Weidmuller WDU 50N Feed-Through Terminal Block

Technical Overview

The Weidmüller WDU 50N is a high-performance feed-through terminal block designed for demanding industrial environments. Featuring a robust screw connection mechanism, it accommodates wire cross-sections from 10 mm² to 70 mm² and is rated for currents up to 150 A and voltages up to 1000 V. Constructed from dark beige Wemid insulating material, it offers superior thermal stability (up to 120°C continuous) and holds a UL 94 V-0 flammability rating. The closed-side housing design enables direct mounting on TS 35 DIN rails without the need for additional end plates, optimizing cabinet space. This unit is fully certified for hazardous locations (ATEX/IECEx Ex eb II C Gb), making it suitable for global applications in process engineering and energy sectors.

Key Features

Feed-through terminal block with secure screw connection technology
High rating of 1000 V and 150 A for heavy-duty applications
Wide clamping range accepting 10 mm² to 70 mm² conductors
ATEX and IECEx certified for use in hazardous explosive environments
Constructed from Wemid material with UL 94 V-0 flammability rating
Compact closed-side design eliminates need for end cover plates
Snap-on mounting compatible with standard TS 35 DIN rails
Wide operating temperature range from -60 °C to 130 °C

Technical Specification Matrix

Technical Parameter	Specification
Version	Feed-through terminal block, Screw connection, dark beige, 50 mm², 150 A, 1000 V
Order No.	1820840000
Type	WDU 50N
GTIN (EAN)	4032248318117
Depth (inches)	2.74 inch
Continuous operating temp., min.	-60 °C
Continuous operating temp., max.	130 °C
Basic material	Wemid
UL 94 flammability rating	V-0
Certificate No. (ATEX)	DEMKO14ATEX1338U
Certificate No. (IECEX)	IECEXULD14.0005U
Marking EN 60079-7	Ex eb II C Gb
Rail	TS 35
Type of connection	Screw connection
Clamping range, max.	70 mm²
Clamping range, min.	10 mm²
Clamping screw	M 6
Tightening torque, max.	6 Nm
Tightening torque, min.	3.5 Nm
Rated cross-section	50 mm²
Rated voltage	1,000 V
Rated current	150 A
Current at maximum wires	192 A
Rated impulse withstand voltage	8 kV
Certificate No. (cURusEX)	E184763
ETIM 9.0	EC000897
Depth	69.6 mm
Height	70 mm
Width	18.5 mm
Net weight	84.38 g

Industrial Applications

1. High-Power Industrial Switchgear Distribution

Utilized in the main power feed-in sections of industrial control panels to distribute high-amperage power (up to 150 A) to downstream subsystems and motor drives.

Problem Solved

Provides a safe, high-density connection point for large cross-section conductors (up to 50 mm²) in confined cabinet spaces without requiring additional end covers, reducing installation width.

150 A Rated Current1000 V Rated VoltageTS 35 DIN RailScrew ConnectionWemid Material

2. Hazardous Area Instrumentation & Control

Deployed in explosive atmosphere zones (Zones 1 and 2) requiring Ex eb II C Gb certified components for safe signal and power transmission in chemical and oil & gas facilities.

Problem Solved

Ensures full compliance with stringent ATEX and IECEx standards for equipment operating in environments with flammable gases or dusts, maintaining connection integrity under thermal stress.

ATEX CertifiedIECEx CertifiedEx eb II C GbDEMKO14ATEX1338UIECEXULD14.0005U

3. Heavy Machinery Power Rail Assembly

Integrated into the power distribution backbone of heavy automation machinery where high torque retention and vibration resistance are critical for reliable 1000V DC/AC operation.

Problem Solved

Delivers robust screw-tightened connections (up to 6 Nm torque) that resist loosening during machine operation and vibration, ensuring long-term operational safety and reduced maintenance.

6 Nm Tightening TorqueVibration ResistanceDirect MountingSnap-on InstallationB10 Gauge