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Siemens 3RT2036-1NB34-3MA0 51A 22kW 3-Pole Power Contactor

Siemens 3RT2036-1NB34-3MA0 51A 3-pole power contactor with 20-33V AC/DC coil.

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ManufacturerSiemens

Part number3RT2036-1NB34-3MA0

Poles 3

Rated operational current AC-3e/AC-3 (690V) 51 A

Rated operational power AC-3e/AC-3 (400V) 22 kW

Coil voltage 20-33 V AC/DC

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AC-3e/AC-3 rating Universal AC/DC coil Integrated varistor 2 NO + 2 NC auxiliary contacts Captive auxiliary switch Size S2

Product description

The Siemens 3RT2036-1NB34-3MA0 is a high-performance 3-pole power contactor for AC-3e/AC-3 applications, rated at 51A and 22kW for 400V systems. It operates with a 20-33V AC/DC coil and features an integrated varistor for overvoltage protection. This contactor comes with 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, including a captive auxiliary switch for enhanced functionality. Screw terminals ensure secure main circuit connections.

This contactor is engineered for demanding industrial applications, including motor control, automation systems, and load switching. The inclusion of a captive auxiliary switch provides additional reliable switching contacts for control circuits, interlocks, or signaling. Its robust design and comprehensive features make it suitable for various industrial sectors.

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Technical specifications

Poles	3
Rated operational current AC-3e/AC-3 (690V)	51 A
Rated operational power AC-3e/AC-3 (400V)	22 kW
Coil voltage	20-33 V AC/DC
Frequency	50/60 Hz
Auxiliary contacts	2 NO + 2 NC
Captive auxiliary switch	Yes
Terminals	Screw
Varistor	Integrated

Common applications

Motor control

Load switching

Industrial automation

Control panels

Machine building

Automation systems

Compatible systems

Industrial control panels PLC-based automation Motor control circuits

Also known as

Siemens 3RT2036 Contactor with Aux 3RT20 Series Contactor Siemens 51A 2NO2NC Contactor

Replaces / compatible with

The Siemens 3RT2036-1NB34-3MA0 is a versatile contactor for motor starting and load control. It can replace similar Siemens contactors or offer enhanced functionality with its additional auxiliary contacts in existing systems.

Technical note

Expert tip

The captive auxiliary switch is pre-wired internally and cannot be removed, ensuring its reliability for critical control functions.

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Frequently asked questions

What is the function of the captive auxiliary switch on the Siemens 3RT2036-1NB34-3MA0?

The captive auxiliary switch on the Siemens 3RT2036-1NB34-3MA0 provides additional reliable contacts for control, signaling, or interlocking circuits. Its captive design ensures it is permanently attached and functional.