{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4037-2TB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4037-2TB04","canonicalUrl":"https://aoctrl.com/siemens/3RW4037-2TB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4037-2TB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4037-2TB04 soft starter, Size S2, 63 A at 40 °C, 50/60 Hz, 600 V insulation, integrated bypass, screw terminals, 55 mm width.","salesMarkdown":"## Current rating and thermal derating The 3RW4037-2TB04: The integrated bypass contact system means the thyristors are shorted out once the motor reaches full speed, eliminating the heat load from the semiconductor stack during continuous run — the derating curve applies to the start duty, not the steady-state. ## Panel fit and wiring Size S2 frame at 55 mm wide, 160 mm tall, 170 mm deep — fits a standard 55 mm-wide DIN-rail slot with screw and snap-on mounting. Clearance requirements: 60 mm upwards, 40 mm downwards, 30 mm at the side — the 30 mm side gap is the tightest; adjacent devices must respect that for airflow and wiring access. ## Environmental and protection specs Operates from -25 to +60 °C ambient, stores from -40 to +80 °C — the -25 °C floor covers cold-start conditions in unheated plant areas. Degree of pollution 3 per IEC 60947-4-2 — rated for conductive pollution typical in industrial control panels where condensation or light dust is present. Insulation voltage rated 600 V, operating frequency 50... 60 Hz — covers global 400 V and 480 V line supplies without derating. ## Motor protection and control features Built-in motor overload protection and intrinsic device protection — the soft starter monitors both the motor current and its own thyristor temperature, reducing the need for an external overload relay in many installations. Adjustable current limitation with a minimum load of 20 % — set the start current between 20 % and the full rated current of the unit, matching the motor's breakaway torque requirement without tripping upstream protection. External reset input allows remote fault clearing from a PLC or pushbutton station — the red fault display gives local indication.","metaTitle":"Siemens 3RW4037-2TB04 SIRIUS Soft Starter, 63 A, 55 mm","metaDescription":"Siemens 3RW4037-2TB04 SIRIUS soft starter, 63 A at 40 °C, integrated bypass, adjustable current limit, screw terminals, active production, available 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":"3RW4037-2TB04","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 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 (24 ... 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","during storage acc. to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","For Auxiliary And Control Circuit":"spring-loaded terminals","during operation acc. 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 acc. to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Product Component Motor Brake Output":"No","reference code acc. to DIN EN 61346-2":"Q","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":"Yes","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":"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","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front","continuous operating current [% of Ie] at 40 °C":"115%","Operating Voltage At Standard Circuit Rated Value":"200 ... 480V","protection class IP on the front acc. to IEC 60529":"IP20","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":"-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":"-20%","relative negative tolerance of the control supply voltage at AC at 60 Hz":"-20%","relative positive tolerance of the control supply voltage at AC at 50 Hz":"20%","relative positive tolerance of the control supply voltage at AC at 60 Hz":"20%","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/7ccddc9d457d8c8a90aaf934fb75c701.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298595&mlfb=3RW4037-2TB04"},"ai":{"faq":[{"question":"How can I order the 3RW4037-2TB04 or check availability?","answer":"Submit an RFQ for your required quantity and ship-to location."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4037-2TB04","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/3RW4037-2TB04 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}}