{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4454-2BC44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4454-2BC44","canonicalUrl":"https://aoctrl.com/siemens/3RW4454-2BC44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4454-2BC44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4454-2BC44 soft starter, 1065 A at 40 °C, 690 V insulation voltage, 50/60 Hz, thyristor-based with integrated bypass, screw fixing, pollution degree 3.","salesMarkdown":"## 1065 A at 40 °C — thermal derating drives the panel design The 3RW4454-2BC44: That 20 % loss between 40 °C and 60 °C is the dimensioning constraint for any enclosure without forced ventilation — the panel designer sizes the gland plate and busbar clearance around the 40 °C figure, not the 60 °C ceiling. Thyristor-based switching with an integrated bypass contact system means the silicon handles the acceleration ramp only; once at speed the bypass closes, eliminating SCR conduction losses for the run duration. This keeps the internal temperature rise within the 60 °C operating limit during continuous duty. ## Mounting position and clearances — vertical surface, 100 mm above, 75 mm below Mounts on a vertical surface with ±90° rotation and ±22.5° tilt front/back. Minimum clearance above is 100 mm, below 75 mm, and 5 mm at the sides — these are not suggestions; the 640 mm height and 510 mm width mean a standard 800 mm × 600 mm enclosure backplate leaves only the vertical margins for cable bending radius and airflow. Screw fixing to the backplate, not DIN-rail snap-on. The 290 mm depth plus busbar connection for the main current circuit means the door clearance and gland-plate entry angle need checking before the panel layout is locked. ## Motor protection and wiring — 8 % minimum load, inside-delta ready Motor overload protection and intrinsic device protection are built in, with adjustable current limitation. The minimum load is 8 % of the rated current — this matters when the downstream motor is oversized for the actual pump or fan load; below 8 % the soft starter may not detect the load correctly and the protection thresholds lose accuracy. Inside-delta wiring is supported, which reduces the line current by a factor of √3 compared to standard in-line connection. For a 1065 A unit this can drop the upstream cable and contactor rating to roughly 615 A, a real saving on copper and panel space. Pollution degree 3 per IEC 60947-4-2 means it is rated for conductive dust or occasional condensation typical of industrial switchrooms and motor control centres — not clean-room or climate-controlled electrical rooms. The 690 V rated insulation voltage and 50/60 Hz operating frequency cover standard European and North American distribution voltages without derating.","metaTitle":"Siemens 3RW4454-2BC44 SIRIUS Soft Starter, 1065 A at 40 °C","metaDescription":"Siemens 3RW4454-2BC44 SIRIUS soft starter, 1065 A at 40 °C, 690 V insulation, integrated bypass, active production. Quoted to order against BOM.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"290mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"510mm","title":"3RW4454-2BC44","Height":"640mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 400 V, 40 °C standard: 615 A, 355 kW Inside-delta: 1065 A, 630 kW 200-460 V AC, 230 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5552-2HA14<<","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 065A","at 50 °C rated value":"954A","at 60 °C rated value":"847A","For Auxiliary Contacts":"2x (24 ... 16)","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":"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":"355kW","at standard circuit at 50 °C rated value":"450hp","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":"630kW","at inside-delta circuit at 50 °C rated value":"850hp","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":"186W","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":"123A","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/df031ba333e74b9503c68bc119f259d9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=513629&mlfb=3RW4454-2BC44"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 3RW4454-2BC44?","answer":"The soft starter is designed to IEC 60947-4-2 for pollution degree 3 environments. Documentation typically includes the CE declaration of conformity, RoHS and REACH compliance statements, and the product manual. Specific certs (UL, CSA, EAC) should be confirmed at RFQ as they vary by production batch and target market."},{"question":"What is the 3RW4454-2BC44's depth for panel layout?","answer":"The depth is 290 mm. Combined with the 640 mm height and 510 mm width, this requires a minimum enclosure depth of about 350 mm to allow for the busbar connection and cable bending radius at the rear."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4454-2BC44","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/3RW4454-2BC44 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}}