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Siemens 3RT2026-2FB40 Power Contactor - 25A, 24V DC, Diode Combo

Siemens 3RT2026-2FB40 3-pole power contactor with 24V DC coil and diode combination.

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ManufacturerSiemens

Part number3RT2026-2FB40

Type Power Contactor

AC-3e/AC-3 Rating 25A

Max Power 11 kW / 400 V

Poles 3

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AC-3e/AC-3 rated 3-pole configuration 24V DC coil 1 NO + 1 NC auxiliary contacts Integrated diode combination Spring-loaded terminals

Product description

The Siemens 3RT2026-2FB40 is a 3-pole power contactor designed for AC-3e/AC-3 applications, rated at 25A and 11kW at 400V. This model operates with a 24V DC coil and features a plugged-in diode combination for coil suppression, which reduces switching noise and protects downstream electronics. It includes 1 normally open (NO) and 1 normally closed (NC) auxiliary contact, spring-loaded terminals, and is sized at S0.

This contactor is ideal for motor control and switching applications where DC control circuits are present. The integrated diode combination offers superior coil protection compared to simple varistors, making it suitable for demanding industrial automation environments.

Stanlo Automation, your trusted veteran-owned supplier of industrial surplus, carries the Siemens 3RT2026-2FB40. We ensure you receive quality, tested parts with efficient service and fast shipping to keep your operations running without interruption.

Technical specifications

Type	Power Contactor
AC-3e/AC-3 Rating	25A
Max Power	11 kW / 400 V
Poles	3
Coil Voltage	24 V DC
Auxiliary Contacts	1 NO + 1 NC
Coil Suppression	Plugged-in diode combination
Terminal Type	Spring-loaded
Size	S0

Common applications

Motor control

DC power switching

Control circuits

Automation systems

Industrial machinery

Relay applications

Compatible systems

DC control circuits PLC output modules Automation systems

Also known as

Siemens 3RT2026-2FB40 Contactor SIRIUS 3RT2 DC coil Siemens 25A diode contactor

Replaces / compatible with

This contactor is part of the Siemens SIRIUS 3RT2 series, offering integrated diode-based coil suppression. Consult Siemens documentation for compatibility.

Technical note

Expert tip

The diode combination in the 3RT2026-2FB40 provides fast and effective suppression of inductive voltage spikes from the 24V DC coil.

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Frequently asked questions

What is the function of the diode combination in the Siemens 3RT2026-2FB40?

The plugged-in diode combination in the Siemens 3RT2026-2FB40 acts as a suppressor for the DC coil. It clamps the back-EMF voltage, protecting the coil and connected control electronics from damaging transients when the coil is switched off.