{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW3027-2BB14","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW3027-2BB14","canonicalUrl":"https://aoctrl.com/siemens/3RW3027-2BB14","factsUrl":"https://aoctrl.com/api/mcp/products/3RW3027-2BB14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW3027-2BB14 soft starter, Size S0 frame, 32 A at 40 °C, 45 mm width, 150 mm depth, screw and snap-on DIN rail mounting, spring-loaded terminals, integrated bypass, 110-230 V DC control supply.","salesMarkdown":"## Panel fit and mounting — Size S0 frame The 3RW3027-2BB14 is a Size S0 frame soft starter, 45 mm wide, 150 mm deep, and 150 mm tall. Mounting position allows ±10° rotation and ±10° tilt forward/back from vertical. Clearance requirements: 60 mm upward, 40 mm downward, 15 mm at the sides for airflow. ## Current ratings and thermal derating The derating starts at 40 °C — above that, the continuous current drops linearly. For a 25 A motor at 50 °C ambient, this unit has 4 A headroom. Minimum load is 10% of the rated current — below that the thyristor firing angle may not hold conduction. For a 32 A unit, the motor should draw at least 3.2 A at start. ## Termination and wiring — spring-loaded terminals Auxiliary and control circuits also use spring-loaded terminals, wire range 2x (24... 14 AWG). Front clamping point accepts 1x 8 AWG or 2x (16... 10 AWG) for larger conductors. Maximum motor cable length is 300 m — beyond that, capacitive charging current may cause nuisance tripping. ## Control supply and bypass — what's built in Control supply voltage is 110... 230 V DC — a single DC rail covers both 110 V and 230 V control systems without rewiring. Operating frequency is 50... 60 Hz. Integrated bypass contact system means the thyristors are shorted out after the motor reaches full speed — no external bypass contactor needed, and the heat load drops to near zero during run. No motor overload protection built in — an external overload relay (e.g., Siemens 3RU2 series) is required. No adjustable current limitation, no inside-delta circuit, no motor brake output. ## Lifecycle and sourcing — current production Lifecycle stage is current production — this is an active catalog item from Siemens, not a phase-out or NRND part. Storage temperature range -40... +80 °C per IEC 60721 class 1K6 (occasional condensation, no salt mist, sand excluded). Operating temperature -25... +60 °C.","metaTitle":"Siemens 3RW3027-2BB14 SIRIUS Soft Starter, 32A, Size S0","metaDescription":"Siemens 3RW3027-2BB14 SIRIUS soft starter, 32A at 40°C, 45mm wide, Size S0 frame. Integrated bypass, spring terminals, 110-230V DC control.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"150mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45mm","title":"3RW3027-2BB14","Height":"150mm","Upwards":"60mm","Downwards":"40mm","Thyristors":"Yes","At The Side":"15mm","description":"SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC spring-type terminals","During Storage":"-40 ... +80°C","External Reset":"No","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"10%","For Main Contacts":"16 ... 8","Mounting Position":"With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° tiltable to the front and back","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 40 °C rated value":"32A","at 50 °C rated value":"29A","at 60 °C rated value":"26A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"spring-loaded terminals","Motor Overload Protection":"No","Intrinsic Device Protection":"No","Adjustable Current Limitation":"No","Size Of Engine Control Device":"S0","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"1x 8, 2x (16 ... 10)","control supply voltage 1 at DC":"110 ... 230V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"No","during storage according to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","reference code according to EN 61346-2":"Q","control supply voltage 1 at AC at 50 Hz":"110 ... 230V","control supply voltage 1 at AC at 60 Hz":"110 ... 230V","during operation according to IEC 60721":"3K6 (no formation of ice, no condensation), 3C3 (no salt mist), 3S2 (sand must not get into the devices), 3M6","during transport according to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Evaluation Of Thermistor Motor Protection":"No","at standard circuit at 40 °C rated value":"15kW","at standard circuit at 50 °C rated value":"20hp","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"1","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Control Supply Voltage Frequency 1 Rated Value":"50Hz","Control Supply Voltage Frequency 2 Rated Value":"60Hz","Installation Altitude At Height Above Sea Level":"5 000m","continuous operating current [% of Ie] at 40 °C":"115%","Operating Voltage At Standard Circuit Rated Value":"200 ... 480V","contact rating of auxiliary contacts according to UL":"B300 / R300","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"10%","relative negative tolerance of the control supply voltage at DC":"-15%","relative positive tolerance of the control supply voltage at DC":"10%","Relative Negative Tolerance Of The Control Supply Voltage Frequency":"-10%","Relative Positive Tolerance Of The Control Supply Voltage Frequency":"10%","Relative Negative Tolerance Of The Operating Voltage At Standard Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Standard Circuit":"10%","power loss [W] at operational current at 40 °C during operation typical":"13W","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-15%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-15%","relative positive tolerance of the control supply voltage at AC at 50 Hz":"10%","relative positive tolerance of the control supply voltage at AC at 60 Hz":"10%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d750415783126d8ae9ed08d703bf16ed.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=351678&mlfb=3RW3027-2BB14"},"ai":{"faq":[{"question":"What is the rated current of 3RW3027-2BB14 at different ambient temperatures?","answer":"Rated 32 A at 40 °C, derated to 29 A at 50 °C, and 26 A at 60 °C. The derating starts at 40 °C ambient."},{"question":"Does 3RW3027-2BB14 include an integrated bypass?","answer":"Yes, it has an integrated bypass contact system. After the motor reaches full speed, the thyristors are shorted out, eliminating heat dissipation during run."},{"question":"What wire sizes does the 3RW3027-2BB14 accept on the main circuit?","answer":"The front clamping point accepts 1x 8 AWG or 2x (16... 10 AWG)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW3027-2BB14","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RW3027-2BB14 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}