Weidmüller WDU 2.5 Screw Feed-Through Terminal Block

The Weidmüller WDU 2.5 is a DIN EN 60947-7-1 rated screw-clamp feed-through terminal block designed for 2.5 mm² conductor termination in industrial panel wiring, marshalling cabinets, and instrumentation junction boxes across the full range of Saudi oil and gas, petrochemical, and power generation projects. The symmetrical screw clamp accepts stranded conductors from 0.2 mm² to 4 mm² with a single-hole landing under the clamp plate, allowing both fine-wire instrument cables and solid building-wire conductors to be secured without ferrule bridging. The nominal rating of 24 A / 500 V AC places the WDU 2.5 comfortably within the standard 24 V DC instrument loop and 110/230 V AC control wiring regimes used in Saudi ARAMCO DCS and PLC marshalling panels. Weidmüller's direct-lug contact system (as distinct from the intermediate bridge of some competitors) minimises contact resistance and ensures stable signal integrity over the service lifetime of the panel, a critical requirement for 4–20 mA HART instrument loops in ARAMCO processing plants.

The WDU 2.5 mounts on standard 35 mm TS 35 (DIN rail) with a snap-in foot that locks without tools and releases with a standard screwdriver, simplifying both initial panel build and the field replacement of individual terminals during plant maintenance windows. The 5 mm pitch between terminal positions is IEC-standard and allows Weidmüller's complete Klippon accessories portfolio — inserting labels, push-in bridges, end plates, marker cards, and earth terminal inserts — to be intermixed freely within the same terminal strip. The compact profile allows panel builders in Jubail, Yanbu, and Riyadh to achieve high terminal density in MCC and DCS marshalling cabinets without compromising wire-entry access or IEC 61439 working-space clearances. Colour options (grey, blue, yellow-green, red) provide a coded segregation system for instrument signal, control, neutral, and protective-earth circuits within a single terminal strip — a requirement of both IEC 60204-1 and ARAMCO's General Instruction GI-0002.

In the Saudi instrument panel fabrication sector, the WDU 2.5 is one of the two most widely specified DIN-rail terminal blocks alongside Phoenix Contact CLIPLINE UT 2.5, and it is cited as an acceptable alternative in many ARAMCO EPC project specifications where Phoenix Contact is the primary listed brand. Saudi panel shops in Jubail Industrial City, the Second Industrial City in Riyadh, and the Dammam fabrication zone use Weidmüller WDU terminals as their standardised base terminal block across generations of control-room, wellhead, and topsides panel designs. SABIC instrumentation panels at the Al-Jubail and Al-Yanbu petrochemical complexes carry WDU 2.5 blocks as the standard field-loop termination. The NEOM smart-city infrastructure electrical panels in Tabuk and the adjacent Sharma industrial zone specify both Phoenix Contact and Weidmüller as acceptable standard terminals, and Razz Middle East supplies both brands from local stock to contractors on these projects.

Razz Middle East maintains stock of the complete WDU 2.5 range — grey feed-through, blue neutral, yellow-green earth insert, and red 24 V positive bus — in both bare and pre-assembled terminal strip formats. Standard loose terminal delivery is available from Riyadh stock within 24 hours; factory-assembled terminal strips with Weidmüller M-series marker cards and end-plate sets are assembled in our Jeddah panel-support facility and can be dispatched within 48 hours for most standard configurations. Our team provides selectivity-to-standard cross-reference documents comparing WDU 2.5 to Phoenix Contact UT 2.5 and ABB ENTRELEC equivalents, enabling Saudi EPC procurement teams to substitute brands within approved-vendor lists without design review. All WDU 2.5 terminals are supplied with Weidmüller factory test reports and CE declarations of conformity, and import customs clearance documentation for SASO.