{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4056-6BB44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4056-6BB44","canonicalUrl":"https://aoctrl.com/siemens/3RW4056-6BB44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4056-6BB44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4056-6BB44 soft starter, Size S6, 162 A at 40 °C, 250 mm depth, screw fixing.","salesMarkdown":"The Siemens 3RW4056-6BB44 is a SIRIUS soft starter, Size S6, built for three-phase induction motor starting. It delivers 162 A at 40 °C (145 A at 50 °C, 125 A at 60 °C) and carries a 600 V insulation rating. The thyristor-based design ramps voltage to limit inrush current, with adjustable current limitation and motor overload protection built in — no external overload relay needed for most installations. Rated operating frequency is 50 to 60 Hz at 230 V. The 20% minimum load setting means it handles lightly loaded motors without nuisance tripping. Screw-fixed mounting with a 250 mm depth, 120 mm width, 198 mm height. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides. With an additional fan, you can rotate the unit ±90° on a vertical surface or tilt it ±22.5°; without the fan, rotation and tilt are limited to ±10° each. Busbar connection for the main current circuit; main terminals accept 4 to 250 kcmil, auxiliary terminals accept 2x (20 to 14 AWG) solid or 2x (0.5 to 2.5 mm²) fine-stranded. Wire length from the starter to the motor should not exceed 300 m — keep that in mind if the motor is remote. The internal-delta circuit is not supported, so this unit goes in-line with the motor leads, not in the delta loop.","metaTitle":"Siemens 3RW4056-6BB44 SIRIUS Soft Starter, 162A, Size S6","metaDescription":"Siemens 3RW4056-6BB44 SIRIUS soft starter, 162A at 40°C, Size S6, current production. Screw-fixed, 250mm depth. Rated 600V insulation. RFQ for lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"250mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"120mm","title":"3RW4056-6BB44","Height":"198mm","Upwards":"100mm","Stranded":"2x (25 ... 120 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter S6 162 A, 90 kW/400 V, 40 °C 200-460 V AC, 230 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5056-6AB14<<","During Storage":"-40 ... +80°C","External Reset":"Yes","Finely Stranded":"2x (16 ... 95 mm²)","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw fixing","Minimum Load [%]":"20%","For Main Contacts":"4 ... 250 kcmil","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":"230V","at 60 Hz rated value":"230V","at 40 °C rated value":"162A","at 50 °C rated value":"145A","at 60 °C rated value":"125A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Using Both Clamping Points":"max. 2x 1/0","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S6","Using The Back Clamping Point":"6 ... 2/0","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"6 ... 2/0","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":"No","at standard circuit at 40 °C rated value":"90kW","at standard circuit at 50 °C rated value":"100hp","Finely Stranded Without Core End Processing":"max. 1x 50 mm², 1x 70 mm²","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","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 ... 460V","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 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":"75W","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":"87A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,324.00 – $2,880.36","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3156b87389bdd642a4a25cc172e6b9cc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=474881&mlfb=3RW4056-6BB44"},"ai":{"faq":[{"question":"What is the closest alternative to this soft starter in the SIRIUS family?","answer":"Within the SIRIUS 3RW40 series, the closest alternative would be a different Size S6 variant with a different current rating or voltage range. No pin-compatible drop-in replacement is listed; verify the specific rating needed for your motor before cross-referencing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4056-6BB44","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/3RW4056-6BB44 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}}