Phoenix Contact UT 4-TG-EX Disconnect Terminal Block

Technical Overview

Disconnect terminal block with 500V/20A, screw connection for 26-10 AWG, DIN rail mount, and -60°C to 110°C operating range.

Key Features

Disconnect function for safe circuit isolation
Screw connection method ensures a secure and stable setup
Supports a nominal voltage of 500V and a nominal current of 20A
Mountable on standard DIN rails: NS 35/7.5 or NS 35/15
Double bridge shaft allows for individual potential distribution and supply
Compact design combined with high current carrying capacity
Suitable for process technology due to Ex nA approval
Offers flexible multi-conductor connection, accommodating conductors with or without ferrules
Compatible with standardized bridging, marking, and testing accessories
Wide operating temperature range from -60 °C to 110 °C

Technical Specification Matrix

Parameter	Value
Nominal Voltage	500 V
Nominal Current	20 A
Connection Method	Screw Connection
Rated Cross Section	4 mm²
Conductor Cross Section Rigid	0.14 mm² - 6 mm²
Conductor Cross Section Flexible	0.14 mm² - 6 mm²
AWG Range	26 - 10
Mounting Type	DIN Rail NS 35/7.5, NS 35/15
Color	Gray
Number of Connections per Level	2
Number of Levels	1
Overvoltage Category	III
Degree of Pollution	3
Rated Surge Voltage	6 kV
Maximum Power Dissipation for Nominal Condition	1.02 W
Screw Thread	M3
Tightening Torque	0.6 - 0.8 Nm
Stripping Length	9 mm
Operating Temperature Range	-60 °C to 110 °C
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	5.78 x 0.62 x 4.91

Industrial Applications

1. Hazardous Area Control Panel Power Disconnect

This terminal block is ideal for safely distributing power within control panels located in potentially explosive environments (Zone 2, e.g., oil and gas refineries). Its Ex nA approval allows for secure use in such areas, and the disconnect function provides a safe means to isolate individual circuits for maintenance or troubleshooting without de-energizing the entire system.

Problem Solved

Safely isolates power circuits in hazardous industrial environments, facilitating maintenance and troubleshooting while complying with Ex nA safety standards for explosion protection.

Ex nA approvalZone 2Disconnect function500V20ADIN rail mountProcess industryOil & Gas

2. Industrial Machine Circuit Maintenance Disconnection

In complex industrial machinery, this disconnect terminal block can be used to isolate specific control or power circuits (up to 500V/20A) for safe servicing, repair, or component replacement. Its robust screw connection ensures reliable electrical contact, and the compact design helps save space within crowded control cabinets.

Problem Solved

Provides a clear and reliable method to de-energize and isolate parts of a machine's electrical system, enhancing safety during maintenance procedures and reducing downtime.

Disconnect terminal500V20AScrew connectionDIN railMachine buildingCircuit isolation

3. Outdoor Industrial System Wiring in Extreme Temperatures

The wide operating temperature range of -60 °C to 110 °C makes this terminal block suitable for outdoor electrical enclosures or equipment located in environments with significant temperature fluctuations, such as Arctic regions or desert installations. It provides a robust and reliable connection point for wiring up to 6mm² (10 AWG) in these challenging conditions.

Problem Solved

Ensures stable and safe electrical connections in extreme hot or cold industrial environments where standard terminal blocks might fail due to temperature constraints.

-60°C to 110°CWide operating temperatureScrew connection0.14-6mm²DIN railOutdoor applications