{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4454-6BC35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4454-6BC35","canonicalUrl":"https://aoctrl.com/siemens/3RW4454-6BC35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4454-6BC35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4454-6BC35 soft starter, 1065 A at 40 °C, 690 V insulation voltage, 50/60 Hz, integrated bypass, inside-delta circuit, screw fixing.","salesMarkdown":"## 1065 A at 40 °C — the real-world current rating The 3RW4454-6BC35: That derating curve is what you size the starter against, not the headline 1065 A — if your panel ambient runs at 50 °C, the usable current drops 10 %. Insulation voltage is rated 690 V, operating frequency 50/60 Hz at 115 V control supply. The 8 % minimum load setting means it handles lightly-loaded motors without dropping out of starting mode. ## Integrated bypass and inside-delta topology Integrated bypass contact system means the thyristors are shorted out once the motor is up to speed — no continuous heat dissipation from the silicon stack during run. The thyristors themselves are rated for the start duty only, which keeps the enclosure size down. Inside-delta circuit wiring reduces the current the starter sees by about 42 % compared to standard in-line connection — a 1065 A starter wired inside-delta handles a motor that would otherwise need a ~1800 A unit. That saves panel space and busbar cost. ## Mounting and connection — panel integration Fastening method is screw fixing with a vertical mounting surface; the unit is rotatable ±90° and tiltable ±22.5° front/back. That gives flexibility for tight enclosures but means the mounting plate needs to carry the full 640 mm height × 510 mm width × 290 mm depth footprint. Main current circuit connects via busbar — the terminal range accepts stranded 70–240 mm², finely stranded 50–240 mm², and AWG 2/0–500 kcmil. Clearance distances: 100 mm upwards, 75 mm downwards, 5 mm at the sides. The 500 m maximum wire length to the motor sets a practical limit on drive-to-load distance — longer runs need a reactor or output filter. ## Protection and diagnostics — less external hardware needed Built-in motor overload protection, intrinsic device protection (over-temperature, phase loss), and adjustable current limitation. That means you can skip the separate overload relay in many panels — one less component to wire and set. Display for fault signals and external reset input. During commissioning, the display shows the fault code directly — no laptop needed to figure out why it tripped. Pollution degree 3 per IEC 60947-4-2 confirms it's rated for the dust and humidity of an industrial floor. ## Lifecycle and sourcing — current production Storage temperature range is -25 to +80 °C per IEC 60721 class 1K6 (occasional condensation, no salt mist, sand exclusion). Operating ambient during operation is 60 °C max, with derating starting at 40 °C.","metaTitle":"Siemens 3RW4454-6BC35 Soft Starter, 1065 A at 40 °C, SIRIUS","metaDescription":"Siemens 3RW4454-6BC35 SIRIUS soft starter, rated 1065 A at 40 °C. Active production, integrated bypass, inside-delta capable. Quoted to order against your BOM.","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":"3RW4454-6BC35","Height":"640mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 575 V, 50 °C standard: 551 A, 600 hp Inside-delta: 954 A, 1050 hp 400-600 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5552-6HA16<<","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":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"1 065A","at 50 °C rated value":"954A","at 60 °C rated value":"847A","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","during storage acc. to IEC 60721":"1K6 (only occasional condensation), 1C2 (no salt mist), 1S2 (sand must not get inside the devices), 1M4","For Auxiliary And Control Circuit":"screw-type terminals","during operation acc. 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 acc. to IEC 60721":"2K2, 2C1, 2S1, 2M2 (max. fall height 0.3 m)","Product Component Motor Brake Output":"Yes","reference code acc. to DIN EN 61346-2":"Q","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":"400kW","at standard circuit at 50 °C rated value":"600hp","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":"710kW","at inside-delta circuit at 50 °C rated value":"1 050hp","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 ... 600V","protection class IP on the front acc. to IEC 60529":"IP00","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":"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/d5edfe751bde8a16c8be3c59e44e3dbf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=324420&mlfb=3RW4454-6BC35"},"ai":{"faq":[{"question":"What is the 3RW4454-6BC35 used for?","answer":"It is a SIRIUS soft starter for three-phase induction motors, rated 1065 A at 40 °C. It reduces inrush current during motor start by ramping voltage through thyristors, then bypasses them with an integrated contactor for loss-free running. Typical applications include conveyors, pumps, compressors, and fans where mechanical shock and electrical stress need limiting."},{"question":"How can I order the 3RW4454-6BC35?","answer":"No stock-holding claim is made — each order is sourced per your requirement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4454-6BC35","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/3RW4454-6BC35 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}}