
Final order date for old seriesMay 1 2026Final date to place orders for the phased-out series (fasis WKFN, fasis WTP and selos WT).
Complete phase-out of the old portfolioDecember 31 2026From mid-2027, it will highly likely no longer be possible to supply non-RoHS-compliant products. Therefore, the portfolio will be fully discontinued by year-end.

NEED SUPPORT DURING THE TRANSITION?
WE’RE HERE TO HELP YOU.

Do you have questions or need individual support?
Our team is here to help – personally, competently, and with commitment. Together, we’ll find the best solution for your application.

Whether through our sales team, technical support, our convenient callback service, or simply via the contact form – we look forward to hearing from you and supporting your needs.

Call up contact options

SELOS NEW GENERATION 
– THE NEW SERIES AT A GLANCE

WTPN – PUSH-IN TECHNOLOGY: 
FAST, MAINTENANCE-FREE, FUTURE-PROOF

The WTPN series terminal blocks are based on modern push-in technology, enabling tool-free, time-saving wiring. High contact forces ensure vibration-resistant, durable, and maintenance-free connections – ideal for low-voltage power distribution in a wide range of industrial applications.

  • Vibration-resistant design for maximum operational safety
     
  • Maintenance-free – no retightening needed, less downtime
     
  • Ultra-fast installation thanks to PUSH-IN connection technology

WTN – SCREW CONNECTION TECHNOLOGY: 
PROVEN, ROBUST, FLEXIBLE

The new screw terminal blocks are true all-rounders. Thanks to their simple handling, the proven cage clamp connection is a universally applicable solution for all conductor types – and is widely used across the globe.

  • Maximum flexibility in conductor selection – with or without ferrule
     
  • Reliable hold, even under extreme mechanical loads
     
  • Proven worldwide – in use millions of times over
YOUR ADVANTAGE WITH SELOS NEW GENERATION – ALL KEY POINTS AT A GLANCE
CURRENT PRODUCT SERIES
fasis WKFN, fasis WTP and selos WT
New product series 
selos WTPN / selos WTN
Connection types

Screw, spring clamp, push-in (limited)

Screw & push-in

Variety of versions

Standard size like 2.5/4 mm² or 6/10 mm²,
no optimized intermediate steps

Product series 
WTN from 1.5 – 240 mm² (screw connection)
WTPN from 1.5 – 16 mm² (push-in),
additional terminals for 2.5 and 6 mm²

Design & variants

Larger form factors, no compact multi-tier variants

More compact design,
including multi-tier variants 
→ up to 66 % space saving with a 3-tier-version

RoHS compliance (lead-free / valid from mid-2027, according to current legislation)

Partially fulfilled

Fully RoHS compliant (lead-free) without exceptions

Marking & accessories

Different accessories per series and connection type

Product specific jumpers and reducing jumpers for Push-In & screw technology. Endless printing system added for more flexibility and faster markings

ALL UPDATES ON THE PORTFOLIO DEVELOPMENT
By subscribing, you’ll stay up to date on the launch of the new product generation.

SUBSCRIBE TO NEWSLETTER

FAQ – WELL INFORMED – QUICKLY FOUND

Our FAQs answer the most common questions about the portfolio transition, products, services, and your next steps – concise, clear, and always accessible.

1. Why is the product range being updated?

  • We continuously enhance our product portfolio to offer you future-proof, more efficient, and sustainable solutions.
  • With the new selos NEW GENERATION series, we fully comply with the latest EU regulations requiring the use of lead-free materials – without exceptions.

2. Is there an official end-of-life (EOL) date?

Yes. As part of the portfolio evolution, the following dates apply for the planned transition to selos NEW GENERATION:

  • Final order date: May 1, 2026
  • Final delivery date: December 31, 2026
  • Support and documentation availability: until December 31, 2027

You can also find these dates further up on this page or via the provided link.

3. How long will the transition phase last?

The launch of the selos NEW GENERATION series marks the beginning of a transition phase in which both the existing product portfolio and the new series will be available until the end of 2026 – ensuring a smooth and predictable transition with maximum planning security. After that, only the new series will be permanently available.

4. Is the current product portfolio still available to order?

Yes, orders for our current product series – fasis WKFN, fasis WTP, and selos WT – can be placed until May 1, 2026.

