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    • 3RW50 soft starters

    Категории
    Последнее обновление цен: 5 августа 2026

    Обзор

    SIRIUS 3RW50 Basic Performance soft starters are the compact solution for standard applications. They have 2-phase motor control and cover the performance range from 75 to 315 kW (at 400 V).

    Optional HMI modules for installation in the control cabinet door, laterally mountable communications modules (PROFINET, PROFIBUS, EtherNet/IP and Modbus) and either an analog output or thermistor motor protection ensure maximum flexibility.

    With their modern hybrid switching technology, the SIRIUS 3RW50 soft starters offer efficient switching for long-term, energy-saving use.

    More information

    Homepage, see www.siemens.com/sirius-soft-starter

    Simulation Tool for Soft Starters (STS), see 

    SiePortal, see www.siemens.com/product_catalog_siep?3RW50

    SIRIUS Soft Starter ES (TIA Portal) for diagnostics, see 

    TIA Selection Tool Cloud (TST Cloud)

    see  www.siemens.com/tstcloud/?node=3rw50

    Decision support for motor start – Starting and operating three-phase asynchronous motors efficiently, see www.siemens.com/motorstart-guide

    Topic page, see 

    Conversion tool, see www.siemens.com/conversion-tool

    SIRIUS 3RW50 soft starters device family

    SIRIUS 3RW50 Basic Performance soft starter with accessories, for expansion with HMI module or communications module

    Особенности

    Product characteristics/function

    Performance features/benefits

    Hybrid switching technology and 2-phase motor control

    Minimum power loss and optimized motor control by avoiding DC components

    Small and compact design

    Space-saving, clearly arranged control panel layout

    TIA integration – communications modules and HMI modules optional

    Efficient configuration and maximum flexibility in automation engineering

    Motor overload and intrinsic device protection without additional wiring

    Adjustable trip classes, integrated diagnostics functions

    Soft Torque

    Reduced mechanical loading and optimum pump stop

    Parameterization using potentiometers

    Simple and fast commissioning

    Wide range for control supply and main voltage

    Low variance, high system availability even with weak supply networks

    Certified according to ATEX/IECEx directive

    Suitable for the starting of explosion-proof motors with "increased safety" type of protection

    Технические данные

    More information

    Technical specifications, see 

    FAQs, see 

    Equipment Manual, see 

    Simulation Tool for Soft Starters (STS), see 

    Type

    3RW5055

    3RW5056

    Rated operational current Ie

    A

    143

    171

    Power electronics

    Load rating rated operational current Ie

    IEC + UL/CSA individual mounting at 40/50/60 °C, AC‑53a

    A

    143/128/118

    171/153/141

    Permissible rated motor current and starts/h

    Normal starting (CLASS 10A)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    143/128/118

    171/153/141
    • 300% IM
    • Start-up time 5 s

    1/h

    43

    43
    • Start-up time 10 s

    1/h

    18

    18
    • 350% IM
    • Start-up time 5 s

    1/h

    28

    28
    • Start-up time 10 s

    1/h

    10

    9

    Normal starting (CLASS 10E)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    143/128/118

    171/153/141
    • 300% IM
    • Start-up time 10 s

    1/h

    21

    21
    • Start-up time 20 s

    1/h

    8

    8
    • 350% IM
    • Start-up time 10 s

    1/h

    12

    9
    • Start-up time 20 s

    1/h

    4

    --

    Heavy starting (CLASS 20E)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    108/98/88

    135/123/111
    • 300% IM
    • Start-up time 20 s

    1/h

    10

    10
    • Start-up time 40 s

    1/h

    4

    4
    • 350% IM
    • Start-up time 20 s

    1/h

    7

    7
    • Start-up time 40 s

    1/h

    2.5

    2.5

    Adjustable rated motor current IM
    • Minimum/maximum

    A

    68/143

    81/117

    Type

    3RW5072

    3RW5073

    3RW5074

    3RW5075

    3RW5076

    3RW5077

    Rated operational current Ie

    A

    210

    250

    315

    370

    470

    570

    Power electronics

    Load rating rated operational current Ie

    IEC + UL/CSA individual mounting at 40/50/60 °C, AC‑53a

    A

    210/186/170

    250/220/200

    315/279/255

    370/328/300

    470/416/380

    570/504/460

    Permissible rated motor current and starts/h

    Normal starting (CLASS 10A)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    210/186/170

