Phoenix Contact UKH 50 BU High-Current Terminal Block

Technical Overview

High-current terminal block, 1000V/150A, -60°C to 105°C, screw connection. ATEX Ex rated for hazardous areas.

Key Features

High current (150 A) and voltage (1000 V) ratings.
Strong and reliable screw connection method ensures secure contact.
Housing constructed from robust and durable polyamide material.
Wide flexible operating temperature range from -60°C to +105°C.
Universal foot design supports mounting on NS 35/7,5, NS 35/15, and NS 32 DIN rails.
Low contact resistance achieved through an optimized ribbing design.
Suitable for connecting both aluminum and copper conductors.

Technical Specification Matrix

Parameter	Value
Nominal Voltage	1000 V
Nominal Current	150 A
Rated Surge Voltage	8 kV
Nominal Cross Section	50 mm²
Conductor Cross-Section Rigid	16 mm² - 70 mm² (6 AWG - 1/0 AWG)
Conductor Cross-Section Flexible	25 mm² - 70 mm² (4 AWG - 2/0 AWG)
Connection Method	Screw connection
Screw Thread	M6
Tightening Torque	6 Nm - 8 Nm
Stripping Length	24 mm
Mounting Type	DIN rail (NS 35/7,5, NS 35/15, NS 32)
Color	Blue (RAL 5015)
Overvoltage Category	III
Degree of Pollution	3
Operating Temperature Range	-60 °C ... 105 °C
Flammability Rating	UL 94 V-0
Physical Weight (kg)	0.12
Dimensions L x W x H (cm)	7.05 x 2 x 7.58

Industrial Applications

1. Hazardous Area Power Distribution in Chemical Plants

Used for reliable power connections within control cabinets or junction boxes located in Zone 1 or Zone 2 hazardous areas of chemical processing plants.

Problem Solved

The ATEX Ex rating ensures compliance with safety regulations for explosive atmospheres, providing a secure and compliant high-current (150A) and high-voltage (1000V) connection solution for critical machinery. Its wide operating temperature range (-60°C to 105°C) handles extreme industrial environments.

ATEX Exhazardous areachemical processinghigh currenthigh voltagescrew connectionwide temperature range

2. Heavy-Duty Industrial Machinery Power Termination

Serves as a primary power termination point for large motors, heating elements, or other high-power industrial machinery in manufacturing facilities or heavy industry.

Problem Solved

The 150A / 1000V rating and robust screw connection with a tightening torque of 6-8 Nm provide a secure, low-resistance connection for large conductors (up to 70 mm²), preventing power loss and ensuring stable operation of high-demand equipment. DIN rail mounting simplifies installation in industrial control panels.

High currenthigh voltagescrew connectionlarge conductor cross-sectionDIN rail mountingindustrial machinery

3. Renewable Energy System Interconnection (e.g., Solar Inverter Output)

Utilized to safely and efficiently connect the DC output of large solar inverters or battery storage systems to main distribution panels.

Problem Solved

The 1000V voltage rating and 150A current capacity are suitable for the DC power levels often found in commercial/utility-scale solar installations. The secure screw connection accommodates solid or flexible conductors (16-70mm²) and provides a durable, vibration-resistant termination critical for long-term outdoor or cabinet-mounted renewable energy infrastructure.

Renewable energysolar inverterbattery storageDC power1000V150Ascrew connectionlarge conductors