Phoenix Contact3031539 STTB 2.5-PV Series Double Level Terminal Block, Double-Level, Spring Clamp Termination

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 double-level terminal block provides dependable electrical connections across various applications. Featuring a spring cage termination method, it is designed to support a range of conductor sizes. Its compact configuration allows for optimal space utilisation.

• ATEX certified for use in hazardous areas
• Rated current of 22A for robust performance
• Nominal voltage rating of 500V for safe operation
• Enhanced connectivity with multi-level configurations

• Used in railway applications for effective circuit management
• Suitable for machine building where space conservation is important
• Employed in plant engineering for high-performance installations
• Appropriate for process industries requiring durable components

Each level supports two connections, ideal for efficient circuit management.

It accommodates rigid conductors from 0.08mm² to 4mm² and flexible conductors up to 2.5mm².

Yes, it can operate in temperatures ranging from -60 to 110°C, making it suitable for various environments.