    250/220/200

    315/279/255

    370/328/300

    470/416/380

    570/504/460
    • 300% IM
    • Start-up time 5 s

    1/h

    43

    43

    43

    43

    43

    28
    • Start-up time 10 s

    1/h

    18

    18

    18

    18

    18

    11
    • 350% IM
    • Start-up time 5 s

    1/h

    28

    28

    28

    28

    28

    16
    • Start-up time 10 s

    1/h

    8

    10

    10

    10

    10

    4

    Normal starting (CLASS 10E)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    210/186/170

    250/220/200

    315/279/255

    370/328/300

    470/416/380

    570/504/460
    • 300% IM
    • Start-up time 10 s

    1/h

    21

    21

    21

    21

    20

    21
    • Start-up time 20 s

    1/h

    8

    8

    8

    8

    7

    8
    • 350% IM
    • Start-up time 10 s

    1/h

    8

    13

    12

    13

    12

    13
    • Start-up time 20 s

    1/h

    --

    4

    4

    4

    2

    4

    Heavy starting (CLASS 20E)

    Rated motor current IM; Tu = 40/50/60 °C
    ON period = 70%; motor protection activated

    A

    162/146/130

    200/180/160

    219/195/171

    258/230/202

    272/254/218

    284/262/240
    • 300% IM
    • Start-up time 20 s

    1/h

    10

    10

    10

    10

    10

    10
    • Start-up time 40 s

    1/h

    4

    4

    4

    4

    4

    4
    • 350% IM
    • Start-up time 20 s

    1/h

    7

    7

    7

    7

    7

    7
    • Start-up time 40 s

    1/h

    2.5

    2.5

    2.5

    2.5

    2.5

    2.5

    Adjustable rated motor current IM
    • Minimum/maximum

    A

    90/210

    100/250

    135/315

    160/370

    200/470

    240/570

    Motor feeders according to IEC with 3VA motor starter protectors/circuit breakers (without semiconductor protection)

    Type of coordination "1", CLASS 10,
    short-circuit breaking capacity Iq in kA, see table

    Note:

    For general recommendations on the setup of motor feeders with soft starters, see SIRIUS 3RW soft starters → Overview → Motor feeders with soft starters.

    Soft starters

    Motor starter protectors

    for 400 V systems

    for 500 V systems

    Q11

    Q1

    Iq

    Q1

    Iq

    Type

    Type

    kA

    Type

    kA

    Type of coordination "1"

    Standard (inline) circuit

    3RW5055

    3VA2220-7MN32-0AA0

    20

    3VA2220-7MN32-0AA0

    20

    3RW5056

    3VA2220-7MN32-0AA0

    20

    3VA2220-7MN32-0AA0

    20

    3RW5072

    3VA2440-7MN32-0AA0

    65

    3VA2440-7MN32-0AA0

    65

    3RW5073

    3VA2440-7MN32-0AA0

    65

    3VA2440-7MN32-0AA0

    65

    3RW5074

    3VA2440-7MN32-0AA0

    65

    3VA2440-7MN32-0AA0

    65

    3RW5075

    3VA2580-6HN32-0AA0

    65

    3VA2580-6HN32-0AA0

    65

    3RW5076

    3VA2580-6HN32-0AA0

    65

    3VA2580-6HN32-0AA0

    65

    3RW5077

    3VA2580-6HN32-0AA0

    65

    3VA2580-6HN32-0AA0

    65

    Note:

    The service factor or measurement inaccuracies have been taken into account, for example, for the selection of the specified motor starter protectors/circuit breakers; the specified short-circuit breaking capacities Iq in kA are covered by combination tests. Smaller motor starter protectors/circuit breakers from the same series can be used at any time as smaller ones trip more quickly in the event of a short circuit (unchanged short-circuit breaking capacity) and thus protect the soft starter in any case. The dimensioning of the short-circuit components must match the connected three-phase motor, the short-circuit and overload requirements of the application, and the line protection for the cables used.

