{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4434-6BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4434-6BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4434-6BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4434-6BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4434-6BC34 soft starter, 196 A at 40 °C, 690 V insulation voltage, integrated bypass contact system, screw fixing, 270 mm depth.","salesMarkdown":"## Motor starting with integrated bypass The 3RW4434-6BC34: The integrated bypass contact system switches the thyristors out of the circuit once the motor is at speed, eliminating semiconductor heat losses during continuous run — the bypass carries the full motor current, not the silicon. ## Current derating and thermal planning If the panel ambient runs above 40 °C — common in a crowded enclosure with drives and contactors — the soft starter's continuous current capacity drops. The derating temperature is listed at 40 °C, so the panel ventilation and mounting position (vertical surface, ±90° rotatable, ±22.5° tiltable per) directly affect whether the unit can deliver its full rating. Adjustable current limitation lets you set the starting torque profile between 8% minimum load and the full rated current. ## Wiring and connection sizing Main circuit connections accept busbar or cable: stranded 25–120 mm², finely stranded 16–95 mm², or AWG 4–250 kcmil. The front and back clamping points both take 6–2/0 AWG; using both clamping points maxes at 2x 1/0. Maximum motor cable length is 500 m — beyond that, capacitive charging current from the cable can interfere with the soft starter's firing circuit. For long cable runs between the starter and motor, keep the total under this limit or add a line reactor. ## Inside-delta wiring option Inside-delta circuit capability means the soft starter can be wired between the motor windings rather than in the supply lines. This reduces the current through each thyristor to 58% of the line current — a 196 A line-rated starter in inside-delta configuration handles a motor with 338 A FLA. Useful for larger motors where the starter frame size would otherwise jump to the next rating.","metaTitle":"Siemens 3RW4434-6BC34 SIRIUS Soft Starter, 196 A, 690 V","metaDescription":"Siemens 3RW4434-6BC34 SIRIUS soft starter, 196 A at 40°C, 690 V insulation, integrated bypass. Active production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"170mm","title":"3RW4434-6BC34","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 Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5534-6HA14<<","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%","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 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 AWG cables for main contacts":"4 ... 250 kcmil","For Auxiliary And Control Circuit":"screw-type 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","for AWG cables for auxiliary contacts":"2x (20 ... 14)","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":"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%","at AWG cables for auxiliary contacts finely stranded with core end processing":"2x (20 ... 16)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/51979bf58a25c0e0d2d6ac38829c4bd7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=74199&mlfb=3RW4434-6BC34"},"ai":{"faq":[{"question":"What is the rated current of the 3RW4434-6BC34 at different temperatures?","answer":"Rated current is 196 A at 40 °C, derating to 173 A at 50 °C and 152 A at 60 °C. Panel ambient temperature determines the continuous current the unit can deliver."},{"question":"Does the 3RW4434-6BC34 include a bypass contactor?","answer":"Yes, the integrated bypass contact system shorts the thyristors after the motor reaches speed, eliminating semiconductor losses during run."},{"question":"What compliance documentation does Siemens provide for the 3RW4434-6BC34?","answer":"The soft starter carries pollution degree 3 per IEC 60947-4-2. Standard Siemens documentation includes CE, UKCA, and EAC declarations; UL and CSA listings are available per variant. Specific certs can be confirmed at quote time."},{"question":"How can I order the 3RW4434-6BC34 or check availability?","answer":"Submit an RFQ for current pricing and lead time confirmation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4434-6BC34","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/3RW4434-6BC34 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}}