How to Select and Size a Soft Starter for a Motor
How to size a soft starter correctly by full-load current, IEC 60947-4-2 duty class, starting torque against the load, control method, wiring topology and...
- Part number
- 3RW5548-6HF14
- Model no
- 3RW55
Siemens 3RW5548-6HF14 3RW5 570A 480V Soft Starter
Other ratings in 3RW5
All 23 ratings ↓
| Motor power kW | Rated current In (A) | Part number | Stock | Price |
|---|---|---|---|---|
| 370 | 3RW5546-6HF14 | On request | $9,480.67 | |
| 470 | 3RW5547-6HF14 | On request | $11,171.42 | |
| 570 | 3RW5548-6HF14This part | On request | $12,560.32 | |
| 630 | 3RW5552-6HA14 | Low stock | $10,435.11 | |
| 720 | 3RW5553-6HA14 | Low stock | $11,579.30 |
Description
About the 3RW55
About the 3RW55
The Siemens 3RW5548-6HF14 is a soft starter from the SENTRON/SIRIUS 3RW5 series. SIRIUS soft starter 200-480 V 570 A, 110-250 V AC, Screw terminals Fail-safe. Supplied by Stoklink for industrial and commercial low-voltage applications.
Certifications & Standards
- IEC 61557-12
- IEC 60947-4
Applications & Use Cases
The Siemens 3RW5548-6HF14 is used in industrial control panels, distribution boards and automation systems. As part of the Siemens 3RW5 range it integrates with compatible SENTRON/SIRIUS components for a coordinated low-voltage installation. Genuine Siemens product supplied by Stoklink with fast dispatch from Türkiye.
Specification
Full specification
General 15
| product brand name | SIRIUS |
|---|---|
| product category | Hybrid switching devices |
| product designation | Failsafe soft starters |
| product type designation | 3RW55 |
| manufacturer's article number: of high feature HMI module usable | 3RW5980-0HF00 |
| manufacturer's article number: of communication module PROFINET standard usable | 3RW5980-0CS00 |
| manufacturer's article number: of communication module PROFIBUS usable | 3RW5980-0CP00 |
| manufacturer's article number: of communication module Modbus TCP usable | 3RW5980-0CT00 |
| manufacturer's article number: of communication module Ethernet/IP | 3RW5980-0CE00 |
| manufacturer's article number: of circuit breaker usable at 400 V | 3VA2580-6HN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10 |
| manufacturer's article number: of circuit breaker usable at 500 V | 3VA2580-6HN32-0AA0; Type of coordination 1, Iq = 65 kA, CLASS 10 |
| manufacturer's article number: of the gG fuse usable up to 690 V | 2x3NA3365-6; Type of coordination 1, Iq = 65 kA |
| manufacturer's article number: of the gG fuse usable at inside-delta circuit up to 500 V | 2x3NA3365-6; Type of coordination 1, Iq = 65 kA |
| manufacturer's article number: of full range R fuse link for semiconductor protection usable up to 690 V | 3NE1437-2; Type of coordination 2, Iq = 65 kA |
| manufacturer's article number: of back-up R fuse link for semiconductor protection usable up to 690 V | 3NC3342-1U; Type of coordination 2, Iq = 65 kA |
General technical data 78
| starting voltage [%] | 20 ... 100 % |
|---|---|
| stopping voltage [%] | 50 %; non-adjustable |
| start-up ramp time of soft starter | 0 ... 360 s |
| ramp-down time of soft starter | 0 ... 360 s |
| start torque [%] | 10 ... 100 % |
| stopping torque [%] | 10 ... 100 % |
| torque limitation [%] | 20 ... 200 % |
| current limiting value [%] adjustable | 125 ... 800 % |
| breakaway voltage [%] adjustable | 40 ... 100 % |
| breakaway time adjustable | 0 ... 2 s |
| number of parameter sets | 3 |
| accuracy class | 5 (based on IEC 61557-12) |
| certificate of suitability: CE marking | Yes |
| certificate of suitability: UL approval | Yes |
| certificate of suitability: CSA approval | Yes |
| product component: HMI-High Feature | Yes |
| product component: is supported HMI-High Feature | Yes |
| product feature integrated bypass contact system | Yes |
| number of controlled phases | 3 |
| current unbalance limiting value [%] | 10 ... 60 % |
| ground-fault monitoring limiting value [%] | 10 ... 95 % |
| buffering time in the event of power failure: for main current circuit | 100 ms |
| buffering time in the event of power failure: for control circuit | 100 ms |
| idle time adjustable | 0 ... 255 s |
| insulation voltage rated value | 480 V |
