{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4435-6BC34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4435-6BC34","canonicalUrl":"https://aoctrl.com/siemens/3RW4435-6BC34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4435-6BC34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4435-6BC34 soft starter, 232 A at 40 °C, 690 V insulation voltage, 50/60 Hz, screw fixing, IP20, 170 x 200 x 270 mm.","salesMarkdown":"## 232 A at 40 °C — the thermal derating drives the motor match The 3RW4435-6BC34: That derating curve is the first check against your motor FLA and enclosure ambient — a panel that runs at 50 °C knocks 29 A off the headline figure. Insulation voltage is 690 V, so it sits comfortably on 400/480 V systems with headroom. Operating frequency covers 50 to 60 Hz — one part number for global installs. Inside-delta circuit wiring is supported, which reduces the line current by about 42% compared to a standard in-line connection — useful when the motor is wired in delta and you want a smaller soft starter frame. ## Terminal ranges and what fits in the box Main circuit terminals accept stranded 25–120 mm² or finely stranded 16–95 mm², plus 4–250 kcmil for North American builds. The busbar connection option is listed for the main current circuit — no lug crimping needed if the panel uses bus. The clamping points are screw-type, with front and back options accepting 6–2/0 AWG each. Maximum motor cable length is 500 m — long enough for most conveyor and pump runs without a output reactor, but check the cable capacitance against the thyristor dv/dt if you push that limit. ## Panel fit and mounting flexibility Dimensions are 170 mm wide, 200 mm high, 270 mm deep — screw fixing to the mounting surface. Clearance above is 100 mm, below 75 mm, and 5 mm at the sides for airflow and wiring access. Mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front-to-back — flexibility for tight enclosures or angled backplates. ## Protection and diagnostics built in Motor overload protection is integrated — no separate overload relay needed for the soft starter branch. Adjustable current limitation lets you set the start current between 8% and 100% of the rated current. Intrinsic device protection covers the thyristors against overtemperature and phase loss. External reset input allows remote clearing of faults from a PLC or pushbutton station. A local display shows fault signals — no need to wire a separate HMI for basic diagnostics on the line. The 3RW4435-6BC34 is a SIRIUS series soft starter, the standard industrial line from Siemens for motor starting applications. Compliance documentation includes IEC 60947-4-2 for the soft starter standard, pollution degree 3 rating, and the usual Siemens declarations (CE, UKCA, EAC) — these are provided with the shipment or on request.","metaTitle":"Siemens 3RW4435-6BC34 SIRIUS Soft Starter, 232 A at 40 °C","metaDescription":"Siemens 3RW4435-6BC34 SIRIUS soft starter rated 232 A at 40 °C, 690 V insulation, 50/60 Hz. 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":"3RW4435-6BC34","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: 117 A, 75 hp Inside-delta: 203 A, 150 hp 200-460 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5535-6HA14<<","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%","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":"232A","at 50 °C rated value":"203A","at 60 °C rated value":"173A","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","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":"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","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":"75kW","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":"132kW","at inside-delta circuit at 50 °C rated value":"150hp","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%","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":"76W","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":"26A","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":"$5,157.47","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f61836451ffec6dc3a6c48bf7780a9a5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=100990&mlfb=3RW4435-6BC34"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RW4435-6BC34?","answer":"Submit an RFQ through this listing."},{"question":"What is the maximum motor cable length for this soft starter?","answer":"The maximum motor cable length is 500 m. For runs approaching that limit, verify the cable capacitance against the thyristor dv/dt rating to avoid nuisance tripping."},{"question":"Does the 3RW4435-6BC34 include motor overload protection?","answer":"Yes, motor overload protection is integrated into the soft starter. No separate overload relay is required for the motor branch circuit when using this device."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4435-6BC34","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/3RW4435-6BC34 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}}