Name: Phoenix Contact ST 2,5 BU Feed-Through Terminal Block - INOSAKI
SKU: Phoenix-3031225
Price: 6.22 USD
Availability: InStock

Technical Overview

800V, 24A feed-through terminal block for 0.08-4mm² conductors. Features spring-cage connection, -60°C to 85°C operating temp, and UL 94 V0 polyamide housing.

Key Features

Spring-cage connection for secure and dependable contact.
Accommodates a wide range of conductor cross sections: 0.08 mm² to 4 mm² (rigid) and 0.08 mm² to 2.5 mm² (flexible).
Compact design with front connection for user-friendly wiring in small spaces.
Consistent double function shaft allows for time-saving potential distribution and easy accommodation of test accessories.
Tested and suitable for railway applications, machine building, plant engineering, and process industry environments.
Insulating material is PA (Polyamide) with a flammability rating of UL 94 V0.
Wide operating temperature range from -60°C to +85°C.
Rated surge voltage of 8 kV, providing robust electrical protection.
Designed for mounting on NS 35/7,5 or NS 35/15 DIN rails.

Technical Specification Matrix

Parameter	Value
Nominal Voltage	800 V
Nominal Current	24 A (at 2.5 mm² conductor cross section)
Rated Cross Section	2.5 mm²
Conductor Cross Section (rigid)	0.08 mm² - 4 mm²
Conductor Cross Section (flexible)	0.08 mm² - 2.5 mm²
Conductor Cross Section AWG	28 - 12
Connection Method	Spring-cage connection
Rated Surge Voltage	8 kV
Overvoltage Category	III
Degree of Pollution	3
Flammability Rating (UL 94)	V0
Insulating Material	PA (Polyamide)
Minimum Operating Temperature	-60 °C
Maximum Operating Temperature	+85 °C
Mounting Type	DIN rail NS 35/7,5, NS 35/15
Number of Connections	2
Color	Blue (RAL 5015)
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	4.85 x 0.52 x 4.4

Industrial Applications

1. High-Density Control Cabinet Wiring in Railway Systems

This terminal block is ideal for high-density wiring in railway control cabinets, where space is often limited. Its compact dimensions (5.2 mm width, 48.5 mm length, 44 mm height) and front spring-cage connection allow for user-friendly installation and maintenance in tight enclosures. The robust design and vibration-resistant spring-cage technology ensure reliable connections under the demanding conditions of railway applications.

Problem Solved

Provides a space-saving and highly reliable electrical connection solution for critical control circuits in railway infrastructure, minimizing installation time and maximizing cabinet efficiency.

Railway ApplicationsCompact DesignSpring-cage connectionHigh Vibration ResistanceDIN Rail Mounting

2. Industrial Control Panels with Wide Temperature Fluctuations

The ST 2,5 BU is well-suited for industrial control panels operating in environments with significant temperature variations, such as unheated warehouses or outdoor enclosures. With an operating temperature range of -60°C to +85°C, it maintains electrical integrity and mechanical stability across extreme cold and moderate heat, preventing failures due to thermal stress.

Problem Solved

Ensures reliable and stable electrical connections in industrial settings exposed to broad temperature fluctuations, mitigating component degradation and system downtime.

Wide Temperature RangeIndustrial ControlEnvironmental ResiliencePA Insulating Material

3. Power Distribution in Machine Building with High Electrical Demands

In machine building applications, where various sensors, actuators, and control devices require robust power connections, this terminal block provides a safe solution. Its 800V nominal voltage and 24A nominal current rating, combined with an 8 kV rated surge voltage and UL 94 V0 flammability rating, ensure high electrical safety and protection against transient overvoltages and potential fire hazards. The ability to connect 0.08 mm² to 4 mm² conductors offers flexibility for different power and signal requirements.

Problem Solved

Offers a safe and versatile solution for power and signal distribution within machinery, handling high voltage and current demands while providing protection against electrical surges and fire.

Machine BuildingHigh VoltageHigh CurrentSurge ProtectionUL 94 V0