| degree of pollution | 3, acc. to IEC 60947-4-2 |
| impulse voltage rated value | 6 kV |
| blocking voltage of the thyristor maximum | 1 400 V |
| service factor | 1.15 |
| surge voltage resistance rated value | 6 kV |
| maximum permissible voltage for protective separation: between main and auxiliary circuit | 480 V; does not apply for thermistor connection |
| shock resistance | 15 g / 11 ms, from 6 g / 11 ms with potential contact lifting |
| vibration resistance | 15 mm up to 6 Hz; 2 g up to 500 Hz |
| recovery time after overload trip adjustable | 60 ... 1 800 s |
| utilization category according to IEC 60947-4-2 | AC 53a |
| reference code according to IEC 81346-2 | Q |
| Substance Prohibitance (day/month/year) | 11/22/2019 |
| SVHC substance name | Lead CAS-No. 7439-92-1 Lead monoxide (lead oxide) CAS-No. 1317-36-8 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one CAS-No. 71868- 10-5 Melamine CAS-No. 108-78-1 6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol CAS-No. 119-47-1 Dibutylbis(pentane-2,4-dionato-O,O')tin CAS-No. 22673-19-4 |
| product function: ramp-up (soft starting) | Yes |
| product function: soft stopping | Yes |
| product function: breakaway pulse | Yes |
| product function: adjustable current limitation | Yes |
| product function: creep speed in both directions of rotation | Yes |
| product function: pump stop | Yes |
| product function: DC braking | Yes |
| product function: motor heating | Yes |
| product function: min/max pointer | Yes |
| product function: trace function | Yes |
| product function: intrinsic device protection | Yes |
| product function: motor overload protection | Yes; Full motor protection (thermistor motor protection and electronic motor overload protection) / When using the motor overload protection according to ATEX, an upstream contactor is required in inside-delta circuit. |
| product function: evaluation of thermistor motor protection | Yes; Type A PTC or Klixon / Thermoclick |
| product function: inside-delta circuit | Yes |
| product function: auto-RESET | Yes |
| product function: manual RESET | Yes |
| product function: remote reset | Yes |
| product function: communication function | Yes |
| product function: operating measured value display | Yes |
| product function: event list | Yes |
| product function: error logbook | Yes |
| product function: via software parameterizable | Yes |
| product function: via software configurable | Yes |
| product function: screw terminal | Yes |
| product function: spring-loaded terminal | No |
| product function: PROFIenergy | Yes; in connection with the PROFINET Standard and PROFINET High-Feature communication modules |
| product function: firmware update | Yes |
| product function: removable terminal for control circuit | Yes |
| product function: voltage ramp | Yes |
| product function: torque control | Yes |
| product function: combined braking | Yes |
| product function: analog output | Yes; 4 ... 20 mA (default) / 0 ... 10 V |
| product function: programmable control inputs/outputs | Yes |
| product function: condition monitoring | Yes |
| product function: automatic parameterisation | Yes |
| product function: application wizards | Yes |
| product function: alternative stopping mode | Yes |
| product function: emergency operation mode | Yes |
| product function: reversing operation | Yes |
| product function: soft starting at heavy starting conditions | Yes |
Power Electronics 29
| operational current: at 40 °C rated value | 570 A |
|---|---|
| operational current: at 40 °C rated value minimum | 114 A |
| operational current: at 50 °C rated value | 504 A |
| operational current: at 60 °C rated value | 460 A |
| operational current at inside-delta circuit: at 40 °C rated value | 987 A |
| operational current at inside-delta circuit: at 50 °C rated value | 873 A |
| operational current at inside-delta circuit: at 60 °C rated value | 796 A |
| operating voltage: rated value | 200 ... 480 V |
| operating voltage: at inside-delta circuit rated value | 200 ... 480 V |
| relative negative tolerance of the operating voltage | -15 % |
| relative positive tolerance of the operating voltage | 10 % |
| relative negative tolerance of the operating voltage at inside-delta circuit | -15 % |
