SIEMENS 3RT1056-2AM36

Siemens SIRIUS 3RT1056-2AM36 Power Contactor

Description

This is a Siemens SIRIUS 3RT1056-2AM36 power contactor, a robust 3-pole device designed for switching motors up to 90 kW at 400V. It belongs to the S6 size category and operates with a 110V AC (50Hz) / 120V AC (60Hz) control coil. This contactor is a reliable component for heavy-duty industrial applications and comes equipped with a 3RH1921-2DA11 auxiliary contact block.

Specifications

• Manufacturer: Siemens
• Product Series: SIRIUS
• Type: Power Contactor
• Model: 3RT1056-2AM36
• Poles: 3-Pole
• Size: S6
• Rated Power (AC-3, 400V): 90 kW
• Rated Current (AC-3, 400V): 185 A
• Rated Current (AC-1): 215 A
• Coil Voltage: 110V AC at 50Hz / 120V AC at 60Hz
• Auxiliary Contacts (mounted): 3RH1921-2DA11 (2NO + 2NC)

Label Info

• Standard: IEC/EN 60947-4-1
• Rated Insulation Voltage (Ui): 1000V
• Rated Impulse Withstand Voltage (Uimp): 8kV
• Certifications: UL, CSA, CE

Application

Ideal for motor control in applications such as conveyors, pumps, fans, and other industrial machinery requiring high-power switching capabilities.

Country of Origin

Made in Germany.

CO2 Impact

By choosing this pre-owned contactor, you are helping to avoid 87.5 kg of CO2 emissions, which is comparable to the emissions from driving a car for 438 kilometers.

Availability

This unit is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the correct coil voltage for this 3RT1056-2AM36 contactor?

The suffix ‘-2AM36’ in the model number indicates the coil voltage. This unit is designed for a control voltage of 110V AC at 50 Hz or 120V AC at 60 Hz.

Can I use modern 3RT2 accessories with this obsolete 3RT1 contactor?

No, accessories like auxiliary contacts and overload relays are generally not cross-compatible between the 3RT1 and the successor 3RT2 series due to differences in physical design. You must use accessories specified for the 3RT1 S6 size.

What are the recommended tightening torques for the main power terminals?

The label specifies a torque of 10 to 14 Nm (89 to 124 lb.in) for the main screw terminals (size M8). It is crucial to use a calibrated torque wrench to ensure a secure and safe connection.

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Last Update: March 13, 2026