Siemens 3RT2037-3NB34-3MA0 Power Contactor 65 A, 30 kW, 3-Pole AC-3/AC-3e, Integrated Varistor Original Brand New

Overview

The Siemens 3RT2037-3NB34-3MA0 is a high-performance industrial power contactor engineered for reliable motor control across demanding applications. Designed for AC-3/AC-3e switching duties, this 3-pole contactor delivers 65 A operational current and supports 30 kW at 400 V, making it ideal for motor starters, power distribution, and automation environments. With a robust construction and integrated varistor protection, it ensures long service life, reduced wear, and dependable switching performance.

Equipped with 2 NO + 2 NC auxiliary contacts, a screw terminal main circuit, and spring-loaded terminals for control/auxiliary circuits, this Siemens S2-size contactor guarantees secure wiring, simplified installation, and excellent operational efficiency. The 20–33 V AC/DC coil voltage supports versatile control applications while maintaining low energy consumption.

Benefit

Highly Reliable Switching Performance

Built for AC-3/AC-3e motor switching, ensuring safe and durable operation for industrial motors and loads.

Integrated Varistor Protection

Reduces electrical noise, coil surges, and voltage spikes for extended equipment lifespan.

Simplified Installation & Secure Connections

Screw terminals for the main circuit and spring-loaded terminals for auxiliary/control circuits ensure fast, vibration-resistant wiring.

Versatile Control Voltage

20–33 V AC/DC coil rating accommodates multiple control system configurations.

Compact S2 Design

Space-saving size ideal for switchboards, control panels, and automation modules.

Features / Function

• Model: Siemens 3RT2037-3NB34-3MA0

• Type: Power Contactor

• Switching Category: AC-3 / AC-3e

• Rated Operational Current: 65 A

• Rated Power: 30 kW @ 400 V

• Poles: 3-pole

• Coil Voltage: 20–33 V AC/DC, 50/60 Hz

• Auxiliary Contacts: 2 NO + 2 NC

• Integrated Varistor: Yes (coil surge protection)

• Main Circuit Terminals: Screw terminal

• Control/Aux Circuit Terminals: Spring-loaded terminal

• Size: S2

• Captive Auxiliary Switch: Included

• Applications: Motor starters, automation panels, control cabinets, conveyor systems, pumps, compressors.

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