Phoenix Contact TB 4-PE I Protective Conductor Terminal Block

Technical Overview

Protective conductor terminal block with screw connection, rated 8 kV surge, supporting 0.5-6 mm² conductors, -60°C to 105°C operation, V0 flammability.

Key Features

Screw connection method for secure and reliable wiring
Rated surge voltage of 8 kV ensures robust electrical protection
Supports conductor cross sections from 0.5 mm² to 6 mm² (AWG 20-10)
Mounts on NS 35/7,5, NS 35/15, or NS 32 DIN rails for versatile installation
Green-yellow color for clear and immediate identification of protective earth
Wide operating temperature range from -60 °C to 105 °C
Flammability rating V0 according to UL 94 for enhanced safety
Degree of pollution 3 and overvoltage category III suitable for industrial environments

Technical Specification Matrix

Parameter	Value
Product Type	Ground terminal block / Protective conductor terminal block
Connection Method	Screw connection
Rated Surge Voltage	8 kV
Nominal Cross Section	4 mm²
Conductor Cross Section Solid (min-max)	0.5 mm² - 6 mm²
Conductor Cross Section Flexible (min-max)	0.5 mm² - 6 mm²
AWG Cross Section (min-max)	20 - 10
Screw Thread	M3
Stripping Length	8 mm
Torque	0.6 Nm ... 0.8 Nm
Color	Green-yellow
Insulating Material	PA
Flammability Rating (UL 94)	V0
Operating Temperature	-60 °C ... 105 °C
Storage/Transport Temperature	-25 °C ... 60 °C (short-term -60 °C to 70 °C)
Permissible Humidity (Storage/Transport)	30 % ... 70 %
Degree of Pollution	3
Overvoltage Category	III
Mounting Type	NS 35/7,5, NS 35/15, NS 32 (DIN rail)
Mounting Method	PE foot with mounting screw, M3
Physical Weight (kg)	0.02
Dimensions L x W x H (cm)	4.25 x 0.62 x 4.25

Industrial Applications

1. Industrial Control Panels for Machine Safety

This protective conductor terminal block is ideal for integrating into industrial control panels to establish a robust and identifiable protective earth (PE) connection for critical machinery and systems. It ensures operator safety and equipment protection against electrical faults.

Problem Solved

Provides a secure, clearly identifiable (green-yellow) grounding point for multiple conductors (0.5-6 mm²) within a control cabinet, preventing electric shock hazards and complying with safety standards. The 8 kV surge voltage rating offers robustness against transient overvoltages.

Protective earthingDIN rail mountingScrew connectionElectrical safetyMachine safetySurge protectionIndustrial control panel

2. Power Distribution Units in Harsh Environments

Suitable for grounding within power distribution units (PDUs) or sub-distribution boards, especially in challenging environments with significant temperature fluctuations, such as outdoor industrial enclosures or unheated facilities.

Problem Solved

The broad operating temperature range of -60 °C to 105 °C ensures reliable grounding continuity and performance even under extreme thermal conditions. Its robust PA insulating material and V0 flammability rating enhance fire safety in power systems.

Power distributionHarsh environmentWide temperature rangeFire safetyGrounding integrityIndustrial enclosures

3. Building Infrastructure for Data Centers

Applicable for creating a highly reliable grounding network within the electrical infrastructure of data centers and large commercial buildings, providing essential protective earthing for sensitive IT and building automation equipment.

Problem Solved

Offers dependable screw connections for both solid and flexible conductors up to 6 mm², critical for maintaining equipotential bonding and mitigating electromagnetic interference (EMI/RFI) in large-scale installations. Its compact 6.2 mm width enables high-density wiring in space-constrained electrical cabinets.

Building automationData center infrastructureEquipotential bondingEMI/RFI mitigationHigh-density wiringScrew termination