| relative positive tolerance of the operating voltage at inside-delta circuit | 10 % |
| operating power for 3-phase motors: at 230 V at 40 °C rated value | 160 kW |
| operating power for 3-phase motors: at 230 V at inside-delta circuit at 40 °C rated value | 315 kW |
| operating power for 3-phase motors: at 400 V at 40 °C rated value | 315 kW |
| operating power for 3-phase motors: at 400 V at inside-delta circuit at 40 °C rated value | 560 kW |
| Operating frequency 1 rated value | 50 Hz |
| Operating frequency 2 rated value | 60 Hz |
| relative negative tolerance of the operating frequency | -10 % |
| relative positive tolerance of the operating frequency | 10 % |
| minimum load [%] | 10 %; Relative to set Ie |
| power loss [W] for rated value of the current at AC: at 40 °C after startup | 171 W |
| power loss [W] for rated value of the current at AC: at 50 °C after startup | 151 W |
| power loss [W] for rated value of the current at AC: at 60 °C after startup | 141 W |
| power loss [W] at AC at current limitation 350%: at 40 °C during startup | 10 229 W |
| power loss [W] at AC at current limitation 350%: at 50 °C during startup | 8 488 W |
| power loss [W] at AC at current limitation 350%: at 60 °C during startup | 7 651 W |
| type of the motor protection | Electronic, tripping in the event of thermal overload of the motor |
Show all 247 specifications ↓ Show less ↑125 more values in Identification, Control circuit/ Control, Inputs/ Outputs, Response times, Installation/ mounting/ dimensions, Connections/ Terminals, Ambient conditions, Electromagnetic compatibility, Communication/ Protocol, UL/CSA ratings, Safety related data, IEC 62061, ISO 13849, IEC 61508, Electrical Safety, ATEX, Approvals Certificates, Logistics.
Identification 10
| Part number | 3RW5548-6HF14 |
|---|---|
| Type designation | 3RW55 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Active, in production |
| EAN | 4047621042244 |
| ETIM class | EC000640 |
| eCl@ss | 27370907 |
Control circuit/ Control 15
| type of voltage of the control supply voltage | AC |
|---|---|
| control supply voltage at AC: at 50 Hz | 110 ... 250 V |
| control supply voltage at AC: at 60 Hz | 110 ... 250 V |
| relative negative tolerance of the control supply voltage at AC at 50 Hz | -15 % |
| relative positive tolerance of the control supply voltage at AC at 50 Hz | 10 % |
| control supply voltage frequency | 50 ... 60 Hz |
| relative negative tolerance of the control supply voltage frequency | -10 % |
| relative positive tolerance of the control supply voltage frequency | 10 % |
| control supply current in standby mode rated value | 100 mA |
| holding current in bypass operation rated value | 150 mA |
| inrush current by closing the bypass contacts maximum | 0.87 A |
| inrush current peak at application of control supply voltage maximum | 43 A |
| duration of inrush current peak at application of control supply voltage | 1.6 ms |
| design of the overvoltage protection | Varistor |
| design of short-circuit protection for control circuit | 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); Is not part of scope of supply |
Inputs/ Outputs 11
| number of digital inputs | 4 |
|---|---|
| with fail-safe | 1 |
| parameterizable | 4 |
| number of digital outputs | 3 |
| Number of digital outputs with fail-safe | 1 |
| number of digital outputs parameterizable | 2 |
| number of digital outputs not parameterizable | 1 |
| digital output version | 2 normally-open contacts (NO) / 1 normally-closed contact (NC) / 1 changeover contact (CO) |
| number of analog outputs | 1 |
| switching capacity current of the relay outputs: at AC-15 at 250 V rated value | 3 A |
| switching capacity current of the relay outputs: at DC-13 at 24 V rated value | 1 A |
Response times 1
| OFF-delay time with safety-related request when switched off via control inputs maximum | 100 ms |
|---|
Installation/ mounting/ dimensions 11
| mounting position | Vertical (can be rotated +/- 90° and tilted forward or backward +/- 22.5°) |
|---|---|
| fastening method | screw fixing |
| height | 393 mm |
| width | 210 mm |
| depth | 203 mm |
| required spacing with side-by-side mounting: forwards | 10 mm |
