Siemens 5ST2502 4-Pole Distribution Board Block 125A 690V

The Siemens 5ST2502 is a high-performance 4-pole distribution board block engineered for reliable electrical power distribution in industrial and commercial environments. Designed to integrate seamlessly with residual current devices and miniature circuit breakers, this modular block provides a robust solution for managing complex wiring configurations within electrical panels. Its construction ensures efficient cable organization and secure connectivity, supporting a rated current of 125A and a voltage of 690V.

Advantages

This distribution block offers exceptional versatility through its universal mounting capabilities, allowing it to be easily installed on standard DIN rails. The unit is designed with user safety as a priority, featuring integrated touch protection that minimizes the risk of accidental contact during installation and maintenance. By consolidating multiple connection points into a single, compact component, it significantly simplifies panel wiring, reduces clutter, and improves the overall organization of electrical distribution systems. The high-quality materials used in its construction ensure long-term durability and consistent performance under demanding operational conditions.

Suitable for

• Industrial electrical control panels
• Commercial power distribution systems
• Integration with residual current devices
• Miniature circuit breaker assemblies
• Organized cable management in modular enclosures

When it may not be suitable

This distribution block is not intended for use in environments exceeding its rated voltage of 690V or current capacity of 125A. It is also not suitable for outdoor installations unless housed within an appropriately rated, weather-protected enclosure.

Key specifications

• Number of poles: 4
• Rated current: 125A
• Rated voltage: 690V
• Phase connections: 1x 6-35 mm², 2x 4-16 mm², 5x 1.5-6 mm² per phase
• Neutral connections: 1x 6-35 mm², 6x 4-16 mm², 4x 1.5-10 mm²
• Mounting type: DIN rail

How to use

To install the Siemens distribution block, securely snap the unit onto a standard DIN rail within your electrical panel. Ensure the power supply is disconnected before beginning any wiring work. Connect the incoming power cables to the designated primary terminals and distribute the outgoing circuits to the secondary terminals according to your system requirements. Tighten all terminal screws to the specified torque to ensure a secure and reliable electrical connection. Once all connections are verified, perform a final inspection to ensure that all cables are properly seated and that the touch protection covers are correctly positioned.

What to consider before purchase

• Verify that the total current load of your system does not exceed 125A.
• Ensure the available space in your electrical panel is sufficient for the block dimensions.
• Check that your cable cross-sections are compatible with the specified terminal ranges.
• Confirm that the DIN rail mounting configuration is compatible with your existing panel layout.

Usage recommendations

Always ensure that the installation is performed by a qualified electrician in accordance with local electrical codes and safety regulations to prevent equipment damage or personal injury.