{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW3037-2BB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW3037-2BB04","canonicalUrl":"https://aoctrl.com/siemens/3RW3037-2BB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW3037-2BB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW3037-2BB04 soft starter, S2 frame, 63 A at 40 °C, 50/60 Hz, 24 V control, integrated bypass contact system, screw and snap-on mounting.","salesMarkdown":"## 63 A motor starting — what the rating means for the install The 3RW3037-2BB04: For a motor with a 50 A FLA at 40 °C ambient, this starter holds headroom through the derating curve without upsizing the frame. The integrated bypass contact system eliminates the external bypass contactor and its wiring — the thyristors fire only during the start ramp, then the bypass relay closes, shunting current away from the semiconductors. This cuts heat dissipation in the panel during run and extends the life of the power stack. ## Panel fit — S2 frame, mounting, and clearances The S2 frame measures 55 mm wide, 160 mm high, and 170 mm deep — a compact footprint that fits a 6-module-wide DIN rail slot. Screw and snap-on mounting lets you either clip it onto the rail or bolt it directly to the backplate; the snap-on feature speeds replacement in a panel where the rail is already populated. Clearance requirements: 60 mm above, 40 mm below, and 30 mm at the side. These are the minimum air gaps for airflow and wiring access — stack them tighter and the derating curve shifts. The mounting position allows ±10° rotation and ±10° tilt from vertical, useful when the panel has a sloped gland plate. Pollution degree 3 per IEC 60947-4-2 means the creepage distances are designed for conductive dust and occasional condensation — typical for a motor control centre in a cement plant or sawmill, not just a climate-controlled switchroom. ## Wiring terminals and conductor sizing Main circuit terminals accept stranded wire 2x (1.5... 25 mm²) — that covers everything from a 4 mm² motor feed up to a 25 mm² supply cable for the full 63 A rating. Screw-type terminals on the main current circuit — no cage-clamp or push-in on the power side. Torque the screws to the value on the nameplate; the clamping points are dual (front and back) so you can loop through or terminate two conductors per pole. Maximum motor cable length is 300 m — above that, the cable capacitance can cause the thyristors to self-trigger on the off half-cycle. For long runs, add an output reactor or keep the cable below this limit.","metaTitle":"Siemens 3RW3037-2BB04 SIRIUS Soft Starter, 63 A, S2 Frame","metaDescription":"Siemens 3RW3037-2BB04 SIRIUS soft starter, 63 A at 40°C, S2 frame, integrated bypass. Active production — quoted to order. Request RFQ.","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":"3RW3037-2BB04","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, 24 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 50 Hz rated value":"24V","at 60 Hz rated value":"24V","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","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","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","control supply voltage 1 at DC rated value":"24V","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f9f2fd72e133c2181abd4363b694ae7c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=356113&mlfb=3RW3037-2BB04"},"ai":{"faq":[{"question":"Where can I buy the 3RW3037-2BB04 and get a price?","answer":"No stock-holding claim on this listing."},{"question":"What is the 3RW3037-2BB04's depth for panel layout?","answer":"The depth is 170 mm, with a width of 55 mm and height of 160 mm. The S2 frame fits a standard DIN-rail slot with the clearance requirements listed above."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW3037-2BB04","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/3RW3037-2BB04 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}}