{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4056-2BB35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4056-2BB35","canonicalUrl":"https://aoctrl.com/siemens/3RW4056-2BB35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4056-2BB35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4056-2BB35 soft starter, Size S6, 162 A at 40°C, 115 V control voltage, thyristor-based, adjustable current limitation, screw fixing.","salesMarkdown":"## 162 A at 40°C — what it means for your motor load The 3RW4056-2BB35: That temperature derating curve is the real limit for panel placement — if your enclosure runs hot, the usable current falls fast. ## Thyristor switching and adjustable current limit Solid-state thyristors handle the motor inrush — no contact wear, so it's suited for frequent starts. The adjustable current limitation lets you set the start current below the full-load rating, which protects both the motor and the downstream wiring during acceleration. Minimum load is 20% of the rated current, so it won't regulate properly on very small motors — size the starter to the motor FLA, not the panel rating. ## Panel fit and mounting constraints Size S6 frame: 198 mm high, 120 mm wide, 250 mm deep. Screw fixing to the back panel — no DIN rail snap-on. Clearance: 100 mm above, 75 mm below, 5 mm at the sides. That side gap is tight; plan your gland plate and cable routing accordingly. Mounting position depends on the fan option: with the additional fan, the unit can be mounted vertical with ±90° rotation and ±22.5° tilt front/back; without the fan, only ±10° rotation and ±10° tilt. If your panel has airflow constraints, the fan version buys more orientation flexibility. ## Wiring terminals and conductor sizes The main contact wire range also covers 4–250 kcmil. Auxiliary contacts accept 2x (24–16 AWG). Maximum motor cable length is 300 m — beyond that, capacitive charging current can cause nuisance tripping or reduce start torque. ## Environmental and compliance ratings Pollution degree 3 per IEC 60947-4-2 — suitable for industrial environments with conductive dust or occasional condensation. Operating temperature -25 to +60°C, storage -40 to +80°C. Insulation voltage rated 600 V.","metaTitle":"Siemens 3RW4056-2BB35 SIRIUS Soft Starter, 162 A at 40°C","metaDescription":"Siemens 3RW4056-2BB35 SIRIUS soft starter, Size S6, 162 A at 40°C, 115 V control, adjustable current limitation. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"250mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"120mm","title":"3RW4056-2BB35","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 spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5056-2AB15<<","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 (24 ... 16)","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":"spring-loaded 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 (0.25 ... 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%","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/807bda739ad2ad10a81307eca7afef4c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=93562&mlfb=3RW4056-2BB35"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4056-2BB35","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/3RW4056-2BB35 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}}