3RT2026-1NB30

The 3RT2026-1NB30 is an S0 housing power contactor with a wide-range electronic coil design of 21-28V AC/DC, capable of simultaneously handling AC and DC control circuits. The AC-3 rated capacity is 25A/11kW, and it comes standard with 1NO+1NC auxiliary contacts, making it suitable for panel applications with unstable control voltage or cross-system integration.

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Siemens 3RT2026-1NB30 Electronic Coil Contactor 21-28V AC/DC 25A

Product Positioning

The 3RT2026-1NB30 is a rare model in the SIRIUS 3RT2 series S0 housing contactor that uses an "electronic wide-range coil": a single coil can cover AC and DC control voltages of 21-28V, eliminating the need to prepare parts separately depending on whether the site uses AC or DC. For situations where the control voltage fluctuates slightly due to cable voltage drop or PLC output module errors, the tolerance range of this coil effectively reduces the complexity of malfunctions and spare parts management, making it a commonly recommended model by Kensun Motors for automation panel manufacturers.

Core Product Advantages and Features

Wide-range electronic coil

The 21-28V AC/DC common design eliminates the need for separate AC/DC components, and the same coil covers most low-voltage control circuit requirements.

AC-3 measured 25A/11kW

The main circuit has a rated current of 25A, corresponding to an 11kW motor load at 400V, and conforms to the S0 housing standard specifications.

1NO+1NC standard auxiliary contact

It has one set of normally open and one set of normally closed auxiliary contacts built in, which facilitates the wiring of control circuits such as interlocking and alarm feedback.

Built-in surge suppression design

The coil end integrates a surge suppression element to reduce interference to surrounding electronic components during switching.

project	Specification
model	3RT2026-1NB30
AC-3 rated current	25 A
AC-3 Rated Power (400V)	11 kW
Extreme number	3P
Coil Specifications	21-28 V AC/DC wide-range electronic coil
coil frequency	50/60 Hz
Auxiliary contacts	1 NO + 1 NC
Main circuit terminals	Screw terminals
net weight	Approximately 0.578 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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3RT2026-2AC20

S0 frame power contactor, AC-3 rated 25A/11kW (400V), 24V AC low voltage coil enhances maintenance and operation safety, spring terminals, 1NO+1NC auxiliary contacts, dual frequency 50/60Hz universal.

3RT2026-1KB40

The 3RT2026-1KB40 is a 24V DC coil contactor with a built-in varistor to suppress switching surges. It has a holding power as low as 4.5W, an AC-3 rated power of 25A/11kW, and 1NO+1NC auxiliary contacts. The manufacturer also positions it as a coupling contactor, suitable for motor control panel interlocking circuits.

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.