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Siemens 3RT1035-3BB40 SIRIUS 3RT Power Contactor — 40A, 24V DC Coil

Siemens 3RT1035-3BB40 3-pole power contactor, 40A rating, 24V DC coil.

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ManufacturerSiemens

Part number3RT1035-3BB40

Poles 3

AC-3 Rating 40 A

Power 18.5 kW @ 400V

Coil Voltage 24V DC

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AC-3 rated for motor switching 40A continuous current 24V DC coil Spring-type terminals Size S2 SIRIUS 3RT series

Product description

The Siemens 3RT1035-3BB40 is a 3-pole power contactor within the SIRIUS 3RT series, featuring an AC-3 rating of 40A and a power handling capability of 18.5 kW at 400V. This model is equipped with a 24V DC coil and utilizes spring-type terminals for connection. It is designed for industrial control and motor switching applications and is classified under Size S2.

This DC-coil powered contactor is ideal for applications requiring precise control or where a DC control voltage is readily available, such as in renewable energy systems, battery-powered equipment, or specialized industrial machinery. It ensures reliable switching of loads up to its rated capacity.

Stanlo Automation, your veteran-owned source for surplus industrial automation parts, offers the Siemens 3RT1035-3BB40. Ensure operational continuity with high-quality, cost-effective components from our extensive inventory.

Technical specifications

Poles	3
AC-3 Rating	40 A
Power	18.5 kW @ 400V
Coil Voltage	24V DC
Terminals	Spring-type
Size	S2
Series	SIRIUS 3RT

Common applications

Motor control

Industrial automation

DC control systems

Renewable energy

Specialized machinery

Control panels

Compatible systems

DC control circuits Motor starters Automation control panels

Also known as

Siemens 3RT1035-3BB40 Contactor SIRIUS 3RT1035 40A 24V DC Contactor

Replaces / compatible with

This unit is a phased-out product. The preferred successor is the Siemens SIRIUS 3RT2028-2BB40. Always verify electrical and mechanical compatibility.

Technical note

Expert tip

The 24V DC coil on the 3RT1035-3BB40 offers lower power consumption compared to AC coils, making it suitable for battery-powered or energy-efficient control systems.

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Frequently asked questions

Can the Siemens 3RT1035-3BB40 contactor be used with AC loads?

While this contactor has an AC-3 rating for motor loads, its coil operates on DC voltage (24V DC). It is suitable for controlling AC circuits, but the coil requires a DC power source. Always check the specific load requirements against the contactor's ratings.