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SNK Series - Clamp - Disconnect terminal blocks
Clamp disconnect terminal blocks, often referred to as knife-disconnect terminal blocks or simply disconnect terminals, are fundamental components in industrial control panels and power distribution systems. These blocks integrate a switching mechanism—typically a sliding knife or lever—that allows the circuit to be opened or closed without remo...
Clamp disconnect terminal blocks, often referred to as knife-disconnect terminal blocks or simply disconnect terminals, are fundamental components in industrial control panels and power distribution systems. These blocks integrate a switching mechanism—typically a sliding knife or lever—that allows the circuit to be opened or closed without removing the wiring. The SNK series encompasses a wide range of these blocks, designed for rail mounting (DIN rail) and featuring robust clamping technology for secure conductor connections. Key technical parameters include rated current (amperage), rated voltage (up to 1000V AC/DC in many variants), conductor cross-section ranges (from 0.5 mm² to 35 mm² or more), and the number of poles (typically 1P, 2P, or 3P). The disconnect function is often rated for breaking capacity under load, making them suitable for isolating circuits during maintenance or troubleshooting. Materials include high-grade polyamide (PA) for insulation and nickel-plated copper or steel for conductive parts, ensuring durability and low contact resistance.
These terminal blocks are predominantly used in industrial automation, machinery control cabinets, power distribution panels, and building management systems. They are ideal for applications requiring periodic circuit isolation, such as motor control centers (MCCs), PLC input/output (I/O) wiring, sensor and actuator connections, and power supply distribution. The disconnect feature simplifies testing, commissioning, and safety lockout/tagout (LOTO) procedures. They are also common in renewable energy systems, like solar inverter cabinets, and in railway signaling or transportation infrastructure where reliable isolation is critical.
The SNK series includes several subcategories and key article codes. Notable examples include the SNK-2.5 (rated for 2.5 mm² conductors, 24A, 800V), SNK-4 (4 mm², 32A, 800V), and SNK-6 (6 mm², 41A, 800V). The code structure typically follows the pattern "SNK-" followed by the cross-section or current rating, and may include suffixes for color (e.g., -BL for blue, -RD for red) or special features (e.g., -D for disconnect, -PE for protective earth). Other variants include SNK-10 (10 mm², 57A, 800V) and SNK-16 (16 mm², 76A, 800V). Accessories like end brackets, partition plates, and marking tags are also available to complete the assembly.
At Electric Automation Network, we offer the complete SNK series with real-time pricing, up to 65% discount off list prices, and express worldwide shipping. Our team of specialized electrical engineers provides personalized technical support to help you select the correct disconnect terminal block for your application, including guidance on current ratings, voltage levels, and mounting configurations. We also supply detailed technical documentation for each article, ensuring you have all the data needed for panel design and compliance.
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