Siemens 3RT2037-1KB40 Power Contactor Ac-3E/Ac-3 with Integrated Varistor

The Siemens 3RT2037-1KB40 is a powerful three-pole power contactor from the SIRIUS 3RT2 series, rated for 65 A in AC-3 operation at 400 V. It has a 24 V DC coil, an integrated varistor for coil protection, and auxiliary contacts (1 NO + 1 NC). Size S2, designed for use with PLC outputs. Its robust design, high insulation voltage, and long mechanical service life make it ideal for industrial motor switching and control applications.

Technical Details:

Brand: Siemens
Model: 3RT2037-1KB40
Poles: 3 (three main contacts)
AC-3 Rated Current: 65 A at 400 V
AC-1 Rated Current: 80 A at 400 V
Coil Voltage: 24 V DC
Auxiliary Contacts: 1 NO + 1 NC
Protection: Integrated varistor for coil overvoltage suppression
Size: S2
Insulation Voltage: 690 V for main circuit
Condition: Comparable to images

Note:

For detailed technical data and processing instructions, we strongly recommend consulting the original data sheets or contacting the manufacturer directly.

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