3RT2026-1BF40

The 3RT2026-1BF40 uses a 110V DC coil, with a main circuit rated AC-3 of 25A/11kW/400V, 1NO+1NC auxiliary contacts, and screw terminals. It is an electrical and dimensional compatible replacement for the discontinued 3RT1026-1BF40 and is suitable for the repair and replacement of DC control panels.

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Siemens 3RT2026-1BF40 110V DC coil contactor 25A 11kW

Product Positioning

The 3RT2026-1BF40 has a coil voltage of 110V DC and is one of the models in the SIRIUS 3RT2 series that corresponds to older DC operating power supplies. The manufacturer lists it as an electrical and dimensional compatible replacement for the discontinued 3RT1026-1BF40. For older switchboards that still use 110V DC as their protection and control power supply, this model can be used directly for replacement without requiring redesign of the control circuit wiring.

Core Product Advantages and Features

110V DC coil

It corresponds to a 110V DC operating power supply system and is commonly found in old protection panels and DC control circuits.

3RT1026 Series Compatible Replacement

The original manufacturer listed it as a 3RT1026-1BF40 electrical and size compatible replacement, eliminating the need for wiring modifications.

AC-3 25A/11kW main circuit

The 3-pole design covers most small and medium power three-phase motor start-stop applications.

Modular auxiliary contact base

The 1NO+1NC auxiliary contacts are removable and replaceable, reducing long-term maintenance costs.

project	Specification
model	3RT2026-1BF40
AC-3 rated current	25 A
AC-3 Rated Power (400V)	11 kW
Extreme number	3P
Coil Specifications	110 V DC
auxiliary contacts	1 NO + 1 NC (detachable)
Main circuit terminals	Screw terminals
Original equipment manufacturer (OEM) compatible replacement	3RT1026-1BF40 (Discontinued older model)
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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3RT2026-1BG40

The 3RT2026-1BG40 uses a 125V DC coil and is a direct replacement for the 3RT1026 series contact sockets of the same specifications. It features an AC-3 rated 25A/11kW/400V main circuit, 1NO+1NC auxiliary contacts, and screw terminals, making it suitable for maintenance and replacement of DC control circuits in distribution panels.

3RT2026-1BB44

Based on the standard 24V DC coil, the 3RT2026-1BB44 upgrades the auxiliary contacts to 4 points (2NO+2NC). The AC-3 rated 25A/11kW/400V remains unchanged, making it suitable for control panel designs that require multiple sets of contacts, such as indicator light feedback and interlocking circuits.

3RT2026-1AP60

The 3RT2026-1AP60 features a dual-frequency coil design (220V AC 50Hz/240V AC 60Hz), allowing a single part number to accommodate both 50Hz and 60Hz power systems. The AC-3 rated capacity is 25A/11kW, with 1NO+1NC auxiliary contacts, making it suitable for export machines and cross-regional equipment.