Name: Phoenix Contact ST 2,5-TWIN Feed-Through Terminal Block - INOSAKI
SKU: Phoenix-3031241
Price: 1.99 USD
Availability: InStock

Technical Overview

Three-conductor spring-cage terminal block for DIN rail mounting. Rated 800V, 24A, 0.08-4mm² wire. Operates -60°C to 85°C.

Key Features

Three conductors share one 5.2 mm wide terminal block, reducing panel footprint.
Spring-loaded contacts maintain reliable connection even under mechanical vibration.
Compatible with CLIPLINE complete bridging, marking, and testing accessories.
No cross-section restriction when terminating conductors fitted with ferrules.
Suitable for hazardous area wiring under ATEX/IECEx classification.
Compliant with IEC 60947-7-1 and DIN EN 45545-2 (HL 1 - HL 3) fire protection standards.
Operating temperature range from -60 °C to 85 °C.
Space-saving design for efficient use of control cabinet space.

Technical Specification Matrix

Parameter	Value
Nominal Voltage	800 V (IEC)
Nominal Current	24 A (IEC, with 2.5mm² conductor)
Maximum Load Current	28 A (with 4 mm² conductor)
Number of Positions	3
Number of Connections	3
Connection Method	Spring-cage connection
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
Wire Size AWG Min	28 AWG
Wire Size AWG Max	12 AWG
Stripping Length	8 mm - 10 mm
Mounting Type	DIN rail (NS 35/7,5, NS 35/15)
Color	gray (RAL 7042)
Insulating Material	Polyamide (PA)
Flammability Rating	UL 94 V-0
Operating Temperature	-60 °C to 85 °C
Rated Impulse Voltage (Uimp)	8 kV
Overvoltage Category	III
Certifications	ATEX/IECEx II 2 GD Ex eb IIC Gb, DNV, NK, CCC, EAC Ex, UKCA-EX, KR
Physical Weight (kg)	0.01
Dimensions L x W x H (cm)	4.4 x 0.52 x 6.05

Industrial Applications

1. Industrial Control Panels in Harsh Environments

This terminal block is ideal for high-density wiring in industrial control panels located in environments with significant vibration, dust, and wide temperature fluctuations. The spring-cage connection ensures a reliable, maintenance-free contact even under mechanical stress, while its -60°C to 85°C operating temperature range allows deployment in unconditioned spaces or outdoor cabinets.

Problem Solved

Prevents unreliable connections and system downtime caused by vibration or extreme temperatures in industrial settings. Its compact 5.2mm width allows for more connections in limited panel space, optimizing cabinet design.

vibration resistancewide operating temperaturehigh density wiringspring-cageDIN rail800V24A5.2mm width

2. Hazardous Area (Ex-Zone) Installations

With ATEX/IECEx II 2 GD Ex eb IIC Gb certification, this terminal block is perfectly suited for signal and power distribution within potentially explosive atmospheres, such as chemical plants, oil & gas facilities, or mining operations. The 'Ex eb' protection type provides increased safety against ignition sources.

Problem Solved

Provides a certified and safe electrical connection solution for hazardous locations, meeting stringent safety regulations and preventing the creation of ignition sources in explosive atmospheres.

ATEXIECExhazardous areaEx ebexplosive atmospherechemical plantsoil & gasintrinsic safety800V

3. Railway Rolling Stock and Infrastructure

Its compliance with DIN EN 45545-2 (HL 1 - HL 3) fire protection standards makes this terminal block an excellent choice for railway applications, including control cabinets in locomotives, passenger coaches, or trackside equipment. The robust spring-cage connection is resistant to the constant vibrations and shocks experienced in railway operations, ensuring sustained performance.

Problem Solved

Ensures fire safety compliance and maintains reliable electrical connections in the demanding, high-vibration, and shock-prone environment of railway systems, thereby reducing the risk of failures and enhancing operational safety.

railway applicationsDIN EN 45545-2fire protectionvibration resistanceshock resistancespring-cagecontrol cabinets800V