Plug-in terminal block WT series

screw connectionspringpush-in

Announcement
The selos NEW GENERATION is a modernized, consolidated terminal block series combining the proven product lines fasis WKFN, fasis WTP and selos WT into one optimized, fully lead-free family designed for industrial applications and long-term availability.

Your benefits at a glance

• Future-proof: Fully lead-free (RoHS) without exceptions.
• Simplified: One series with a unified accessory system for maximum cross-compatibility.
• Extended: New push-in versions (WTPN) covering 2.5 mm² and 6 mm² in addition to the standard range.
• Market-oriented: Alignment with established standards and modern connection technologies.
• Flexible: 1:1 replacement for screw terminals and straightforward migration from spring-clamp to push-in connections.

Timeline

• Reveal — 25 Nov to 27 Nov 2025: First public presentation at SPS 2025 trade fair.
• Transition phase — Q1 2026 to 31 Dec 2026: Both product generations available in parallel to ensure a smooth migration.
• Final order date (fasis WKFN, fasis WTP, selos WT) — 1 May 2026: Last date to place orders for the phased-out series.
• Complete phase-out — 31 Dec 2026: Legacy portfolio discontinued by year-end; non-RoHS products unlikely to be supplyable from mid-2027.

New product series — Overview

• WTPN – Push-in technology: Fast, maintenance-free push-in connections with high contact force for vibration-resistant installations; optimized for low-voltage power distribution and rapid assembly.
• WTN – Screw connection technology: Proven screw/cage-clamp terminals providing wide conductor range, compatibility with ferrules and high mechanical resistance; suitable for heavy-duty and high-cross-section applications.

Comparison: current portfolio vs. selos NEW GENERATION

• Current series: fasis WKFN, fasis WTP, selos WT → New series: selos WTPN / selos WTN.
• Connection types: Screw, spring-clamp, limited push-in → Screw & push-in.
• Conductor range: Standard intermediate sizes → WTN: 1.5 – 240 mm² (screw); WTPN: 1.5 – 16 mm² (push-in) with dedicated 2.5 and 6 mm² terminals.
• Design & variants: Larger form factors → More compact designs including multi-tier variants (up to 66% space saving with 3-tier versions).
• RoHS compliance: Partial → Fully RoHS compliant (lead-free) without exceptions.
• Marking & accessories: Series-specific accessories → Unified jumpers, reducing jumpers and endless printing system for flexible marking.

Support & transition help
Cross-reference tools and comparison lists map old references to selos NEW GENERATION alternatives. Technical documentation, planning literature and migration guides are provided to support design-in and replacement decisions.

Downloads (available documents)

• Flyer: Terminal Blocks Update (PDF)
• Brochure: Terminal Blocks Overview (PDF)
• Cross-Reference List: selos & fasis (XLSX)

Technical specifications

• Series name: selos NEW GENERATION
• RoHS: Fully lead-free (compliant without exceptions)
• Push-in series (WTPN): Conductor range 1.5 – 16 mm²; additional terminals for 2.5 mm² and 6 mm²
• Screw series (WTN): Conductor range 1.5 – 240 mm² (screw connection)
• Multi-tier compact design available — up to 66% space saving (3-tier variant)
• Unified accessory concept (jumpers, reducing jumpers, endless printing system)
• Transition timeline: Reveal 25–27 Nov 2025; Transition Q1 2026–31 Dec 2026; Final order date for old series 1 May 2026; Complete phase-out 31 Dec 2026
• Support and documentation availability guaranteed through 31 Dec 2027