{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4455-6BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4455-6BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4455-6BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4455-6BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4455-6BC46 soft starter, 1200 A at 40 °C, 690 V insulation voltage, inside-delta circuit capable, integrated bypass contact system, current production.","salesMarkdown":"## What the 1200 A rating means for your motor load The Siemens 3RW4455-6BC46 is a SIRIUS soft starter rated 1200 A at 40 °C — that's the full-load current it handles in standard duty, not a surge rating. The 690 V insulation voltage (rated value) means it's built for 400 V and 480 V line supplies with headroom; pollution degree 3 per IEC 60947-4-2 confirms it tolerates the conductive dust and humidity typical of industrial enclosures without conformal coating. Inside-delta wiring is supported, which cuts the current seen by each thyristor pair to 58% of the line current — useful for squeezing a 1200 A motor start out of a physically smaller unit. The integrated bypass contact system closes after the start ramp, taking the thyristors out of the circuit so they don't dissipate heat during continuous run; that keeps the enclosure cooler and extends the semiconductor life. ## Mounting and wiring — what fits in the panel The unit measures 640 mm high by 510 mm wide by 290 mm deep, with screw fixing to the mounting surface. It's not a DIN-rail snap-on; plan for a dedicated backplate. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides. For storage, the range is -25 to +80 °C; during operation the ambient limit is 60 °C. Main current circuit connection is via busbar, not cable lugs — order the appropriate busbar kit separately. The main contact terminals accept 2/0 to 500 kcmil or 70 to 240 mm² stranded, 50 to 240 mm² finely stranded. Auxiliary and control wiring uses screw-type terminals accepting 2x (0.5 to 2.5 mm²) solid or 2x (20 to 14 AWG). Maximum motor cable length is 500 m; beyond that, reflected wave spikes on long leads may need an output reactor. ## Control and protection features Motor overload protection and intrinsic device protection (thyristor overtemperature, phase imbalance, etc.) are built in — no separate overload relay needed. Adjustable current limitation lets you set the start current between 8% and 100% of the rated motor current. An external reset input allows remote fault clearing, and the display shows fault codes directly. A motor brake output is included as a product component, so you can control the brake coil through the soft starter without an extra contactor. The operating frequency range is 50 to 60 Hz, with the control supply rated 230 V at both 50 Hz and 60 Hz. The minimum load is 8% of the rated current.","metaTitle":"Siemens 3RW4455-6BC46 SIRIUS Soft Starter, 1200 A, 690 V","metaDescription":"Siemens 3RW4455-6BC46 SIRIUS soft starter, 1200 A at 40 °C, 690 V insulation. Current production. Inside-delta capable with integrated bypass.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"290mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"510mm","title":"3RW4455-6BC46","Height":"640mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 690 V, 40 °C standard: 693 A, 710 kW Inside-delta: only up to 600 V 400-690 V AC, 230 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5553-6HA16<<","During Storage":"-25 ... +80°C","External Reset":"Yes","Finely Stranded":"50 ... 240 mm²","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","For Main Contacts":"2/0 ... 500 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":"230V","at 60 Hz rated value":"230V","at 40 °C rated value":"1 200A","at 50 °C rated value":"1 065A","at 60 °C rated value":"954A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Insulation Voltage Rated Value":"690V","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":"500kW","at standard circuit at 50 °C rated value":"700hp","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":"800kW","at inside-delta circuit at 50 °C rated value":"1 200hp","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 ... 690V","at 690 V at standard circuit at 40 °C rated value":"710kW","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"400 ... 600V","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":"220W","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":"138A","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7dcfcba355f829aa40b7be1f196e95c5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=508222&mlfb=3RW4455-6BC46"},"ai":{"faq":[{"question":"What control voltage does 3RW4455-6BC46 require?","answer":"The control supply is rated 230 V at both 50 Hz and 60 Hz. The operating frequency range is 50 to 60 Hz."},{"question":"Where can I buy 3RW4455-6BC46?","answer":"This part is sourced to order against your RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4455-6BC46","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/3RW4455-6BC46 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}