Phoenix Contact 3031380 ST 4 Ground Terminal Block, Yellow-Green

The Phoenix Contact 3031380 ST 4 is a professional-grade ground terminal block designed to provide a secure and reliable electrical connection to the DIN rail. Engineered for industrial control cabinets, this terminal block utilizes advanced spring-cage connection technology, which maintains consistent contact pressure even under conditions of high vibration. Its distinct yellow-green color coding ensures easy identification for grounding circuits within complex electrical systems.

Advantages

This terminal block offers significant benefits for electrical installations, primarily through its spring-cage connection system that eliminates the need for manual screw tightening and reduces maintenance requirements over time. The design provides excellent vibration resistance, ensuring that connections remain stable in demanding industrial environments. Its compact width allows for high-density wiring, while the robust construction ensures long-term operational reliability and safety in grounding applications.

Suitable for

• Industrial control cabinet wiring
• Grounding applications in automation systems
• Electrical distribution panels
• Vibration-prone machinery and equipment

When it may not be suitable

This terminal block is specifically designed for grounding purposes and should not be used for phase or neutral power distribution. It is intended for mounting on standard DIN rails and may not be compatible with non-standard mounting surfaces or specialized enclosure types without appropriate adapters.

Key specifications

• Connection method: Spring-cage connection
• Number of connections: 2
• Cross section capacity: 0.08 mm² to 6 mm²
• Wire gauge range: 28 to 10 AWG
• Width: 6.2 mm
• Color: Green-yellow
• Mounting compatibility: NS 35/7,5 and NS 35/15 DIN rails

How to use

To install the terminal block, snap it onto the compatible NS 35/7,5 or NS 35/15 DIN rail until it clicks securely into place. Strip the insulation from your conductor according to the required length and insert the wire into the spring-cage opening using a suitable screwdriver to actuate the spring mechanism. Ensure the wire is fully seated to guarantee a secure electrical connection to the rail.

What to consider before purchase

• Verify that your DIN rail type matches the NS 35/7,5 or NS 35/15 standards.
• Ensure the wire cross-section falls within the 0.08 mm² to 6 mm² range.
• Confirm that the 6.2 mm width fits within your existing terminal block assembly.

Usage recommendations

Always ensure that the DIN rail is properly grounded to the main protective earth system to maintain the integrity of the grounding circuit. Periodically inspect connections in high-vibration environments to ensure optimal performance.