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Siemens SIRIUS 3RT1045-3BB40 Contactor — 80A AC-3, 37kW, 24V DC Coil

Siemens 3RT1045-3BB40 3-pole power contactor with DC coil.

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ManufacturerSiemens

Part number3RT1045-3BB40

Type Power Contactor

Manufacturer Siemens

Part Number 3RT1045-3BB40

AC-3 Current 80 A

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AC-3 switching capability 37 kW power rating at 400V 24V DC coil 3-pole configuration Size S3 Spring-type terminals

Product description

The Siemens 3RT1045-3BB40 is a 3-pole power contactor designed for AC-3 applications, rated at 80 amps and 37 kW at 400V. This unit features a 24V DC coil and is housed in a Size S3 frame, equipped with spring-type terminals for secure connections.

This contactor is ideal for controlling three-phase motors and other industrial loads where a DC control voltage is specified. Its robust design makes it suitable for use in motor control centers, automation systems, and power distribution within manufacturing plants.

Stanlo Automation, a veteran-owned business specializing in surplus industrial parts, offers the Siemens 3RT1045-3BB40. Sourcing this phased-out component from us ensures continuity for your operations, providing a cost-effective solution for maintaining your existing machinery.

Technical specifications

Type	Power Contactor
Manufacturer	Siemens
Part Number	3RT1045-3BB40
AC-3 Current	80 A
Power	37 kW at 400V
Coil Voltage	24 V DC
Poles	3
Size	S3
Terminal Type	Spring-type
Status	Phased-out

Common applications

Motor control

Industrial automation

DC control systems

Machine building

Control panels

Power distribution

Compatible systems

DC controlled motor starters Automation systems Control panels with DC power

Also known as

Siemens SIRIUS 3RT1045 DC 3RT1045 DC Contactor Siemens S3 DC Contactor

Replaces / compatible with

This part is phased out. The preferred successor is the Siemens SIRIUS 3RT2038-3KB40.

Technical note

Expert tip

This phased-out contactor requires a 24V DC supply for its coil, ensuring safe and reliable switching in systems designed for direct current control circuits.

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Frequently asked questions

What is the coil voltage for the Siemens 3RT1045-3BB40 power contactor?

The Siemens 3RT1045-3BB40 power contactor utilizes a 24V DC coil. This direct current voltage is necessary to activate the contactor's electromagnetic system for operation.