The CM4SO Panel Mount Spring Clamp Terminal Block is a compact and reliable 4 sq.mm feed-through terminal block designed for industrial electrical wiring, control panels, automation systems, switchgear assemblies, instrumentation panels, and OEM electrical equipment. It is part of Connectwell’s CM series and is specifically engineered for applications requiring safe, vibration-resistant, and space-saving panel mount wiring solutions. Its orange colour housing makes it suitable for circuit identification, color-coded installations, and organized panel wiring systems.
The CM4SO uses spring clamp connection technology, which ensures secure conductor termination without the need for periodic screw tightening. The spring clamp mechanism provides constant contact pressure, reducing the risk of loose wiring due to vibration, thermal expansion, or mechanical movement. This makes the terminal block highly suitable for industrial environments where reliability and long-term electrical performance are critical. Spring clamp connections also reduce installation time and improve wiring efficiency for electricians and panel builders.
Designed with a 4 sq.mm conductor capacity, the CM4SO supports a wide range of solid and stranded wires, making it versatile for industrial power and control circuit applications. It features a side wire entry orientation, allowing easy cable routing and compact wiring inside electrical panels. The terminal block is also stackable, enabling multiple units to be assembled together to create multi-pole terminal configurations while saving panel space.
The CM4SO is manufactured with high-grade polyamide insulated housing, providing excellent electrical insulation, flame resistance, mechanical strength, and long service life. It offers a rated voltage of 630V and a rated current of 32A, making it suitable for industrial electrical installations requiring dependable electrical continuity and safety. The product also has a rated surge voltage of 6 kV, enhancing protection against transient voltage conditions in industrial systems.
This terminal block is suitable for free floating, surface, and panel mounting, giving flexibility for different installation requirements. It is commonly used in PLC control panels, machine wiring, automation cabinets, instrumentation systems, switchgear, and industrial electrical distribution systems. Its compact design, reliable spring clamp connection, and easy installation make it an ideal choice for professionals seeking efficient panel mount wiring solutions.
With its compact construction, industrial-grade performance, 4 sq.mm conductor capacity, 32A current rating, and spring clamp technology, the CM4SO Panel Mount Terminal Block delivers a safe and efficient wiring solution for modern industrial electrical applications. It is widely preferred in compact electrical panel designs where secure, maintenance-free wiring and circuit identification are important.
| Specification | Details |
|---|---|
| Product Name | CM4SO |
| Type | Panel Mount Spring Clamp Terminal Block |
| Product Function | Feed Through |
| Conductor Capacity | 0.2 to 4 sq.mm |
| Connection Type | Spring Clamp |
| Rated Voltage | 630V |
| Rated Current | 32A |
| Rated Surge Voltage | 6 kV |
| Housing Material | Polyamide |
| Wire Entry | Side Entry |
| Mounting Type | Free Floating / Surface / Panel |
| Number of Levels | 1 |
| Number of Connections | 2 |
| Operating Temperature | -40°C to +105°C |
| Colour | Orange |
| Width | 12 mm |
| Length | 33.7 mm |
| Height | 23 mm |
The CM4SO is widely used in:
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