Auxiliary contact ST-1NO-1NC

Universal auxiliary contact – expand installation capabilities

This auxiliary contact, designated ST-1NO-1NC, is a reliable solution for expanding existing electrical circuits. Its compact dimensions and easy mounting on a standard 35 mm rail make it ideal for both professional installers and end-users who need additional control points. The contact allows you to add one normally open (NO) and one normally closed (NC) contact to an existing system.

Functionality and technical parameters

The contact design is based on solid screw terminals, accepting wires with a cross-section of 1.5 - 2.5 mm², ensuring a safe and durable connection. A tightening torque of 0.8 Nm guarantees connection stability even under vibration conditions. The contact is designed to operate in a wide temperature range, from -5°C to 50°C, making it a universal solution for various environments. It provides insulation at a level of 500 V AC, and the impulse voltage withstands 4 kV – these are key parameters for the safety and reliability of the installation.

Application and compliance with standards

The ST-1NO-1NC auxiliary contact finds application in many areas, from home automation to industrial control systems. It complies with the PN-EN 60947-5-1 standard, confirming its safety and quality. The contact load capacity has been selected to ensure reliable operation in various applications:

• AC-12 (240 V AC): 5 A
• AC-15 (230 V AC): 2 A
• DC-1 (130 V DC): 1 A

The IP20 protection class means that the contact is protected against accidental contact, but not against the effects of water or dust – remember to provide appropriate housing in case of installation in difficult conditions. The device width is only 9 mm, allowing for efficient use of space in the switchgear cabinet.