Name: Phoenix Contact STTB 1,5 Double-Level Terminal Block - INOSAKI
SKU: Phoenix-3031157
Price: 2.24 USD
Availability: InStock

Technical Overview

Double-level spring-cage terminal block rated 500V, 17.5A. Features a compact 4.2mm width for high-density wiring and supports 0.08mm² to 1.5mm² conductors.

Key Features

Double-level spring-cage terminal block
Spring-cage connection method for reliable wiring
Tested and suitable for railway applications
Compact design for maximum space savings
Levels can be connected using FBS ...-PV bridges
Suitable for use in Ex (explosive) zones
Gray color (RAL 7042)
Flammability rating according to UL 94: V0

Technical Specification Matrix

Parameter	Value
Product Type	Multi-level terminal block
Product Family	ST
Number of Connections	4
Number of Rows	2
Potentials	2
Overvoltage Category	III
Degree of Pollution	3
Insulating Material Group	I
Rated Surge Voltage	6 kV
Maximum Power Dissipation for Nominal Condition	0.56 W
Connection Method	Spring-cage connection, 1st and 2nd level
Nominal Cross Section	1.5 mm²
Conductor Cross Section Rigid	0.08 mm² - 1.5 mm²
Conductor Cross Section AWG	28 - 16 (converted according to IEC)
Stripping Length	10 mm
Mounting Type	NS 35/7,5, NS 35/15 (DIN rail)
Color	gray (RAL 7042)
Flammability Rating according to UL 94	V0
Insulating Material	PA
Operating Temperature Range	-60 °C ... 110 °C (incl. self-heating)
Nominal Voltage (IEC)	500 V
Nominal Current (IEC)	17.5 A (with 1.5 mm² conductor)
Ex Zone Compatibility	Yes (Explosionsgeprüfte Ausführung 'Ex e')
Physical Weight (kg)	0
Dimensions L x W x H (cm)	4.75 x 0.42 x 6.75

Industrial Applications

1. High-Density Control Cabinet Wiring

This terminal block is ideal for high-density wiring applications in industrial control cabinets where space is at a premium. Its double-level design and narrow 4.2 mm width allow for a significant number of connections in a confined area, reducing cabinet size and material costs.

Problem Solved

Solves the problem of limited space in control cabinets by providing two connection levels within the footprint of a single-level terminal block, thus maximizing wiring density.

High-density wiringControl cabinetSpace optimizationIndustrial automationSpring-cage connection4.2mm width

2. Signal Wiring in Railway Traction and Rolling Stock

The STTB 1,5 is specifically tested for railway applications (DIN EN 50155), making it suitable for secure and reliable signal or auxiliary power distribution within railway traction units and rolling stock. Its robust spring-cage connection ensures vibration-resistant connections crucial for railway environments operating from -60 °C to 110 °C.

Problem Solved

Provides reliable and vibration-proof electrical connections for critical signaling and low-power applications in harsh railway environments, where mechanical stability and tested performance are paramount.

Railway applicationsVibration resistanceSignal distributionRolling stockDIN EN 50155Spring-cageWide operating temperature

3. Intrinsically Safe Circuits in Hazardous (Ex) Areas

With its suitability for Ex zones and a nominal voltage of 500 V, this terminal block can be used for wiring intrinsically safe circuits in hazardous industrial environments, such as chemical plants or oil and gas facilities. The double-level design can help separate intrinsically safe and non-intrinsically safe circuits within the same block assembly, minimizing the risk of ignition.

Problem Solved

Enables safe and compliant wiring for intrinsically safe circuits in potentially explosive atmospheres, utilizing its Ex-zone compatibility to prevent ignition sources and improve operational safety.

Intrinsically safeHazardous areasEx zoneChemical plantOil and gasElectrical safetyVoltage segregation