5. Is there a direct successor product?

Our cross-reference list (XLS, 210 KB) provides a comprehensive overview and allows for a precise comparison between the current series – fasis WKFN, fasis WTP, and selos WT – and our new optimized selos NEW GENERATION series. It also shows which product from selos NEW GENERATION is the most suitable alternative for your existing solution.

6. Is the new product fully compatible?

The selos NEW GENERATION series is compatible with a wide range of applications and can be seamlessly integrated.
Depending on the specific use case, there may be minor differences.

We recommend reviewing the technical details carefully or contacting our technical support – we are happy to help you select the best product for your needs.

7. How is the transition to selos NEW GENERATION being managed?

We’ll guide you step by step: our cross-reference list (XLS, 210 KB) provides a comprehensive overview for a precise comparison between our current series – fasis WKFN, fasis WTP, and selos WT – and the new, optimized selos NEW GENERATION series.

8. How does Wieland support OEMs and distributors during the transition?

Our goal is to ensure a structured, transparent, and smooth transition to the new product generation – in close collaboration with you.
We offer personal support, defined processes, and reliable planning from day one.

  • During the first 9 months following the official announcement, you can communicate your requirements and coordinate orders.
     
  • Deliveries can then continue for up to 6 months to ensure seamless supply.
     
  • In parallel, the new selos NEW GENERATION series will already be available – enabling early sampling, qualification, and integration into your processes.

9. Is there support available for the transition (e.g., comparison tables, tools)?

Yes – we’ll guide you step by step. Our cross-reference list (XLS, 210 KB) provides a comprehensive overview for a precise comparison between our current series – fasis WKFN, fasis WTP, and selos WT – and the new, optimized selos NEW GENERATION series.

10. What does the product transition mean for existing contracts and supply agreements?

All existing contracts will remain valid during the regular transition phase. For specific requirements – such as extended spare parts availability – individual agreements (e.g., regarding stockholding) can be arranged. Please speak with your sales representative.

11. How will support and service be ensured during the transition?

Throughout the entire transition phase, our sales team and technical support will be at your side. Both teams are involved in the process from the outset, ensuring smooth implementation, quick resolution of technical questions, and reliable support – so you can always count on personal and competent assistance.

12. Will customer support remain available after the transition?

Yes – even after the transition, our customer support team will remain reliably available to you. We will also provide clear answers to frequently asked questions in the form of a dedicated FAQ section.

13. How long will I receive technical support for the previous product series?

We guarantee support for the current product series – fasis WKFN, fasis WTP, and selos WT – until December 31, 2026. After that, the most important technical documents will remain available in our archive to ensure reliable documentation and long-term traceability.

14. Where can I find technical documentation for the current product portfolio?

All technical documentation and product-related information for the current portfolio remains available in the Wieland eShop.
Simply search by article number to directly access datasheets, user manuals, and information on spare parts and accessories.

15. Can spare parts or accessories still be ordered?

Orders for spare parts and accessories can be placed until May 1, 2026. Delivery will be possible until December 31, 2026 at the latest.

16. Who can I contact if I have further questions?

For commercial questions, our sales team will be happy to assist you. For technical topics, our technical support is at your service. You’ll find all relevant contact details in the contact section below.

Questions about the upcoming changes?
Our sales team is happy to support you in selecting the right successor products.

GET IN TOUCH NOW

RESOURCES

To make the transition to the new portfolio as smooth as possible for you, we have prepared a structured product phase-out scenario. Below you will find all relevant information and documents:

Brochure: Terminal Blocks Overview

0511.1 | 8 MB

Americas Cross-Reference List: selos & fasis

195 KB

Contact

Technical Consultation: Industry Solutions 
Our specialists are happy to assist you:

CALL UP CONTACT FORM
Corporate - English
Industries
BackIndustriesAll IndustriesBuilding TechnologyLighting TechnologyMachine BuildingWind PowerHorticultureEV ChargingPREFAB
Products
BackProductsElectrical InstallationConnection TechnologySafety TechnologyIndustrial CommunicationElectronic + Interface
Support
BackSupportServiceFind a DistributorTrainingServices for machine safetySoftware & AppsInfoportalDownloadsWhitepaper
Company
BackCompanyAbout usPurchasing & QualityNewsCredentials
Career
BackCareerWieland as an EmployerPupilsStudentsGraduatesExperienced Professionals