CMDB25/4 is a high-performance 25 sq.mm Modular Distribution Terminal Block designed for safe and efficient electrical power distribution in industrial control panels, switchgear systems, electrical enclosures, automation panels, machine wiring systems, and power distribution applications. This terminal block is specially engineered to provide multiple outgoing connections from a single incoming power source while maintaining safe current flow, organized wiring, and reliable electrical continuity. It is a pre-assembled modular distribution block with 8 connection points, making it an ideal solution for compact and professional panel wiring applications.
CMDB25/4 belongs to the Connectwell CMDB25 Series, which is a modified version of the standard CDB distribution block design but without the central incoming terminal connection. This allows flexible power input from one connection point and power distribution to the remaining output terminals. It simplifies panel wiring by reducing jumper links, minimizing clutter, and improving electrical distribution efficiency. The total outgoing current can be distributed safely as long as it remains within the rated input capacity of the block.
The 8 output connection design makes CMDB25/4 highly suitable for industrial power distribution systems where multiple branch circuits need to be connected from one power source. This helps engineers and panel builders save wiring space, reduce installation time, and improve maintenance access inside electrical panels. The modular compact design provides a neat and organized wiring arrangement in distribution systems.
CMDB25/4 supports conductor sizes from 6 mm² to 25 mm² stranded wires and is designed for high-power electrical applications. With a rated current of 101A and rated voltage of 800V IEC, this distribution terminal block delivers excellent electrical performance for industrial and commercial applications. The terminal also carries UL/CSA voltage rating of 600V and current rating of 85A, making it suitable for international standard panel applications.
The terminal block uses screw clamp connection technology, ensuring strong mechanical clamping and low contact resistance for secure electrical continuity. The M5 screw system provides reliable tightening performance with a 2 Nm tightening torque, ensuring vibration-resistant and stable wire connections in demanding industrial environments. This makes CMDB25/4 suitable for heavy-duty electrical systems, motor control panels, and power distribution circuits.
Its Polyamide insulated housing provides excellent electrical insulation, mechanical strength, flame resistance, and long service life. The material has a Comparative Tracking Index (CTI) of 600, ensuring improved safety against electrical tracking in high-voltage environments. The block also provides a rated surge voltage of 8kV, which offers protection against transient overvoltage conditions in industrial power systems.
CMDB25/4 is designed for DIN 32 / DIN 35 / DIN 35-15 rail mounting, making installation simple and compatible with standard industrial electrical panels. The side wire entry orientation allows convenient conductor insertion and organized cable routing. The screwdriver-operated terminal design makes installation easy for panel builders and maintenance engineers.
The block comes in Grey colour as standard and is also available in multiple colors such as Red, Yellow, Blue, Black, and Green for easy phase identification in power distribution applications. This helps improve electrical safety and panel organization during installation and maintenance.
CMDB25/4 is widely used in:
Its rugged design, multiple connection capability, high current rating, compact DIN rail mounting design, and reliable screw clamp technology make CMDB25/4 a preferred solution for industrial electrical engineers, OEM manufacturers, panel builders, and automation integrators.
| Specification | Details |
|---|---|
| Model Number | CMDB25/4 |
| Product Type | Modular Distribution Terminal Block |
| Series | CMDB25 |
| Connection Type | Screw Clamp |
| Number of Connection Points | 8 |
| Input Connections | 1 |
| Rated Voltage (IEC) | 800 V |
| Rated Voltage (UL/CSA) | 600 V |
| Rated Current (IEC) | 101 A |
| Rated Current (UL/CSA) | 85 A |
| Conductor Size (Min) | 6 mm² |
| Conductor Size (Max) | 25 mm² |
| AWG Range | 12 – 4 AWG |
| Tightening Torque | 2 Nm |
| Screw Size | M5 |
| Wire Entry Orientation | Side Entry |
| Housing Material | Polyamide |
| Colour | Grey |
| Rated Surge Voltage | 8 kV |
| Overvoltage Category | III |
| Pollution Degree | 3 |
| Mounting Type | DIN 32 / DIN 35 / DIN 35-15 Rail |
| Length | 49 mm |
| Width | 50 mm |
| Operating Temperature | -40°C to +105°C |
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