Phoenix Contact3031429 STTB 4 Series Double Level Terminal Block, 0.08 → 6mm², 2-Level

From Phoenix Contact, the STTB double-level, spring-cage terminal blocks are great DIN rail mounted terminal blocks that boast a compact design, dual-layers and mount onto popular DIN rails. These DIN rail terminals are spring-cage connection technology and that allows for an effortless install thanks to you only having to strip wire and push-in your conductor. The terminal block access an AWG of 28-16 and they can be mounted onto NS 35/7.5 or NS 35/15 DIN rails for maximum flexibility and applications.

These terminal blocks come in a grey colour and housings are made from a polyamide material. Contacts on this device are plated copper. The STTB range is also backed by an ATEX EX rating that means it has a certification to be installed in potentially explosive areas.

Potentials on two levels to halve space requirement compared with single-level clamps

The STTB range can be used in the below, but are not subjected to:

• Railway industry (Tried and tested)


• Plant engineering


• Machine building


• Process industries

Terminal blocks are simple to wire. Wiring depends on what type of terminal block you have. These specific terminal blocks are spring-cage terminal blocks. To wire spring cage terminal blocks you can either use a strong non-flexible cable or use a cable with a ferrule on. Simply strip your cable and clamp a ferrule if you're using one, insert a screwdriver into the actuation shaft to open the terminal point, push your conductor in and remove your screwdriver. Ensure your conductor is pushed in as far as it can go.

The STTB series is apart of Phoenix Contacts vast and comprehensive portfolio. Complete line is a solution from Phoenix Contact that gives you a full range of products that all go hand-in-hand to make a perfect control cabinet. It covers all bases from connections, switching and measuring all the way to controlling, supplying and automation. Choosing complete line products makes it far more efficient to get a cabinet working.

UL; CUL; CSA

This STTB 4 is a versatile double-level spring-cage terminal block designed for efficient connection in demanding industrial environments. With a compact design and robust construction, this terminal block is suitable for machine building, railway, and plant engineering applications. It supports a broad range of conductor sizes and features a spring-cage connection method for rapid and reliable installation. With a rated current of 32A and a nominal voltage of 500V, it ensures safe and efficient operation in high-stakes conditions.

• Accepts wire sizes from 0.08mm² to 6mm² for enhanced versatility
• Rated at 32A current for robust performance
• 500V voltage rating for high-demand applications
• Spring-cage connection method simplifies cable management
• Complies with IEC 60947-7-1 standards for safety and reliability
• Suitable for railway and industrial automation settings

• Used in railway applications for secure connections
• Employed in machine building for reliable connectivity
• Ideal for plant engineering in harsh environments
• Suitable for process industry applications requiring dual-level connections

Yes, it's rated for operation between -60°C and +110°C.

UL, CUL, CSA