| required spacing with side-by-side mounting: backwards | 0 mm |
| required spacing with side-by-side mounting: upwards | 100 mm |
| required spacing with side-by-side mounting: downwards | 75 mm |
| required spacing with side-by-side mounting: at the side | 5 mm |
| weight without packaging | 10.9 kg |
Connections/ Terminals 13
| type of electrical connection: for main current circuit | busbar connection |
|---|---|
| type of electrical connection: for control circuit | screw-type terminals |
| width of connection bar maximum | 45 mm |
| wire length for thermistor connection: with conductor cross-section = 0.5 mm2 maximum | 50 m |
| type of connectable conductor cross-sections: for DIN cable lug for main contacts stranded | 2x (50 ... 240 mm2) |
| type of connectable conductor cross-sections: for control circuit solid | 1x (0.5 ... 4.0 mm2), 2x (0.5 ... 2.5 mm2) |
| type of connectable conductor cross-sections: for AWG cables for control circuit solid | 1x (20 ... 12), 2x (20 ... 14) |
| wire length: between soft starter and motor maximum | 800 m |
| wire length: at the digital inputs at DC maximum | 1 000 m |
| tightening torque: for main contacts with screw-type terminals | 14 ... 24 N·m |
| tightening torque: for auxiliary and control contacts with screw-type terminals | 0.8 ... 1.2 N·m |
| tightening torque [lbf·in]: for main contacts with screw-type terminals | 124 ... 210 lbf·in |
| tightening torque [lbf·in]: for auxiliary and control contacts with screw-type terminals | 7 ... 10.3 lbf·in |
Ambient conditions 6
| installation altitude at height above sea level maximum | 2 000 m |
|---|---|
| ambient temperature: during operation | -25 ... +60 °C; Please observe derating at temperatures of 40 °C or above |
| ambient temperature: during storage and transport | -40 ... +80 °C |
| environmental category: during operation according to IEC 60721 | 3K6 (no ice formation, only occasional condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6 |
| environmental category: during storage according to IEC 60721 | 1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4 |
| environmental category: during transport according to IEC 60721 | 2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m) |
Electromagnetic compatibility 1
| EMC emitted interference | acc. to IEC 60947-4-2: Class A |
|---|
Communication/ Protocol 6
| communication module is supported: PROFINET standard | Yes |
|---|---|
| communication module is supported: PROFINET high-feature | Yes |
| communication module is supported: EtherNet/IP | Yes |
| communication module is supported: Modbus RTU | Yes |
| communication module is supported: Modbus TCP | Yes |
| communication module is supported: PROFIBUS | Yes |
UL/CSA ratings 11
| of the fuse: usable for Standard Faults up to 575/600 V according to UL | Type: Class J / L, max. 1600 A; Iq = 30 kA |
|---|---|
| of the fuse: usable for High Faults up to 575/600 V according to UL | Type: Class J / L, max. 1200 A; Iq = 100 kA |
| of the fuse: usable for Standard Faults at inside-delta circuit up to 575/600 V according to UL | Type: Class J / L, max. 1600 A; Iq = 30 kA |
| of the fuse: usable for High Faults at inside-delta circuit up to 575/600 V according to UL | Type: Class J / L, max. 1200 A; Iq = 100 kA |
| operating power [hp] for 3-phase motors: at 200/208 V at 50 °C rated value | 150 hp |
| operating power [hp] for 3-phase motors: at 220/230 V at 50 °C rated value | 200 hp |
| operating power [hp] for 3-phase motors: at 460/480 V at 50 °C rated value | 400 hp |
| operating power [hp] for 3-phase motors: at 200/208 V at inside-delta circuit at 50 °C rated value | 300 hp |
| operating power [hp] for 3-phase motors: at 220/230 V at inside-delta circuit at 50 °C rated value | 350 hp |
| operating power [hp] for 3-phase motors: at 460/480 V at inside-delta circuit at 50 °C rated value | 750 hp |
| contact rating of auxiliary contacts according to UL | R300-B300 |
IEC 62061 2
| Safety Integrity Level (SIL) according to IEC 62061 | SIL 1 |
|---|---|
| PFHD with high demand rate according to IEC 62061 | 1E-6 1/h |
ISO 13849 2
| performance level (PL) according to ISO 13849-1 | PL c |
|---|---|
