{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4056-6BB35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4056-6BB35","canonicalUrl":"https://aoctrl.com/siemens/3RW4056-6BB35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4056-6BB35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4056-6BB35 soft starter, Size S6, 162 A at 40 °C, 50/60 Hz, screw fixing, 250 mm depth, 120 mm width, 198 mm height.","salesMarkdown":"## Panel fit and frame dimensions The 3RW4056-6BB35 sits in the SIRIUS Size S6 frame — 250 mm deep, 120 mm wide, 198 mm tall — which sets the minimum enclosure depth for a backpanel layout. Screw fixing to the mounting plate; no DIN-rail snap-on here, so plan for drilled and tapped holes or a sub-panel. Clearance around the unit: 100 mm above, 75 mm below, 5 mm at the sides. That 75 mm bottom gap is the one that catches people — skimp on it and the power cables won't bend into the terminals without strain. ## Current ratings and thermal derating Headline rating is 162 A at 40 °C ambient — that's the number for a standard 40 °C panel environment. The derating temperature threshold is 40 °C, so above that the continuous current falls linearly. For a motor starting application, the inrush duty is brief, but the thermal model in the soft starter tracks the I²t accumulation across starts. Minimum load is 20 % of the rated current — below that the soft starter may not detect the motor load correctly. Adjustable current limitation is built in, so you can set the start current ceiling below the full 162 A to match the supply transformer or generator capacity. ## Termination and conductor sizing Main circuit connection uses busbar or cable lugs — the terminal accepts 4 AWG to 250 kcmil (25–120 mm² stranded) at the front and back clamping points, and 2x 1/0 max using both points. For auxiliary control wiring, solid or finely stranded 0.5–2.5 mm² (20–14 AWG) is the range. The busbar connection option is worth noting for panel builders who want a clean power distribution bar rather than individual cable tails. Maximum motor cable length is 300 m — beyond that the cable capacitance can cause nuisance tripping or affect the soft starter's firing angle control, especially on long runs to remote pumps or conveyors. ## Environmental and compliance Pollution degree 3 per IEC 60947-4-2 — this is the industrial default: conductive pollution or dry non-conductive pollution that becomes conductive due to condensation. The mounting position has restrictions: with the optional fan the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front-to-back; without the fan the rotation is limited to ±10°.","metaTitle":"Siemens 3RW4056-6BB35 SIRIUS Soft Starter, 162A, Size S6","metaDescription":"Siemens 3RW4056-6BB35 SIRIUS soft starter, 162A at 40°C, Size S6 frame, 250mm depth. Active production, screw-fix mounting, pollution degree 3. Quoted to order.","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":"3RW4056-6BB35","Height":"198mm","Upwards":"100mm","Stranded":"2x (25 ... 120 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter S6 145 A, 150 hp/575 V, 50 °C 400-600 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5056-6AB15<<","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":"115V","at 60 Hz rated value":"115V","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":"110kW","at standard circuit at 50 °C rated value":"150hp","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":"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 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":"$2,508.25","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/57d025292b89620d9abd28e73ba01e5f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=491965&mlfb=3RW4056-6BB35"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 3RW4056-6BB35?","answer":"The soft starter is designed to IEC 60947-4-2 (pollution degree 3). Typical Siemens documentation includes a CE declaration of conformity, UKCA, and UL/CSA file numbers — these are available on request. RoHS and REACH compliance is standard for current-production SIRIUS devices."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4056-6BB35","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/3RW4056-6BB35 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}}