Weidmuller WDU 2.5 Feed-Through Terminal Block

Weidmuller WDU 2.5 feed-through terminal, order no. 1020000000

1020000000 is the Weidmuller WDU 2.5 feed-through terminal block with screw connection: the smallest size of the WDU feed-through series. It joins two conductors on one potential, snaps onto TS 35 rail and is made of Wemid insulating material in dark beige with a UL 94 V-0 flammability rating. Seven Star LLC supplies 1020000000 in Oman and the GCC as an independent supplier in Muscat; the datasheet lists a pack quantity of 100 pieces.

Control wiring and low-current signals: PLC digital I/O, relay coils, small instrument loops and 24 V distribution inside marshalling cabinets. Choose WDU 2.5 when the circuit is wired conductor-to-conductor with no need for a PE function, test disconnect or double level.

Decoding the type WDU 2.5

Technical specifications for 1020000000

How the 1020000000 clamps and carries current

The terminal uses a screw clamp that presses the conductor against a current bar. The clamping range runs from 0.05 mm² to 4 mm², and the stripping length is 10 mm. Tighten the M 2.5 screw with a 0.6 x 3.5 mm blade to between 0.4 Nm and 0.8 Nm; too little torque raises contact resistance, and too much can damage the conductor or the housing. The data sheet gives a contact resistance of 1.33 mΩ and a power loss of 0.77 W at rated current, which matters when many terminals sit close together in a hot cabinet.

Sizing WDU 2.5 for your circuit

The rated current of 24 A applies to the rated cross-section; with the largest wire the data sheet allows 32 A. Breaker size is chosen from the conductor and the load, and the terminal must carry at least that current with allowance for temperature. The rated impulse withstand voltage is 8 kV, and the rated voltage is 800 V. Approvals listed in the data sheet include UR and CSA (600 V, 20 A), and the terminal is marked for increased-safety (Ex eb) use under the ATEX and IECEx entries given in the data sheet.

Accessories and neighbouring sizes for 1020000000

The WDU family spans 2.5 mm² (1020000000), 4 mm² (1020100000), 6 mm² (1020200000), 10 mm² (1020300000), 16 mm² (1020400000) and 35 mm² (1020500000). An end cover plate is required at the end of each block, and cross-connectors can link adjacent terminals; ask us to confirm the matching cross-connector type for your size. Always use a cross-connector sized for the terminal, and group terminals with the same colour for each voltage level.

Installation and maintenance of WDU 2.5

Snap the terminals onto the rail, add an end stop on each side and an end cover plate at the end of the block, then wire with correctly stripped conductors; ferrules are recommended on flexible wire. Check torque with a calibrated screwdriver and mark checked terminals. Retighten at the first scheduled shutdown, and look for discolouration, which indicates a loose connection or overloaded circuit.

Typical applications in Oman and the GCC

It is the default for field wiring of 24 V and signal circuits because it accepts conductors from 0.05 to 4 mm² and keeps the strip narrow at 5.1 mm. In Oman and the GCC it is the usual size in junction boxes at wellheads, packaged-skid panels and instrument marshalling cabinets, where hundreds of points are needed and rail length is limited.

Information to send with an RFQ for 1020000000

• Exact order number 1020000000 (WDU 2.5) and the quantity, including spares or packs.
• Number of terminals needed and whether end plates and cross-connectors are required.
• Circuit current and conductor cross-section.
• Colour or marking requirements for your panel standard.
• Delivery location (Muscat, Sohar, Salalah or elsewhere in the GCC) and the date you need the goods.
• Any documents you need with the quotation, such as the datasheet or a compliance statement.

Storage, handling and spares for the Weidmuller 1020000000

Keep Weidmuller 1020000000 units in their original packaging until they are mounted. Store them indoors in a dry, dust-free room, away from direct sun and condensation. Panel shops in Oman and the GCC often hold stock in warehouses that get very hot in summer, so check that storage temperature stays within the limits given in the manufacturer datasheet.

• Check the label and order code on every unit against the drawing before it goes into the panel.
• Use the correct tool and tightening torque for the terminals, as given in the instructions supplied with the product.
• Keep a small number of spare units for each rating used on site, so that a failed or damaged part can be replaced without waiting for a new shipment.
• Record the order code in the panel documentation and the as-built drawings, so that maintenance teams can reorder the same part later.

When you plan spares for a project, group the Weidmuller 1020000000 with the other parts of the same panel in one RFQ. This keeps delivery dates aligned and makes it easier to confirm stock for the whole bill of materials at once.

Documents and quotation

The manufacturer data sheet for 1020000000 is attached on this page. It lists the ordering data, approvals, ratings and drawings, so please check its notes against your design before you order.

To request a quotation, send order number 1020000000, the quantity and your delivery location. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer; we will confirm availability and lead time for your order.