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Siemens 3RT2024-1FB44-3MA0 Contactor with Diode - 12A, 24V DC

Siemens 3RT2024-1FB44-3MA0 3-pole power contactor with diode combination.

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ManufacturerSiemens

Part number3RT2024-1FB44-3MA0

Type Power Contactor

Poles 3

AC-3e/AC-3 Rating 12A, 5.5 kW / 400 V

Coil Voltage 24V DC

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AC-3e/AC-3 rated 24V DC coil 2 NO + 2 NC auxiliary contacts Size S0 Captive auxiliary switch Integrated diode combination Screw terminals

Product description

The Siemens 3RT2024-1FB44-3MA0 is a 3-pole power contactor for AC-3e/AC-3 applications, rated at 12 A and 5.5 kW at 400 V. It features a 24 V DC coil, 2 NO + 2 NC auxiliary contacts, and a captive auxiliary switch. This size S0 contactor includes a plugged-in diode combination for coil de-energization protection and uses screw terminals.

This DC-operated contactor is designed for applications where rapid and safe de-energization of the coil is required. The integrated diode combination suppresses inductive voltage spikes generated when the coil is switched off, protecting control circuitry. It is ideal for industrial automation and motor control.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation components, offers the Siemens 3RT2024-1FB44-3MA0. We provide reliable, cost-effective solutions to keep your systems running efficiently with quality surplus parts.

Technical specifications

Type	Power Contactor
Poles	3
AC-3e/AC-3 Rating	12A, 5.5 kW / 400 V
Coil Voltage	24V DC
Auxiliary Contacts	2 NO + 2 NC
Terminal Type	Screw
Size	S0
Auxiliary Switch	Captive
Coil Suppression	Plugged-in Diode Combination

Common applications

DC Motor Control

Industrial Automation

Coil Suppression

Control Panels

Renewable Energy

Automation Systems

Compatible systems

DC control systems Siemens automation panels 24V DC power sources Systems requiring inductive coil suppression

Also known as

Siemens 3RT2024-1FB44-3MA0 Siemens Diode Contactor 3RT2 S0 DC Diode

Replaces / compatible with

This contactor replaces Siemens 3RT2 series contactors with a 24V DC coil and captive auxiliary switches, offering integrated coil suppression. It is compatible with Siemens S0 accessories.

Technical note

Expert tip

The diode combination in the 3RT2024-1FB44-3MA0 offers efficient coil suppression, allowing for faster coil de-energization compared to RC suppressor modules.

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Frequently asked questions

What is the function of the diode combination in the Siemens 3RT2024-1FB44-3MA0?

The plugged-in diode combination in the Siemens 3RT2024-1FB44-3MA0 provides a free-wheeling path for the inductive current when the coil is de-energized, thus suppressing the back EMF and protecting control circuitry.