Contact blocks Series S-ES and S-EE - WESTEC

Contact blocks Series S-ES and S-EE - WESTEC

Contact blocks, also known as auxiliary contact blocks or switching blocks, are essential components for industrial control systems. The Series S-ES and S-EE from WESTEC are designed for use with contactors, relays, and motor starters, providing additional normally open (NO) and normally closed (NC) contacts. These blocks typically feature ratings from 6A to 16A at 400V AC, with mechanical durability exceeding 10 million operations. They are available in various configurations, including 1NO+1NC, 2NO+2NC, and 3NO+1NC, and are compatible with standard DIN rail mounting or direct attachment to contactors. The S-ES series offers screw-type terminals, while the S-EE series features spring-cage connections for faster wiring. Both series are rated for insulation class I and comply with IEC/EN 60947-5-1 standards.

These contact blocks are widely used in industrial automation, motor control centers (MCCs), and power distribution panels. They are ideal for applications requiring signal feedback, interlocking, or status indication in conveyor systems, HVAC controls, pump stations, and packaging machinery. The blocks are also employed in safety circuits and emergency stop systems, where reliable contact performance is critical. Their compact design makes them suitable for high-density control cabinets in manufacturing plants, water treatment facilities, and building management systems.

The main subcategories include the S-ES series (screw terminal) and S-EE series (spring-cage terminal). Key article codes are structured as follows: for S-ES, codes like S-ES-11 (1NO+1NC), S-ES-22 (2NO+2NC), and S-ES-31 (3NO+1NC); for S-EE, codes like S-EE-11, S-EE-22, and S-EE-31. Additional variants include S-ES-20 (2NO) and S-EE-02 (2NC). These codes follow the pattern: series (S-ES or S-EE) followed by a hyphen and a two-digit number indicating the contact configuration (first digit = NO contacts, second digit = NC contacts). All blocks are available with standard or gold-plated contacts for low-level switching.

At Electric Automation Network, we offer these contact blocks with competitive pricing, real-time stock availability, and express worldwide shipping. Our engineering team provides personalized technical support to help you select the right configuration for your application. We also supply complete documentation, including datasheets and CAD drawings, ensuring seamless integration into your projects. Benefit from up to 65% discount compared to market prices, with no minimum order quantities.