{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW3037-2BB14","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW3037-2BB14","canonicalUrl":"https://aoctrl.com/siemens/3RW3037-2BB14","factsUrl":"https://aoctrl.com/api/mcp/products/3RW3037-2BB14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW3037-2BB14 soft starter, Size S2, 63 A rated current at 40 °C, 55 mm width, integrated bypass contact system, screw-type main terminals, spring-loaded auxiliary/control terminals.","salesMarkdown":"## Rated current and thermal derating The 3RW3037-2BB14: That 10 °C step from 40 to 50 °C costs you 5 A — if your panel ambient runs at 50 °C, size the motor FLA against the 58 A ceiling, not the 63 A label. The integrated bypass contact system carries the full motor current once the starter transitions to run state, which drops the thyristor heat load. This means the derating curve above applies to the start duty cycle, not the continuous run current — the bypass handles steady-state. ## Terminal assignment and wire sizing The back clamping point accepts 16... 2 AWG; the front clamping point accepts 18... 2 AWG. For a 63 A motor circuit, you will land 16 mm² or 6 AWG on the main terminals — the dual clamping points let you parallel two conductors per phase if needed. Auxiliary and control circuits terminate on spring-loaded terminals, accepting 2x (24... 14 AWG). The spring cage saves time on control wiring — no screw torque check, just push in the ferrule. ## Mounting and clearances Size S2 frame measures 55 mm wide, 160 mm high, 170 mm deep. Fastening is screw and snap-on mounting to DIN rail — the snap-on foot lets you pre-wire the panel and clip the starter in last. Required clearances: 60 mm upward, 40 mm downward, 30 mm at the side for airflow and wiring access. Mounting position requires a vertical surface within ±10° rotation and ±10° tilt. Pollution degree 3 per IEC 60947-4-2 means it is rated for conductive pollution environments typical of industrial control panels without conformal coating. ## Control supply and operating conditions Control supply voltage accepts 110... 230 V DC — a wide-range DC input that simplifies panel wiring since you do not need a separate AC control transformer for the starter logic. Operating frequency is 50... 60 Hz for the line input. Ambient operating range is -25... +60 °C; storage range is -40... +80 °C. The minimum load is 10 % of rated current — below that the thyristor firing angle may not trigger reliably, so do not use this on a motor drawing under 6.3 A FLA. Lifecycle stage is current production — this is an active catalog part from Siemens, not a phase-out or NRND line. The SIRIUS 3RW30 series is the standard-performance soft starter family from Siemens. The 3RW3037-2BB14 sits at the 63 A / Size S2 position in that family.","metaTitle":"Siemens 3RW3037-2BB14 SIRIUS Soft Starter, 63 A, Size S2","metaDescription":"Siemens 3RW3037-2BB14 SIRIUS soft starter, 63 A at 40 °C, Size S2, integrated bypass, screw main terminals. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"170mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"55mm","title":"3RW3037-2BB14","Height":"160mm","Upwards":"60mm","Stranded":"2x (1.5 ... 25 mm²)","Downwards":"40mm","Thyristors":"Yes","At The Side":"30mm","description":"SIRIUS soft starter S2 63 A, 30 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%","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":"63A","at 50 °C rated value":"58A","at 60 °C rated value":"53A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"screw-type terminals","Motor Overload Protection":"No","Using Both Clamping Points":"2x (16 ... 2)","Intrinsic Device Protection":"No","Adjustable Current Limitation":"No","Size Of Engine Control Device":"S2","Using The Back Clamping Point":"16 ... 2","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"18 ... 2","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":"30kW","at standard circuit at 50 °C rated value":"40hp","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":"-10%","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":"12W","relative negative tolerance of the control supply voltage at AC at 50 Hz":"-10%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-10%","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":"$461.01","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/54f3878180b4956d108fb6bea5f0ad66.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=316302&mlfb=3RW3037-2BB14"},"ai":{"faq":[{"question":"What is the rated current of 3RW3037-2BB14 at different ambient temperatures?","answer":"The integrated bypass carries steady-state current after start."},{"question":"What wire sizes does 3RW3037-2BB14 accept on the main terminals?","answer":"Back clamping point accepts 16... 2 AWG; front clamping point accepts 18... 2 AWG."},{"question":"Does 3RW3037-2BB14 have an integrated bypass contactor?","answer":"Yes, the integrated bypass contact system carries full motor current in run state, removing heat load from the thyristors during continuous operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW3037-2BB14","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/3RW3037-2BB14 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}}