Phoenix Contact TB 3 I Feed-Through Terminal Block

Technical Overview

Dark gray feed-through terminal block, 800 V, 24 A. Features screw connection for 0.5-4 mm² conductors, mountable on DIN rails. Operates from -60°C to 110°C.

Key Features

Secure screw connection method for reliable wiring.
Supports conductor cross sections from 0.5 mm² to 4 mm².
Designed for mounting on NS 35/7,5, NS 35/15, or NS 32 DIN rails.
Wide operating temperature range from -60 °C to 110 °C.
Features a dark gray (traffic gray B) color.
Rated surge voltage of 8 kV for enhanced protection.
Flammability rating of V0 according to UL 94.

Technical Specification Matrix

Parameter	Value
Product Type	Feed-through terminal block
Nominal Voltage	800 V
Nominal Current	24 A
Number of Connections	2
Number of Positions	1
Connection Method	Screw connection
Rated Cross Section	2.5 mm²
Conductor Cross Section Range	0.5 mm² - 4 mm²
Mounting Type	NS 35/7,5, NS 35/15, NS 32 (DIN rail)
Color	Dark gray (traffic gray B RAL 7043)
Rated Surge Voltage	8 kV
Maximum Power Dissipation (Nominal Condition)	0.77 W
Flammability Rating (UL 94)	V0
Operating Temperature Range	-60 °C ... 110 °C
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	3.5 x 0.52 x 4.25

Industrial Applications

1. Industrial Control Panel Wiring

This terminal block is an excellent choice for connecting power and control signals within industrial control panels and enclosures, providing a reliable interface for various components.

Problem Solved

Offers a secure and organized method for terminating wires, ensuring reliable electrical connections in compact spaces where high current (24A) and voltage (800V) are present. Its robust screw connection method effectively resists vibrations common in industrial environments.

Industrial controlpanel wiring800V24Ascrew connectionDIN rail mountingvibration resistance

2. Building Automation Systems

Ideal for wiring various sensors, actuators, and power distribution networks within building automation systems, including HVAC, lighting, and security infrastructure.

Problem Solved

Provides a robust and safe connection point for permanent installations, capable of handling common building electrical loads and offering insulation against high surge voltages (8kV) for system longevity. Its wide operating temperature range (-60°C to 110°C) allows for dependable performance in varied environmental conditions within buildings.

Building automationHVACsensor wiringpower distribution800V8kV surge protectionwide temperature range

3. Machine Tool Electrical Systems

Applicable in machine tool environments for securely connecting power circuits to motors, solenoids, and other critical operational components.

Problem Solved

The terminal block's robust design, high flammability rating (V0), and reliable screw connection ensure superior safety and high reliability in environments prone to mechanical vibration and potential electrical stresses. The capability to handle 24A at 800V meets the power requirements for many machine applications.

Machine toolsmotor controlindustrial machineryvibration resistanceV0 flammability24A800V