    Motor feeders according to IEC with 3NA3 fuses

    gG class full-range fuses for cable and line protection
    according to IEC 60269‑2, without semiconductor protection

    Type of coordination "1",
    short-circuit breaking capacity Iq = 65 kA

    Note:

    For general recommendations on the setup of motor feeders with soft starters, see SIRIUS 3RW soft starters → Overview → Motor feeders with soft starters.

    Soft starters

    gG class fuse

    Line contactor (optional)

    for systems
    up to 600 V

    for systems
    up to 480 V

    for systems
    up to 600 V

    Q11

    F1

    Q21

    Q21

    Type

    Type

    Type

    Type

    Type of coordination "1"

    Standard (inline) circuit

    3RW5055

    3NA3244-6

    3RT1055

    3RT1055

    3RW5056

    3NA3244-6

    3RT1056

    3RT1064

    3RW5072

    2 x 3NA3354-6

    3RT1064

    3RT1064

    3RW5073

    2 x 3NA3354-6

    3RT1065

    3RT1065

    3RW5074

    2 x 3NA3365-6

    3RT1075

    3RT1075

    3RW5075

    2 x 3NA3365-6

    3RT1075

    3RT1075

    3RW5076

    2 x 3NA3365-6

    3RT1076

    3RT1076

    3RW5077

    2 x 3NA3365-6

    3TF68

    3TF68

    Note:

    The specified short-circuit breaking capacities Iq in kA are covered by combination tests. Smaller fuses than those specified can be used at any time as smaller ones trip more quickly in the event of a short circuit (unchanged short-circuit breaking capacity) and thus protect the soft starter in any case. The dimensioning of the short-circuit components must, however, be suitable for the connected three-phase motor and the line protection for the cables used.

    Motor feeders according to IEC with 3NE1 SITOR fuses

    gR/gS class full-range fuses for semiconductor protection,
    cable and line protection (gS)

    Type of coordination "2",
    short-circuit breaking capacity Iq = 65 kA

    Note:

    For general recommendations on the setup of motor feeders with soft starters, see SIRIUS 3RW soft starters → Overview → Motor feeders with soft starters.

    Soft starters

    gR/gS class fuse

    Line contactor (optional)

    for systems
    up to 600 V

    for systems
    up to 480 V

    for systems
    up to 600 V

    Q11

    F'1

    Q21

    Q21

    Type

    Type

    Type

    Type

    Type of coordination "2"

    Standard (inline) circuit

    3RW5055

    3NE1227-0

    3RT1055

    3RT1055

    3RW5056

    3NE1230-0

    3RT1056

    3RT1064

    3RW5072

    3NE1230-2

    3RT1064

    3RT1064

    3RW5073

    3NE1331-0

    3RT1065

    3RT1065

    3RW5074

    3NE1333-2

    3RT1075

    3RT1075

    3RW5075

    3NE1334-2

    3RT1075

    3RT1075

    3RW5076

    3NE1436-2

    3RT1076

    3RT1076

    3RW5077

    3NE1437-2

    3TF68

    3TF68

    Note:

    The specified short-circuit breaking capacities Iq in kA are covered by combination tests. Smaller fuses than those specified can be used at any time as smaller ones trip more quickly in the event of a short circuit (unchanged short-circuit breaking capacity) and thus protect the soft starter in any case. The dimensioning of the short-circuit components must, however, be suitable for the connected three-phase motor and the line protection for the cables used.

    Motor feeders according to IEC with 3NE3 fuses

    aR class partial-range fuses for semiconductor protection

    Type of coordination "2",
    short-circuit breaking capacity Iq = 65 kA

    Note:

    For general recommendations on the setup of motor feeders with soft starters, see SIRIUS 3RW soft starters → Overview → Motor feeders with soft starters.

