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Siemens 3RT2025-1BB44-3MA0 Contactor — 17A 7.5kW 24V DC

Siemens 3RT2025-1BB44-3MA0 3-pole power contactor with captive switch.

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ManufacturerSiemens

Part number3RT2025-1BB44-3MA0

Type Power Contactor

AC-3e/AC-3 Rating 17A, 7.5kW @ 400V

Poles 3

Coil Voltage 24V DC

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AC-3e/AC-3 motor rating 3-pole configuration 2 NO + 2 NC captive auxiliary contacts 24V DC coil S0 frame size No retrofittable surge suppressor

Product description

The Siemens 3RT2025-1BB44-3MA0 is a robust 3-pole power contactor designed for AC-3e/AC-3 duty, rated at 17 A and 7.5 kW for 400 V systems. This S0-sized unit features a 24 V DC coil and is equipped with 2 NO + 2 NC auxiliary contacts. A key characteristic is its captive auxiliary switch, ensuring a secure connection, and it is designed such that no surge suppressor can be retrofitted.

This contactor is ideal for applications in industrial automation, motor control, and power switching where a reliable 24V DC operated device with a fixed auxiliary contact configuration is required. Its captive switch design enhances reliability in environments prone to vibration.

Stanlo Automation, your trusted veteran-owned surplus parts distributor, offers the Siemens 3RT2025-1BB44-3MA0. We specialize in providing high-quality industrial automation components. Secure your essential parts from Stanlo and ensure the continuous operation of your facility.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	17A, 7.5kW @ 400V
Poles	3
Coil Voltage	24V DC
Auxiliary Contacts	2 NO + 2 NC
Terminal Type	Screw
Size	S0

Common applications

Motor control

Industrial automation

Machine safety

Control panels

Power switching

Automation systems

Compatible systems

Industrial control panels Automation equipment Motor starter assemblies

Also known as

Siemens 3RT2025-1BB44-3MA0 SIRIUS 3RT2025-1BB44-3MA0 Siemens 17A DC Contactor

Replaces / compatible with

Suitable for applications requiring a permanently configured auxiliary contact block and a 24V DC coil. Compatible with Siemens SIRIUS 3RT2 system accessories.

Technical note

Expert tip

The integrated captive auxiliary switch ensures high reliability in environments with significant vibration, making it suitable for heavy machinery applications.

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Frequently asked questions

What is unique about the auxiliary switch on the Siemens 3RT2025-1BB44-3MA0?

The Siemens 3RT2025-1BB44-3MA0 features a captive auxiliary switch, which is integrated and not removable, ensuring a secure connection and preventing accidental dislodging. It also cannot have a surge suppressor retrofitted.