Weidmuller WDU 70N-35 Feed-Through Terminal Block

Technical Overview

The Weidmüller WDU 70N/35 is a high-performance feed-through terminal block designed for heavy-duty industrial power transmission. Featuring a robust Wemid thermoplastic housing with a UL 94 V-0 flammability rating, this component ensures safety and durability in demanding environments ranging from -60°C to +130°C. It utilizes a proven screw connection system capable of accommodating conductors up to 70 mm² (nominal) and 95 mm² (clamping range), delivering a rated current of 192 A at 1000 V. The unit is optimized for TS 35 DIN rail mounting and includes explosion-tested certification (ATEX/IECEx) for hazardous area applications.

Key Features

Feed-through terminal block with screw connection technology
Rated for 1000 V and 192 A (IEC standards)
Accommodates wire cross-sections from 16 mm² to 70 mm² (nominal)
Wide operating temperature range of -60 °C to +130 °C
ATEX and IECEx certified for hazardous environments
Robust Wemid construction with UL 94 V-0 flammability rating
Clamping yoke system allows secure connection of two conductors per point
Mounts on standard TS 35 DIN rail
Closed side design requires no end plate

Technical Specification Matrix

Technical Parameter	Specification
Version	Feed-through terminal block, Screw connection, 70 mm², 1000 V, 192 A, dark beige
Order No.	9512190000
Type	WDU 70N/35
GTIN (EAN)	4008190403874
Depth including DIN rail	86 mm
Material	Wemid
Colour	Dark beige
Operating Temperature Range	-60 °C to +130 °C
UL 94 flammability rating	V-0
Rated voltage	1000 V
Rated current	192 A
Rated cross-section	70 mm²
Rated impulse withstand voltage	8 kV
Power loss (IEC 60947-7-x)	6.14 W
Clamping screw	M 8
Tightening torque	6...12 Nm
Clamping range	16 mm² - 95 mm²
Stripping length	22 mm
Standards	IEC 60947-7-1
Explosion-tested version	Yes (ATEX, IECEx)
Certificate No. (ATEX)	DEMKO14ATEX1338U
Certificate No. (IECEX)	IECEXULD14.0005U
Current (cURus)	150 A
Voltage (cURus)	600 V
Mounting Rail	TS 35
ETIM 8.0	EC000897
Depth	85 mm
Height	75 mm
Width	20.5 mm
Net weight	118.93 g

Industrial Applications

1. Main Power Feed-In for Control Cabinets

Used as the primary power entry point for large-scale industrial control panels and switchgear assemblies.

Problem Solved

Provides a secure, high-current interface for terminating large cross-section power cables (up to 70 mm²) within a compact DIN-rail footprint, reducing space requirements compared to traditional bolt-on lugs.

high current terminationpower distributionswitchgear feed-in192A capacity

2. Hazardous Location Power Distribution

Deployed in petrochemical and processing plants requiring ATEX and IECEx certified components for explosive atmospheres.

Problem Solved

Ensures compliance with strict safety standards (Ex eb II C Gb) for electrical connections in Zone 1 and Zone 2 environments while maintaining high voltage/current transmission capabilities.

ATEX certifiedIECEx complianceEx eb II C Gbhazardous area wiring

3. Heavy Machinery and Drive Systems

Integration into the power supply circuits of heavy electric motors, drives, and automation machinery.

Problem Solved

Delivers a vibration-resistant screw connection with high torque retention (up to 12 Nm), preventing connection loosening under the mechanical stress and thermal cycling typical of heavy industrial equipment.

vibration resistancescrew connectionhigh torquemotor supply