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Phone：+86 15383419322Description
The PHOENIX CONTACT ST 6-TWIN (Order No. 3036466) is a high-performance, double-level feed-through terminal block engineered by Phoenix Contact to maximize wiring density and efficiency in modern industrial control panels. As a core component of the CLIPLINE complete system, the ST 6-TWIN utilizes advanced push-in spring connection technology, allowing for rapid, tool-free wiring of rigid conductors and ferruled flexible wires. This innovative design significantly reduces installation time while ensuring gas-tight, vibration-resistant connections that guarantee long-term operational safety.Designed to handle demanding electrical loads, the PHOENIX CONTACT ST 6-TWIN supports a nominal cross-section of 6 mm² and carries a maximum current rating of 41 A. Its compact double-deck architecture effectively halves the required DIN rail space compared to standard single-level terminals, making it an ideal solution for complex automation projects where panel real estate is at a premium. The module features a functional drive shaft that streamlines potential distribution and accommodates various test accessories, enhancing its versatility in intricate circuit layouts.Beyond its space-saving benefits, the ST 6-TWIN is built for resilience in harsh environments. It has been rigorously tested for rail transit applications, demonstrating exceptional resistance to shock and wide-band vibration according to DIN EN 50155 standards. With an ultra-wide operating temperature range from -60°C to 110°C and compliance with IEC 60947-7-1, the PHOENIX CONTACT ST 6-TWIN delivers unwavering reliability across diverse industries, from heavy manufacturing and energy infrastructure to transportation systems.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | ST 6-TWIN (Order No. 3036466) |
| Manufacturer | PHOENIX CONTACT |
| Product Type | Double-Level Feed-Through Terminal Block |
| Connection Method | Push-in Spring Connection (ST) |
| Nominal Cross Section | 6 mm² |
| Maximum Current Rating | 41 A |
| Mounting Type | DIN Rail NS 35/7.5 or NS 35/15 |
| Insulation Material | Polyamide (PA), UL 94 V0 Flammability Rating |
| Operating Temperature | -60°C to 110°C |
| Compliance Standard | IEC 60947-7-1 |
| Color | Blue (Standard) |
| Width | 8.2 mm |
Main Features and Advantages
Space-saving double-level design: The PHOENIX CONTACT ST 6-TWIN features a highly compact double-deck structure that allows two conductors to be connected within the footprint of a single standard terminal. This design drastically reduces the overall width of the terminal strip, enabling engineers to pack more connection points into limited control cabinet space. For large-scale automation projects, this space optimization translates directly into smaller enclosure sizes and reduced material costs.Rapid push-in spring connection: Leveraging Phoenix Contact’s proven ST technology, the ST 6-TWIN enables direct, tool-free insertion of rigid wires and flexible wires with ferrules. This plug-and-play capability accelerates the wiring process significantly, minimizing labor hours during assembly. The powerful spring mechanism ensures a constant contact force, providing superior resistance to shock and vibration, which is critical for maintaining signal integrity in dynamic industrial environments.Robust performance for rail transit: Specifically tested for transportation applications, the PHOENIX CONTACT ST 6-TWIN meets stringent DIN EN 50155 requirements for shock (5g) and wide-band random vibration on bogies. This makes it a dependable choice for rolling stock and railway signaling systems where equipment must endure continuous mechanical stress without failure. Its ability to operate flawlessly in temperatures as low as -60°C further solidifies its status as a heavy-duty industrial component.Versatile potential distribution and testing: Equipped with a functional drive shaft, the ST 6-TWIN simplifies the installation of plug-in bridge systems (such as the FBS series) for efficient voltage distribution across adjacent terminals. Additionally, the integrated test connection allows maintenance personnel to easily接入 measurement devices using standard test plugs (like PS-8), facilitating safe and convenient circuit diagnostics without disconnecting wires.High current capacity and safety: Despite its compact size, the PHOENIX CONTACT ST 6-TWIN handles a robust 41 A current load, making it suitable for power distribution tasks. The housing is manufactured from high-quality polyamide with a UL 94 V0 flammability rating, ensuring excellent fire resistance and electrical insulation properties. This combination of high power handling and safety compliance provides peace of mind for critical electrical installations.
