{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4445-6BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4445-6BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4445-6BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4445-6BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4445-6BC46 soft starter, 542 A at 40 °C, 690 V insulation voltage, 50/60 Hz, inside-delta circuit, integrated motor overload protection, screw fixing, 298 mm depth.","salesMarkdown":"## 542 A at 40 °C — sizing this soft starter to the motor FLA The 3RW4445-6BC46 is rated 542 A at 40 °C ambient. That is the continuous current rating at the standard 40 °C derating point — size it so the motor full-load amps sit at or below this figure for standard duty. In a 50 °C panel the rating drops to 485 A; at 60 °C it is 433 A. ## Inside-delta wiring and overload protection This soft starter supports inside-delta circuit configuration, which reduces the current through the thyristors to 58% of the line current — useful when the motor is oversized for the soft starter's line rating. Integrated motor overload protection means no separate overload relay is needed in the motor branch circuit. Adjustable current limitation sets the maximum inrush during start, and the minimum load is 8%, so it handles lightly loaded motors without nuisance tripping. ## Wiring and panel fit Main circuit wiring accepts stranded 70–240 mm², finely stranded 50–240 mm², or AWG 2/0–500 kcmil. The main current circuit uses busbar connection — typical for this current class. Physical dimensions: 298 mm deep, 210 mm wide, 230 mm high. Clearance: 100 mm above, 75 mm below, 5 mm at the sides. ## Environmental and compliance Operating ambient up to 60 °C; storage range -25 to +80 °C. The thyristor-based design includes intrinsic device protection against overtemperature and internal faults. An external reset input allows remote fault recovery. The onboard display shows fault signals for local diagnostics. Maximum motor cable length is 500 m.","metaTitle":"Siemens 3RW4445-6BC46 SIRIUS Soft Starter, 542 A, 690 V","metaDescription":"Siemens 3RW4445-6BC46 SIRIUS soft starter rated 542 A at 40 °C, 690 V insulation voltage. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"298mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"210mm","title":"3RW4445-6BC46","Height":"230mm","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: 313 A, 315 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 >>3RW5545-6HA16<<","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":"542A","at 50 °C rated value":"485A","at 60 °C rated value":"433A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Using Both Clamping Points":"min. 2x 2/0, max. 2x 500 kcmil","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"250 ... 500 kcmil","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"3/0 ... 600 kcmil","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":"200kW","at standard circuit at 50 °C rated value":"250hp","Finely Stranded Without Core End Processing":"min. 2x 50 mm², max. 2x 185 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":"355kW","at inside-delta circuit at 50 °C rated value":"500hp","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":"315kW","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":"145W","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":"62A","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/a65884abfaf22381ab57fea9fd1db8e5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=84772&mlfb=3RW4445-6BC46"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RW4445-6BC46?","answer":"Submit an RFQ for this part number. No stock-holding claim — quoted per order."},{"question":"What compliance documentation does Siemens provide for 3RW4445-6BC46?","answer":"The part carries pollution degree 3 per IEC 60947-4-2. Standard Siemens documentation includes a CE declaration of conformity and a UL/CSA file number — confirm the specific certification package with your order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4445-6BC46","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/3RW4445-6BC46 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}}