{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4434-2BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4434-2BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4434-2BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4434-2BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4434-2BC34 soft starter, 196 A at 40 °C, 690 V insulation voltage, 50/60 Hz, screw fixing, 270 mm depth, 170 mm width, 200 mm height.","salesMarkdown":"## 196 A at 40 °C — the derating curve matters The 3RW4434-2BC34: That 40 °C ceiling is the reference point — above it, the continuous current drops by about 12 % per 10 °C rise, so a panel running at 50 °C ambient loses 23 A of headroom. Adjustable current limitation and built-in motor overload protection let it serve as both the soft-start device and the overload relay in one package — no separate thermal bimetallic needed downstream. The 8 % minimum load setting means it can start lightly loaded conveyors or pumps without tripping on undercurrent. ## Inside-delta wiring and mounting flexibility Supports inside-delta circuit configuration, which reduces the current through the thyristors to 58 % of the line current — useful for retrofitting into existing delta-wound motor circuits where the soft starter sits in the delta legs rather than the supply lines. The screw-fixing mount accepts a vertical surface with ±90° rotation and ±22.5° tilt front-to-back, so it fits enclosures where the backplane is not perfectly plumb. Main circuit connection uses busbar (for high current) or cable lugs: stranded 25…120 mm², finely stranded 16…95 mm², or 4…250 kcmil. The 270 mm depth means it needs a 300 mm deep enclosure minimum for cable bending radius. Compliance documentation includes pollution degree 3 per IEC 60947-4-2 (conductive pollution typical in industrial panels), 50…60 Hz operating frequency, and a 500 m maximum wire length from the soft starter to the motor — beyond that, voltage drop on starting may require a larger unit or a line reactor.","metaTitle":"Siemens 3RW4434-2BC34 SIRIUS Soft Starter, 196 A, 690 V","metaDescription":"Siemens 3RW4434-2BC34 SIRIUS soft starter, 196 A at 40°C, 690 V insulation voltage, adjustable current limitation, motor overload protection.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"170mm","title":"3RW4434-2BC34","Height":"200mm","Upwards":"100mm","Stranded":"25 ... 120 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 460 V, 50 °C standard: 100 A, 75 hp Inside-delta: 173 A, 125 hp 200-460 V AC, 115 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5534-2HA14<<","During Storage":"-25 ... +80°C","External Reset":"Yes","Finely Stranded":"16 ... 95 mm²","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","For Main Contacts":"4 ... 250 kcmil","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"500m","Derating Temperature":"40°C","Inside-Delta Circuit":"Yes","at 50 Hz rated value":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"196A","at 50 °C rated value":"173A","at 60 °C rated value":"152A","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","Using The Back Clamping Point":"6 ... 2/0","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"6 ... 2/0","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"Display","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"Yes","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":"Yes","at standard circuit at 40 °C rated value":"55kW","at standard circuit at 50 °C rated value":"75hp","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":"3","Type Of Voltage Of The Control Supply Voltage":"AC","at inside-delta circuit at 40 °C rated value":"110kW","at inside-delta circuit at 50 °C rated value":"125hp","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","Operating Voltage At Inside-Delta Circuit Rated Value":"200 ... 460V","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":"64W","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":"22A","Relative Negative Tolerance Of The Operating Voltage At Inside-Delta Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Inside-Delta Circuit":"10%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4,338.32","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d6976c49bef6d708fce49e20e3ba3715.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=143747&mlfb=3RW4434-2BC34"},"ai":{"faq":[{"question":"What is the 3RW4434-2BC34's depth?","answer":"The depth is 270 mm, with a width of 170 mm and height of 200 mm. This requires a minimum 300 mm deep enclosure to accommodate cable bending radius on the main circuit connections."},{"question":"What compliance standards does the 3RW4434-2BC34 meet?","answer":"The built-in motor overload protection and intrinsic device protection are integral to the soft starter design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4434-2BC34","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/3RW4434-2BC34 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}}