Name: Phoenix Contact STTB 4 Double-level Spring-Cage Terminal Block - INOSAKI
SKU: Phoenix-3031429
Price: 7.46 USD
Availability: InStock

Technical Overview

Double-level spring-cage terminal block with 500V nominal voltage, 30A nominal current, and -60°C to 110°C operating temperature. Features 0.08-6mm² wire range.

Key Features

Compact design for maximum space savings.
Tested for railway applications (DIN EN 50155, DIN EN 45545-2).
Spring-cage connection for simple and secure conductor installation.
Double-level construction allows for the connection of more than one conductor per block.
Connect levels using FBS...-PV bridges for potential distribution.
Mounts onto NS 35/7.5 and NS 35/15 DIN rails.
Wide operating temperature range from -60 °C to 110 °C.

Technical Specification Matrix

Parameter	Value
Number of Levels	2
Number of Connections	4
Nominal Cross Section	4 mm²
Color	Gray (RAL 7042)
Insulating Material	PA (Polyamide)
Rated Surge Voltage	6 kV
Nominal Voltage	500 V
Nominal Current	30 A (with 4 mm² conductor cross section)
Maximum Load Current	32 A (with 6 mm² conductor cross section)
Conductor Cross Section Solid (Min)	0.08 mm²
Conductor Cross Section Solid (Max)	6 mm²
Conductor Cross Section Flexible (Min)	0.08 mm²
Conductor Cross Section Flexible (Max)	4 mm²
Conductor Cross Section AWG (Min)	28
Conductor Cross Section AWG (Max)	10
Mounting Type	DIN rail NS 35/7,5, NS 35/15
Operating Temperature Range	-60 °C to 110 °C
Flammability Rating (UL 94)	V0
Physical Weight (kg)	0.02
Dimensions L x W x H (cm)	5.5 x 0.62 x 8.35

Industrial Applications

1. High-Density Wiring for Industrial Control Cabinets

The STTB 4 terminal block provides a space-saving solution for wiring industrial control panels, especially in applications with limited cabinet space. Its double-level design allows for a high connection density, while the robust spring-cage technology ensures reliable connections in environments prone to vibration.

Problem Solved

Solves the challenge of fitting numerous connections into compact control cabinets while ensuring reliable and vibration-resistant wiring, crucial for continuous operation in factory automation and process control.

DIN rail mountcompact designdouble-levelspring-cage connectionvibration resistanceindustrial automationcontrol cabinet

2. Robust Wiring for Railway Rolling Stock and Infrastructure

This terminal block is tested for railway applications (DIN EN 50155, DIN EN 45545-2), making it ideal for connecting sensors, actuators, and control circuits in trains, signaling equipment, and trackside infrastructure. Its wide operating temperature range (-60°C to 110°C) and high surge voltage rating (6 kV) ensure reliability in demanding railway environments.

Problem Solved

Provides a certified and robust electrical connection solution that withstands the extreme temperatures, vibrations, and voltage surges typical of railway operations, preventing system failures and ensuring passenger safety.

Railway applicationsEN 50155EN 45545-2wide operating temperaturehigh surge voltagevibrationsignaling systems

3. Secure Sensor and Actuator Connections in High-Temperature Process Plants

For connecting instrumentation in process industries where ambient temperatures can fluctuate significantly, the STTB 4 offers reliable connections with an operating temperature range up to 110°C. The spring-cage technology maintains secure contact even with thermal expansion and contraction, making it suitable for wiring sensors and actuators near heat sources.

Problem Solved

Addresses the need for stable and secure electrical connections for critical sensors and actuators operating in industrial process environments with elevated or fluctuating temperatures, minimizing downtime due to connection failures.

Process industryhigh-temperature operationthermal stabilityspring-cagesensor wiringactuator controlinstrumentation