| category according to ISO 13849-1 | 2 |
IEC 61508 7
| Safety Integrity Level (SIL): according to IEC 61508 | SIL 1 |
|---|---|
| safety device type according to IEC 61508-2 | Type B |
| PFHD with high demand rate according to IEC 61508 | 1E-6 1/h |
| PFDavg with low demand rate according to IEC 61508 | 0.09 |
| Safe failure fraction (SFF) | 60 % |
| hardware fault tolerance according to IEC 61508 | 0 |
| T1 value of service life according to IEC 61508 | 20 a |
Electrical Safety 2
| 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 |
ATEX 9
| Safety Integrity Level (SIL) according to IEC 61508 relating to ATEX | SIL 1 |
|---|---|
| PFHD with high demand rate according to IEC 61508 relating to ATEX | 5E-7 1/h |
| PFDavg with low demand rate according to IEC 61508 relating to ATEX | 0.008 |
| hardware fault tolerance according to IEC 61508 relating to ATEX | 0 |
| T1 value for proof test interval or service life according to IEC 61508 relating to ATEX | 3 a |
| certificate of suitability: ATEX | Yes |
| certificate of suitability: IECEx | Yes |
| certificate of suitability: according to ATEX directive 2014/34/EU | BVS 18 ATEX F 003 X |
| type of protection according to ATEX directive 2014/34/EU | II (2)G [Ex eb Gb] [Ex db Gb] [Ex pxb Gb], II (2)D [Ex tb Db] [Ex pxb Db], I (M2) [Ex db Mb] |
Approvals Certificates 1
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 95.3 kg |
|---|
Logistics 7
| Net weight | 11.587 kg |
|---|---|
| Package dimensions | 528 × 328 × 338 mm |
| Country of origin | CZ |
| Shipping weight | 12.587 kg |
| Ships from | Türkiye |
| Dispatch | — |
| Stock | On request |
Source: manufacturer data · Last verified: 31 Oct 2026
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Other ratings
All 23 ratings in 3RW5
Siemens 3RW5 series page →
| Motor power | Rated current | Part number | Model no | Stock | Dispatch | Price | Add to cart |
|---|---|---|---|---|---|---|---|
| 13 A | 3RW5513-1HF14 | 3RW5 | On request | — | $1,364.76 | Quote | |
| 18 A | 3RW5514-1HF14 | 3RW5 | On request | — | $1,521.77 | Quote | |
| 25 A | 3RW5515-1HF14 | 3RW5 | On request | — | $1,690.87 | Quote | |
| 32 A | 3RW5516-1HF14 | 3RW5 | On request | — | $1,884.09 | Quote | |
| 38 A | 3RW5517-1HF14 | 3RW5 | On request | — | $2,101.49 | Quote | |
| 47 A | 3RW5524-1HF14 | 3RW5 | On request | — | $2,379.25 | Quote | |
| 63 A | 3RW5525-1HF14 | 3RW5 | On request | — | $2,644.97 | Quote | |
| 77 A | 3RW5526-1HF14 | 3RW5 | On request | — | $2,946.85 | Quote | |
| 93 A | 3RW5527-1HF14 | 3RW5 | On request | — | $3,224.69 | Quote | |
| 113 A | 3RW5534-6HF14 | 3RW5 | On request | — | $3,623.19 | Quote | |
| 143 A | 3RW5535-6HF14 | 3RW5 | On request | — | $4,323.66 | Quote | |
| 171 A | 3RW5536-6HF14 | 3RW5 | On request | — | $5,024.13 | Quote | |
| 210 A | 3RW5543-6HF14 | 3RW5 | On request | — | $5,857.49 | Quote | |
| 250 A | 3RW5544-6HF14 | 3RW5 | On request | — | $6,835.70 | Quote | |
| 315 A | 3RW5545-6HF14 | 3RW5 | On request | — | $8,103.83 | Quote | |
| 370 A | 3RW5546-6HF14 | 3RW5 | On request | — | $9,480.67 | Quote | |
| 470 A | 3RW5547-6HF14 | 3RW5 | On request | — | $11,171.42 | Quote | |
| 570 A | 3RW5548-6HF14 This part | 3RW5 | On request | — | $12,560.32 | Quote | |
| 630 A | 3RW5552-6HA14 | 3RW5 | Low stock | $10,435.11 | |||
| 720 A | 3RW5553-6HA14 | 3RW5 | Low stock | $11,579.30 | |||
| 840 A | 3RW5554-6HA14 | 3RW5 | Low stock | $12,481.59 | |||
| 1100 A | 3RW5556-6HA14 | 3RW5 | On request | — | $17,980.27 | Quote | |
| 1280 A | 3RW5558-6HA14 | 3RW5 | On request | — | $20,377.67 | Quote |
Certifications
Certifications and standards
- IEC 61557-12
- IEC 60947-4
Quick answers
Questions about the 3RW55
What is the rated current of 3RW55?
The rated current of 3RW55 is 570 A.
Which supply voltage is 3RW55 rated for?
The rated operational voltage of 3RW55 is 480 V AC.
What is the EAN of 3RW55?
The EAN (GTIN) of 3RW55 is 4047621042244.
Where does 3RW55 ship from, and how fast?
3RW55 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival.
Guides
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Reviews
Customer reviews
Series
Siemens 3RW5
- Brand
- Siemens
- Series
- 3RW5
- Rated current
- 13–1280 A
- Supply voltage
- 480 V AC
- Ratings listed
- 23
