Siemens 3RT2038-1AD04 SIRIUS Power Contactor, 80A, 37kW, 42V AC Coil, 3-Pole, Size S2, 2NO+2NC Original Brand New

Overview

The Siemens 3RT2038-1AD04 SIRIUS Power Contactor is a robust and reliable switching device designed for controlling electric motors and other loads up to 80 A and 37 kW at 400 V. As part of the SIRIUS modular system, this 3-pole contactor in Size S2 is engineered for high performance and efficiency. It features a specific 42 V AC, 50 Hz coil voltage and is equipped with 2 Normally Open (NO) and 2 Normally Closed (NC) auxiliary contacts for comprehensive control and signaling within industrial applications.

Key Specification

• Product ID: 3RT2038-1AD04
• Product Series: SIRIUS 3RT2 Contactor
• Rated Operating Current (AC-3e/AC-3): 80 A
• Rated Power (at 400V): 37 kW
• Number of Poles: 3-pole
• Control Supply Voltage (Coil): 42 V AC, 50 Hz
• Size: S2
• Auxiliary Contacts: 2 NO + 2 NC (Removable auxiliary switch)
• Terminal Type: Screw Terminal

Benefit

1. High Switching Capacity: Rated for 80 A and 37 kW, making it suitable for demanding motor control and load switching tasks.
2. Versatile Control: Includes a generous set of $2\text{ NO}+2\text{ NC}$ auxiliary contacts for enhanced interlocking, signaling, and control circuit integration.
3. Space-Saving Design: As a Size S2 contactor within the compact SIRIUS modular system, it offers a high performance-to-size ratio.
4. Flexible Wiring: Utilizes robust screw terminals for secure and straightforward main and auxiliary circuit wiring.
5. Simplified Maintenance: Features a removable auxiliary switch block, allowing for easier replacement and configuration without disturbing main connections.
6. Global Standard Compliance: SIRIUS products meet international standards, ensuring worldwide applicability (e.g., IEC, UL/CSA).

Function

The Siemens 3RT2038-1AD04 acts as an electrically operated switch (contactor) for the main power circuit. When the $42\text{ V AC}$ control voltage is applied to the coil, the electromagnetic field closes the 3 main power contacts, connecting the $400\text{ V}$ power supply to the load (e.g., a $37\text{ kW}$ motor). When the coil voltage is removed, the contacts open, isolating the load. The auxiliary contacts switch state simultaneously to provide feedback or control for safety and logic circuits. It is designed for switching loads classified under AC-3e/AC-3 standards, which typically involve switching squirrel-cage motors during operation.