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Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size
Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size
Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size
Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size
Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size

SIEMENS

Siemens 3RT2027-1BB40 Power Contactor 32 A, 15 kW, 3-Pole, 24 V DC, AC-3e/AC-3, S0 Size Original Brand New

Model / SKU3RT2027-1BB40

High-performance power contactor designed for switching motors and other loads up to 32 A (AC-3e/AC-3). It features a 24 V DC operating coil, a mechanical service life of up to 30 million switching cycles, and integrated 1 NO + 1 NC auxiliary contacts. Size S0, with reliable screw terminals.

Original price was: $257.76.Current price is: $144.18.
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  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 3RT2027-1BB40 is a high-performance industrial power contactor engineered for reliable switching of motors and electrical loads. Designed to meet demanding applications, this 3-pole contactor supports AC-3e/AC-3 operation at 32 A and up to 15 kW at 400 V, making it ideal for modern automation and control systems. Its compact S0 size, durable build, and integrated auxiliary contacts (1 NO + 1 NC) ensure exceptional flexibility and efficiency in a wide range of industrial environments.

Benefit

  • High Switching Reliability: Built for continuous use in industrial motor control applications.

  • Energy-Efficient Coil Design: 24 V DC coil ensures lower control circuit consumption.

  • Compact Size S0: Saves panel space while maintaining full performance.

  • Flexible Integration: Includes 1 NO + 1 NC auxiliary contacts for advanced control logic.

  • Durable Construction: Siemens-grade quality ensures long lifespan and reduced downtime.

  • Secure Wiring: Screw terminal design improves installation safety and stability.

Function

  • Switching and control of 3-phase motors and electrical loads

  • Suitable for AC-3 and AC-3e motor-starting applications

  • Supports operational currents up to 32 A

  • Motor power switching up to 15 kW at 400 V

  • Provides reliable auxiliary signaling via integrated 1 NO + 1 NC contacts

  • Designed for easy installation in industrial control cabinets and automation systems

Application

The 3RT2027-1BB40 is perfect for applications requiring reliable switching of 3-phase loads, including:

  • Starting and stopping standard asynchronous (squirrel-cage) motors.

  • Controlling pumps, fans, and compressors.

  • Switching resistance loads (e.g., heating elements).

  • Integration into automated machinery, conveyor systems, and HVAC systems.