    Soft starters

    gG class fuse

    aR class fuse

    Line contactor (optional)

    for systems
    up to 600 V

    for systems
    up to 600 V

    for systems
    up to 480 V

    for systems
    up to 600 V

    Q11

    F1

    F3

    Q21

    Q21

    Type

    Type

    Type

    Type

    Type

    Type of coordination "2"

    Standard (inline) circuit

    3RW5055

    3NA3244-6

    3NE3334-0B

    3RT1055

    3RT1055

    3RW5056

    3NA3244-6

    3NE3335

    3RT1056

    3RT1064

    3RW5072

    2 x 3NA3354-6

    3NE3333

    3RT1064

    3RT1064

    3RW5073

    2 x 3NA3354-6

    3NE3335

    3RT1065

    3RT1065

    3RW5074

    2 x 3NA3365-6

    3NE3335

    3RT1075

    3RT1075

    3RW5075

    2 x 3NA3365-6

    3NE3336

    3RT1075

    3RT1075

    3RW5076

    2 x 3NA3365-6

    3NE3340-8

    3RT1076

    3RT1076

    3RW5077

    2 x 3NA3365-6

    3NE3340-8

    3TF68

    3TF68

    Note:

    The specified short-circuit breaking capacities Iq in kA are covered by combination tests. Smaller fuses than those specified can be used at any time as smaller ones trip more quickly in the event of a short circuit (unchanged short-circuit breaking capacity) and thus protect the soft starter in any case. The dimensioning of the short-circuit components must, however, be suitable for the connected three-phase motor and the line protection for the cables used.

    For CLASS 10 applications, as an alternative to the gG class full-range fuses for cable and line protection 3NA3 (F1), 3VA motor starter protectors/circuit breakers can also be used, possibly with reduced short-circuit breaking capacity, see Table "Motor feeders according to IEC with 3VA motor starter protectors (without semiconductor protection)" In these cases, optional line contactors can be dispensed with.

    Article number

    3RW5055
    3RW5056

    3RW5072
    3RW5073
    3RW5074
    3RW5075
    3RW5076
    3RW5077

    Installation/ mounting/ dimensions

    Width x Height x Depth
    post

    mm

    120 × 198 × 249

    160 × 230 × 282

    fastening method

    screw fixing

    mounting position

    with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back

    required spacing with side-by-side mounting

    • ● upwards

    mm

    100

    • ● at the side

    mm

    5

    • ● downwards

    mm

    75

    installation altitude at height above sea level maximum 1)

    m

    5 000

    protection class IP on the front according to IEC 60529

    IP00; IP20 with cover

    touch protection on the front according to IEC 60529

    finger-safe, for vertical contact from the front with cover

    Ambient conditions

    ambient temperature

    • ● during operation 2)

    °C

    -25 ... +60

    • ● during storage and transport

    °C

    -40 ... +80

    environmental category according to IEC 60721

    • ● during operation

    3K6 (no ice formation, only occasional condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6

    • ● during storage

    1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4

    • ● during transport

    2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)
    1) Derating as of 1000 m, see catalog
    2) Please observe derating at temperatures of 40 °C or above

    Article number

    3RW50..-..B0.

    3RW50..-..B1.

    Control circuit/ Control

    control supply voltage

    • ● at AC/DC

    V

    24/24

    --/--

    • ● at AC

    --

    110 ... 250

    Relative negative tolerance/Relative positive tolerance at AC

    %

    -20/20

    -15/10

    Relative negative tolerance/Relative positive tolerance at DC

    %

    -20/20

    --/--

    control supply voltage frequency

    Hz

    50 ... 60

    • ● Relative negative tolerance/Relative positive tolerance

    -10/10

    design of the overvoltage protection

    Varistor

    design of short-circuit protection for control circuit 1)

    4 A gG fuse (Icu=1 kA), 6 A quick-acting fuse (Icu=1 kA), C1 miniature circuit breaker (Icu= 600 A), C6 miniature circuit breaker (Icu= 300 A)
    1) Is not part of scope of supply

    Article number

    3RW505.-..B.4

    3RW507.-..B.4

    3RW505.-..B.5

    3RW507.-..B.5

    Power Electronics

    operating voltage

    V

    200 ... 480

    200 ... 600

    • ● Relative negative tolerance/Relative positive tolerance

    -15/10

    Operating frequency

    Hz

    50 ... 60

    • ● Relative negative tolerance/Relative positive tolerance

    -10/10

    blocking voltage of the thyristor maximum

    V

    1 400

    1 600

    1 800

    1 600

    minimum load [%] 1)

    %

    15

    wire length between soft starter and motor maximum

    m

    800
    1) Relative to smallest settable Ie

    Ответственный редактор / Инженер

    Директор «Би Энд Би Инжиниринг»
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