3RT2026-1FB40

The 3RT2026-1FB40 is also a 24V DC coil, but it uses a plug-in diode combination instead of a varistor for surge suppression. It has an AC-3 rated capacity of 25A/11kW, 1NO+1NC auxiliary contacts, and an insulation voltage of 690V. It is suitable for applications that require simple circuitry and where the suppression components can be replaced individually.

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Siemens 3RT2026-1FB40 24V DC Diode Coil Contactor 25A

Product Positioning

The 3RT2026-1FB40 is also a 24V DC coil S0 housing contactor, but its surge suppression method differs from the 1KB40: the 1FB40 uses a plug-in diode assembly instead of a varistor. The diode suppression circuit is simple in construction, lower in cost, and can be replaced individually, making it suitable for production line applications where delayed release time requirements are not so stringent, but where spare parts commonality and ease of maintenance are important.

Core Product Advantages and Features

Plug-in diode surge suppression

The device uses a replaceable diode combination to absorb power-off surges from the coil, and the suppression element can be replaced individually during maintenance.

24V DC standard control voltage

It is compatible with the output voltage of most PLCs/relays, and the wiring design is intuitive.

AC-3 25A/11kW main circuit

It meets the S0 housing standard rating and is suitable for most small and medium power three-phase motors.

690V insulation voltage, 6kV impulse withstand voltage

Both the main circuit and the auxiliary circuit have high insulation levels, improving the overall safety margin of the panel.

project	Specification
model	3RT2026-1FB40
AC-3 rated current	25 A
AC-3 Rated Power (400V)	11 kW
Extreme number	3P
Coil Specifications	24 V DC, plug-in diode combination suppression
Auxiliary contacts	1 NO + 1 NC
Main circuit terminals	Screw terminals
net weight	Approximately 0.598 kg
Rated usage category	AC-3 (Motor Start/Stop)
Insulation voltage (pollution level 3)	690 V
Rated impulse withstand voltage	6 kV
Frontal protection level	IP20 (according to IEC 60529)
Mechanical life (typical value)	10 million cycles
Ambient operating temperature	-25°C ~ +60°C
Applicable Standards	IEC 60947-4-1 / IEC 60947-5-1
chassis code	S0
Installation method	35mm DIN rail or panel locking

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3RT2026-1BW40

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3RT2026-1BP40

The 3RT2026-1BP40 is a 230V DC coil specification. The main circuit maintains the standard AC-3 25A/11kW/400V rating, with 1NO+1NC auxiliary contacts. It is suitable for existing 230V DC control power supplies and is a spare part for existing panel retrofits or repairs that do not require additional step-down modules.