{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4037-1BB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4037-1BB15","canonicalUrl":"https://aoctrl.com/siemens/3RW4037-1BB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4037-1BB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4037-1BB15 soft starter, S2 frame, 63 A at 40 °C, 55 mm width, 160 mm height, 170 mm depth, screw-type terminals, integrated bypass, 110-230 V DC control supply.","salesMarkdown":"## Continuous current and the thermal envelope The 3RW4037-1BB15: Derates to 58 A at 50 °C and 53 A at 60 °C, so the enclosure ventilation and the ambient temperature inside the panel govern whether this S2 frame holds the line without tripping the internal thermal model. The 55 mm width on a TS35 DIN rail means it occupies one standard slot in a multi-starter lineup. Depth of 170 mm and height of 160 mm — the vertical clearance above and below the unit is 60 mm upward and 40 mm downward for air circulation and cable bending radius. ## Control supply and motor protection — what is built in Control supply voltage is 110-230 V DC — a range that covers the common station battery voltages (110 VDC and 125 VDC in power plants, 220 VDC in some industrial DC grids) without an external DC-DC converter. Operating frequency is 50-60 Hz, so the soft starter is indifferent to the line frequency of the motor. Motor overload protection is integrated, and the current limitation is adjustable down to 20% of the rated current. That means one device handles both the starting ramp and the running overload — no separate overload relay to size, wire, and set. The integrated bypass contact system carries the full-load current once the ramp is complete, taking the thyristors out of the circuit and eliminating the heat they would otherwise dissipate during continuous running. ## Termination and wiring — screw-type terminals, dual clamping points Auxiliary and control circuits also use screw-type terminals, with the auxiliary contact range 2x (20-14 AWG). The dual clamping points on the main terminals let you land two conductors per pole — useful for daisy-chaining the line feed through the soft starter to a downstream device without a separate terminal block. ## Mounting position and environmental limits Fastening method is screw and snap-on mounting — snaps onto a TS35 DIN rail without tools, or can be screw-mounted to a backplate. With the additional fan fitted, the mounting surface can be vertical and rotated ±90°, or tilted ±22.5° front-to-back. Without the fan, the rotation is limited to ±10°. Pollution degree 3 per IEC 60947-4-2 means it is rated for conductive pollution environments — typical for industrial control panels that are not hermetically sealed.","metaTitle":"Siemens 3RW4037-1BB15 Soft Starter, 63 A at 40 °C, SIRIUS S2","metaDescription":"Siemens 3RW4037-1BB15 SIRIUS soft starter, 63 A at 40 °C, 55 mm wide, integrated bypass. Active production. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"170mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"55mm","title":"3RW4037-1BB15","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, 37 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC Screw terminals","During Storage":"-40 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","Mounting Position":"With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t","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 (20 ... 14)","For Main Current Circuit":"screw-type terminals","Motor Overload Protection":"Yes","Using Both Clamping Points":"2x (16 ... 2)","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","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":"screw-type 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 (0.5 ... 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":"37kW","at standard circuit at 50 °C rated value":"50hp","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","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":"400 ... 600V","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%","For Auxiliary Contacts Finely Stranded With Core End Processing":"2x (20 ... 16)","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":"12W","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%","Adjustable Motor Current For Motor Overload Protection Minimum Rated Value":"26A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e68a63576757a971e0bccc74bb61cf76.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=68470&mlfb=3RW4037-1BB15"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4037-1BB15","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/3RW4037-1BB15 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}}