Application Field
Industrial Automation and Control Cabinets: In dense PLC racks and motor control centers, panel space is a valuable commodity. The PHOENIX CONTACT ST 6-TWIN is widely used here to terminate sensor cables, actuator wires, and power distribution lines. Its double-level design allows integrators to maintain clean, organized wiring layouts even when dealing with hundreds of I/O points, significantly improving the aesthetics and serviceability of the control cabinet.Rail Transit and Transportation Systems: Due to its certification for shock and vibration resistance, the PHOENIX CONTACT ST 6-TWIN is a preferred component in trains, subways, and trams. It is deployed in traction control systems, lighting circuits, and door control units, where it reliably maintains electrical connections despite the harsh mechanical environment of a moving vehicle. Its wide temperature tolerance also makes it suitable for outdoor signaling infrastructure exposed to extreme weather.Energy and Power Distribution: In wind turbines, solar inverters, and substations, reliable wiring is non-negotiable. The ST 6-TWIN handles the 41 A current loads often found in auxiliary power circuits and control loops. Its robust push-in connection prevents loosening over time due to thermal cycling or micro-vibrations, ensuring continuous uptime in remote or hard-to-access energy generation sites.Process Instrumentation: For chemical and pharmaceutical plants requiring precise monitoring, the PHOENIX CONTACT ST 6-TWIN provides secure termination for instrument signals. The integrated test shaft allows technicians to quickly verify loop currents and voltages during calibration or troubleshooting, minimizing process downtime and ensuring strict adherence to quality control standards.
Related Products
- PHOENIX CONTACT 3036482 (ST 6-TWIN-PE): The grounding (PE) version of the ST 6-TWIN, featuring a yellow-green color scheme and dedicated grounding contacts for safety earthing applications.
- PHOENIX CONTACT 3038163 (STS 6-TWIN BU): A blue variant of the double-level terminal with an angled wire entry, designed for specific underfloor or space-constrained wiring scenarios.
- PHOENIX CONTACT 3036767 (D-ST 6-TWIN): An end cover specifically designed for the ST 6-TWIN series, providing necessary insulation and mechanical protection at the end of a terminal group.
- PHOENIX CONTACT 3030310 (FBS 5-8): A 5-position plug-in bridge compatible with the ST 6-TWIN, used to rapidly distribute potential (voltage) across multiple terminals without external wiring.
- PHOENIX CONTACT 3048564 (PS-8): A standard test plug that fits into the functional drive shaft of the ST 6-TWIN, enabling safe electrical testing and measurement during commissioning.
- PHOENIX CONTACT 3211929 (PT 6-TWIN): A similar double-level terminal from the PT (Push-in) series, offering comparable specifications but with slight differences in internal mechanics and actuation.
Installation and Maintenance
Pre-installation preparation: Before installing the PHOENIX CONTACT ST 6-TWIN, ensure that the DIN rail (NS 35/7.5 or NS 35/15) is securely mounted and properly grounded. Verify that the wire stripping length matches the required 8-10 mm specification to ensure optimal contact engagement. Although the push-in technology supports tool-free insertion for rigid wires, have a standard screwdriver on hand if you need to release connections or work with unrated flexible cables. Always de-energize the control panel before beginning any physical installation or modification of the ST 6-TWIN modules to prevent electrical hazards.Maintenance recommendations: One of the key advantages of the PHOENIX CONTACT ST 6-TWIN is its maintenance-free design; the high-force spring connection does not require periodic retightening like traditional screw terminals. However, during routine system inspections, visually check the terminal blocks for any signs of physical damage, overheating, or discoloration. If circuit testing is required, utilize the integrated test shaft with compatible test plugs rather than probing the wire entry points directly, which preserves the integrity of the spring mechanism and ensures the longevity of the ST 6-TWIN.
