Siemens 3RT2018-2KG42-0LA0 SIRIUS Contactor AC-3e/AC-3, 16A, 125V DC, Spring-Loaded Terminal Original Brand New

Overview

The Siemens 3RT2018-2KG42-0LA0 is a high-performance SIRIUS traction contactor designed for reliable switching of electrical loads in various industrial applications. Part of the 3RT20 series, this 3-pole contactor is rated for AC-3e/AC-3 duty with a current rating of 16A and a power rating of 7.5 kW at 400V. It features a 125V DC coil with a wide operating range of 0.7−1.25×Uc​. The integrated suppressor diode protects against voltage spikes, while the 1 NC auxiliary contact provides additional control flexibility. This contactor uses spring-loaded terminals for quick and secure wiring, eliminating the need for screw tightening. Its compact frame size S00 makes it ideal for space-constrained installations. A plugged-on series resistor is also included.

Key Features & Benefit

• Exceptional Performance: With an AC-3e/AC-3 rating of 16A and 7.5 kW, this contactor is built for demanding switching tasks.
• Reliable DC Operation: The 125V DC coil with a wide voltage tolerance ensures stable and reliable performance in direct current systems.
• Integrated Protection: The built-in suppressor diode mitigates voltage surges, protecting sensitive control components and extending the lifespan of the contactor.
• Fast & Secure Wiring: The innovative spring-loaded terminals offer a vibration-proof and maintenance-free connection, significantly reducing installation time.
• Compact Design: The S00 frame size allows for high-density mounting, saving valuable panel space.
• Versatile Control: The included 1 NC auxiliary contact enables easy integration into control circuits for status signaling or interlocking.

Function

The Siemens 3RT2018-2KG42-0LA0 contactor functions by using an electromagnet to close or open contacts, thereby controlling the flow of power to an electrical load. It is primarily used for switching motors, heaters, and other inductive loads. The suppressor diode is a critical component that prevents harmful voltage transients, or “back-EMF,” from the coil when the circuit is de-energized. This is particularly important for protecting the control circuit and power supply from damage. The spring-loaded terminals provide a constant, strong clamping force on the wire, ensuring a reliable electrical connection that won’t loosen over time due to vibrations or temperature fluctuations.

For more our products visit turll