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Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal
Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal
Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal
Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal
Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal
Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal

SIEMENS

Siemens 3RT2018-2BB42 Power Contactor 3-Pole, 16A, 7.5 kW, 24V DC, S00, Spring-Loaded Terminal Original Brand New

Model / SKU3RT2018-2BB42

Power Contactor Rated 16 A / 7.5 kW (400 V), 3-pole. Features a 24 V DC coil, 1 NC auxiliary contact, and secure spring-loaded terminals. Size S00.

Original price was: $155.01.Current price is: $86.71.
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  • ConditionOriginal Brand New
  • Warranty12 months
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Description

Overview

The Siemens 3RT2018-2BB42 Power Contactor is engineered for reliable and efficient motor switching across industrial automation systems. Designed for AC-3e/AC-3 applications, this high-performance 3-pole contactor supports 16 A and 7.5 kW at 400 V, making it ideal for motor control, power distribution, and automation panels.

Featuring a 24 V DC coil, 1 NC auxiliary contact, and spring-loaded terminals, it ensures fast installation, secure wiring, and low maintenance operation. Compact and lightweight in Siemens size S00, this contactor fits seamlessly into control cabinets while maintaining top-tier switching performance and durability.

Benefit

  • High Switching Performance: Optimized for AC-3e/AC-3 applications up to 7.5 kW and 16 A, ensuring stable motor control.

  • Compact S00 Design: Saves panel space and integrates easily into industrial systems.

  • Fast & Safe Wiring: Spring-loaded terminals reduce installation time and prevent loose connections.

  • Reliable Operation: Siemens engineering provides long lifecycle and consistent performance.

  • Energy Efficient: 24 V DC coil delivers low power consumption and stable electromagnetic control.

Function

  • Motor switching and control in industrial automation systems

  • Control circuit integration using built-in auxiliary contact

  • Designed for demanding AC-3e/AC-3 utilization categories

Technical Features

  • Rated Current: 16 A

  • Rated Power: 7.5 kW at 400 V

  • Poles: 3-pole (main contacts)

  • Coil Voltage: 24 V DC

  • Auxiliary Contact: 1 NC

  • Terminal Type: Spring-loaded

  • Frame Size: S00

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Datasheet in PDF

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Specifications

SKU / Model3RT2018-2BB42
BrandSIEMENS
product brand nameSIRIUS
product designationPower contactor
product type designation3RT2
size of contactorS00
product extension-
● function module for communicationNo
● auxiliary switchYes
power loss [W] for rated value of the current at AC in hot operating state6.6 W
● per pole2.2 W
power loss [W] for rated value of the current without load current share typical4 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 typical30 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
operational current-
● at AC-1 at 400 V at ambient temperature 40 °C rated value22 A
● at AC-1-
— up to 690 V at ambient temperature 40 °C rated value22 A
— up to 690 V at ambient temperature 60 °C rated value20 A
● at AC-4 at 400 V rated value11.5 A
● at AC-5a up to 690 V rated value19.4 A
● at AC-5b up to 400 V rated value13.2 A
— up to 230 V for current peak value n=20 rated value9.6 A
— up to 400 V for current peak value n=20 rated value9.6 A
— up to 500 V for current peak value n=20 rated value9.6 A
— up to 690 V for current peak value n=20 rated value8.9 A
● at AC-6a-
— up to 230 V for current peak value n=30 rated value6.6 A
— up to 400 V for current peak value n=30 rated value6.4 A
— up to 500 V for current peak value n=30 rated value6.4 A
— up to 690 V for current peak value n=30 rated value6.4 A
minimum cross-section in main circuit at maximum AC-1 rated value4 mm²
operational current for approx. 200000 operating cycles at AC-4-
operating power-
● at AC-3-
— at 400 V rated value7.5 kW
— at 500 V rated value7.5 kW
— at 690 V rated value7.5 kW
operating power for approx. 200000 operating cycles at AC-4-
● up to 230 V for current peak value n=20 rated value3.8 kV·A
● up to 400 V for current peak value n=20 rated value6.6 kV·A
● up to 500 V for current peak value n=20 rated value8.3 kV·A
● up to 690 V for current peak value n=20 rated value10.6 kV·A
operating apparent power at AC-6a-
● up to 230 V for current peak value n=30 rated value2.5 kV·A
● up to 400 V for current peak value n=30 rated value4.4 kV·A
● up to 500 V for current peak value n=30 rated value5.5 kV·A
● up to 690 V for current peak value n=30 rated value7.6 kV·A
short-time withstand current in cold operating state up to 40 °C-
● limited to 1 s switching at zero current maximum300 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 5 s switching at zero current maximum169 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 10 s switching at zero current maximum128 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 30 s switching at zero current maximum92 A; Use minimum cross-section acc. to AC-1 rated value
● limited to 60 s switching at zero current maximum74 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 DC4 W
holding power of magnet coil at DC4 W
closing delay-
opening delay-
● at DC7 ... 13 ms
arcing time10 ... 15 ms
control version of the switch operating mechanismStandard A1 - A2
number of NC 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 value14 A
● at 600 V rated value11 A
yielded mechanical performance [hp]-
● for single-phase AC motor-
— at 110/120 V rated value1 hp
— at 230 V rated value2 hp
● for 3-phase AC motor-
— at 200/208 V rated value3 hp
— at 220/230 V rated value5 hp
— at 460/480 V rated value10 hp
— at 575/600 V rated value10 hp
contact rating of auxiliary contacts according to ULA600 / Q600
design of the fuse link-
● for short-circuit protection of the main circuit-
— with type of coordination 1 requiredgG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (415V,80kA)
— with type of assignment 2 requiredgG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (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 circuitspring-loaded terminals
● for auxiliary and control circuitspring-loaded terminals
● at contactor for auxiliary contactsSpring-type terminals
● of magnet coilSpring-type terminals
— solid2x (0.5 ... 4 mm²)
● at AWG cables for main contacts2x (20 ... 12)
connectable conductor cross-section for main contacts-
● solid0.5 ... 4 mm²
● stranded0.5 ... 4 mm²
connectable conductor cross-section for auxiliary contacts-
● solid or stranded0.5 ... 4 mm²
● finely stranded with core end processing0.5 ... 2.5 mm²
● finely stranded without core end processing0.5 ... 2.5 mm²
type of connectable conductor cross-sections-
— solid or stranded2x (0,5 ... 4 mm²)
— finely stranded with core end processing2x (0.5 ... 2.5 mm²)
— finely stranded without core end processing2x (0.5 ... 2.5 mm²)
● at AWG cables for auxiliary contacts2x (20 ... 12)
AWG number as coded connectable conductor cross section-
● for main contacts20 ... 12
● for auxiliary contacts20 ... 12
B10 value with high demand rate acc. to SN 319201 000 000
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
last modified:11/17/2021
Weight0.316 kg
Dimensions50.00 × 73.50 × 77.50 mm

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