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Specifications

SKU / Model3RT2027-1BB40
BrandSIEMENS
product brand nameSIRIUS
product designationPower contactor
product type designation3RT2
size of contactorS0
product extension-
● function module for communicationNo
● auxiliary switchYes
power loss [W] for rated value of the current at AC in hot operating state8.1 W
● per pole2.7 W
power loss [W] for rated value of the current without load current share typical5.9 W
surge voltage resistance-
● of main circuit rated value6 kV
● of auxiliary circuit rated value6 kV
maximum permissible voltage for safe isolation between coil and main contacts acc. to EN 60947-1400 V
shock resistance at rectangular impulse-
shock resistance with sine pulse-
mechanical service life (switching cycles)-
● of contactor typical10 000 000
● of the contactor with added electronically optimized auxiliary switch block typical5 000 000
● of the contactor with added auxiliary switch block typical10 000 000
reference code acc. to IEC 81346-2Q
installation altitude at height above sea level maximum2 000 m
ambient temperature-
● during operation-25 ... +60 °C
● during storage-55 ... +80 °C
relative humidity minimum10 %
relative humidity at 55 °C acc. to IEC 60068-2-30 maximum95 %
number of poles for main current circuit3
number of NO contacts for main contacts3
operating voltage at AC-3 rated value maximum690 V
● at AC-1 at 400 V at ambient temperature 40 °C rated value50 A
● at AC-1-
— up to 690 V at ambient temperature 40 °C rated value50 A
— up to 690 V at ambient temperature 60 °C rated value42 A
● at AC-4 at 400 V rated value22 A
● at AC-5a up to 690 V rated value44 A
● at AC-5b up to 400 V rated value26.5 A
— up to 230 V for current peak value n=20 rated value30.8 A
— up to 400 V for current peak value n=20 rated value30.8 A
— up to 500 V for current peak value n=20 rated value27 A
— up to 690 V for current peak value n=20 rated value21 A
● at AC-6a-
— up to 230 V for current peak value n=30 rated value20.5 A
— up to 400 V for current peak value n=30 rated value20.5 A
— up to 500 V for current peak value n=30 rated value18 A
— up to 690 V for current peak value n=30 rated value18 A
minimum cross-section in main circuit at maximum AC-1 rated value10 mm²
operational current for approx. 200000 operating cycles at AC-4-
operational current-
● at 1 current path at DC-1-
● with 2 current paths in series at DC-1-
● with 3 current paths in series at DC-1-
● at 1 current path at DC-3 at DC-5-
● with 2 current paths in series at DC-3 at DC-5-
● with 3 current paths in series at DC-3 at DC-5-
— at 24 V rated value35 A
— at 110 V rated value35 A
— at 220 V rated value10 A
— at 440 V rated value0.6 A
— at 600 V rated value0.6 A
operating power-
● at AC-3-
— at 400 V rated value15 kW
— at 500 V rated value15 kW
— at 690 V rated value18.5 kW
operating power for approx. 200000 operating cycles at AC-4-
● up to 230 V for current peak value n=20 rated value12.2 kV·A
● up to 400 V for current peak value n=20 rated value21.3 kV·A
● up to 500 V for current peak value n=20 rated value23.3 kV·A
● up to 690 V for current peak value n=20 rated value25 kV·A
operating apparent power at AC-6a-
● up to 230 V for current peak value n=30 rated value8.1 kV·A
● up to 400 V for current peak value n=30 rated value14.2 kV·A
● up to 500 V for current peak value n=30 rated value15.5 kV·A
● up to 690 V for current peak value n=30 rated value21.5 kV·A
short-time withstand current in cold operating state up to 40 °C-
● limited to 1 s switching at zero current maximum499 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 5 s switching at zero current maximum395 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 10 s switching at zero current maximum260 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 30 s switching at zero current maximum186 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 60 s switching at zero current maximum152 A; Use minimum cross-section acc. to AC-1 rated value
no-load switching frequency-
operating frequency-
● at AC-1 maximum1 000 1/h
● at AC-2 maximum750 1/h
● at AC-3 maximum750 1/h
● at AC-4 maximum250 1/h
type of voltage of the control supply voltageDC
control supply voltage at DC-
● rated value24 V
operating range factor control supply voltage rated value of magnet coil at DC-
● initial value0.8
● full-scale value1.1
closing power of magnet coil at DC5.9 W
holding power of magnet coil at DC5.9 W
closing delay-
opening delay-
● at DC15 ... 17.5 ms
arcing time10 ... 10 ms
control version of the switch operating mechanismStandard A1 - A2
number of NC contacts for auxiliary contacts instantaneous contact1
number of NO contacts for auxiliary contacts instantaneous contact1
operational current at AC-12 maximum10 A
operational current at AC-15-
● at 230 V rated value10 A
● at 400 V rated value3 A
● at 500 V rated value2 A
● at 690 V rated value1 A
operational current at DC-12-
operational current at DC-13-
● at 24 V rated value10 A
● at 48 V rated value2 A
● at 60 V rated value2 A
● at 110 V rated value1 A
● at 125 V rated value0.9 A
● at 220 V rated value0.3 A
contact reliability of auxiliary contacts1 faulty switching per 100 million (17 V, 1 mA)
full-load current (FLA) for 3-phase AC motor-
● at 480 V rated value27 A
● at 600 V rated value27 A
yielded mechanical performance [hp]-
● for single-phase AC motor-
— at 110/120 V rated value2 hp
— at 230 V rated value5 hp
● for 3-phase AC motor-
— at 200/208 V rated value10 hp
— at 220/230 V rated value10 hp
— at 460/480 V rated value20 hp
— at 575/600 V rated value25 hp
contact rating of auxiliary contacts according to ULA600 / P600
design of the fuse link-
● for short-circuit protection of the main circuit-
— with type of coordination 1 requiredgG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)
— with type of assignment 2 requiredgG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)
● for short-circuit protection of the auxiliary switch requiredgG: 10 A (500 V, 1 kA)
mounting position+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface
fastening methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
● side-by-side mountingYes
required spacing-
● with side-by-side mounting-
● for grounded parts-
● for live parts-
— forwards10 mm
— upwards10 mm
— downwards10 mm
— at the side6 mm
type of electrical connection-
● for main current circuitscrew-type terminals
● for auxiliary and control circuitscrew-type terminals
● at contactor for auxiliary contactsScrew-type terminals
● of magnet coilScrew-type terminals
— solid2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
● at AWG cables for main contacts2x (16 ... 12), 2x (14 ... 8)
connectable conductor cross-section for main contacts-
● solid1 ... 10 mm²
● stranded1 ... 10 mm²
connectable conductor cross-section for auxiliary contacts-
● solid or stranded0.5 ... 2.5 mm²
● finely stranded with core end processing0.5 ... 2.5 mm²
type of connectable conductor cross-sections-
— solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
— finely stranded with core end processing2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
● at AWG cables for auxiliary contacts2x (20 ... 16), 2x (18 ... 14)
AWG number as coded connectable conductor cross section-
● for main contacts16 ... 8
● for auxiliary contacts20 ... 14
B10 value with high demand rate acc. to SN 31920450 000
proportion of dangerous failures-
● with low demand rate acc. to SN 3192040 %
● with high demand rate acc. to SN 3192073 %
failure rate [FIT] with low demand rate acc. to SN 31920100 FIT
T1 value for proof test interval or service life acc. to IEC 6150820 y
protection class IP on the front acc. to IEC 60529IP20
touch protection on the front acc. to IEC 60529finger-safe, for vertical contact from the front
suitability for use-
● safety-related switching OFFYes
Test CertificatesMarine / Shipping
last modified:11/27/2021
Weight0.608 kg
Dimensions54.00 × 92.00 × 115.50 mm

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