{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4037-1TB05","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4037-1TB05","canonicalUrl":"https://aoctrl.com/siemens/3RW4037-1TB05","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4037-1TB05","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4037-1TB05 soft starter, S2 frame, 63 A at 40 °C, 50/60 Hz, 600 V insulation, integrated bypass, screw and snap-on mounting.","salesMarkdown":"The 3RW4037-1TB05: That 40 °C baseline is the typical panel ambient; if your enclosure runs hotter, size up or plan for the derate. The integrated bypass contact carries the motor current at full speed, pulling the thyristors out of circuit — no external bypass contactor needed, and the heat load in the panel drops once the motor is up to speed. ## S2 frame — panel fit and mounting S2 frame dimensions: 55 mm wide, 160 mm high, 170 mm deep. That 55 mm width is a single 3-module DIN-rail slot — fits in a standard distribution board without eating adjacent positions. Mounting is screw or snap-on. The mounting position is flexible — vertical surface with up to ±90° rotation with an additional fan, or ±10° without. Keep the clearance: 60 mm upwards, 40 mm downwards, 30 mm at the side for airflow and wiring access. ## Motor protection and control built in Motor overload protection is integrated — no separate overload relay needed. Adjustable current limitation lets you set the starting torque profile between 20% and the full rated current. Intrinsic device protection covers the soft starter itself against overtemperature and phase imbalance. The red fault signal display gives a visual trip indication on the front panel. External reset input allows remote fault reset from a PLC or pushbutton — keeps the operator away from the panel door during a restart sequence. ## Wiring and environment Auxiliary contact terminals take 2x (20 … 14) AWG. Maximum motor cable length is 300 m — within typical industrial runs, but check for reflected-wave risk on long feeders. Insulation voltage rated 600 V.","metaTitle":"Siemens 3RW4037-1TB05 SIRIUS Soft Starter, 63 A, S2 Frame","metaDescription":"Siemens 3RW4037-1TB05 SIRIUS soft starter, 63 A at 40°C, S2 frame, integrated bypass, adjustable current limit. Active production, sourced to order.","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":"3RW4037-1TB05","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, 24 V AC/DC Screw terminals Thermistor motor protection","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 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 (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","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","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":"Yes","at standard circuit at 40 °C rated value":"37kW","at standard circuit at 50 °C rated value":"50hp","control supply voltage 1 at DC rated value":"24V","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":"-20%","relative positive tolerance of the control supply voltage at DC":"20%","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/92ef5ea32d120eeffd2852803a39d4f9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=64067&mlfb=3RW4037-1TB05"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RW4037-1TB05?","answer":"Pricing and stock are confirmed at quote time. Submit an RFQ with your target quantity; we source through authorized distribution and confirm lead time and volume pricing on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4037-1TB05","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/3RW4037-1TB05 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}}