{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4436-2BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4436-2BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4436-2BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4436-2BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4436-2BC46 soft starter, 281 A at 40 °C, 690 V insulation voltage, inside-delta circuit, 50/60 Hz, IP00, screw fixing.","salesMarkdown":"## 281 A at 40 °C — derating drives the real limit The 3RW4436-2BC46: If the panel ambient runs above 40 °C, the continuous current ceiling drops — size the upstream protection and cabling for the derated figure, not the 40 °C number. Insulation voltage rated 690 V, so it comfortably handles 400/480 V systems with margin. Operating frequency 50…60 Hz — one part covers both line standards. ## Inside-delta circuit — line current savings Thyristor-based with inside-delta wiring. In an inside-delta configuration the soft starter connects in series with each motor winding rather than the supply lines, reducing the line current draw by roughly 42 % compared to a standard in-line connection. This lets a lower-rated starter handle the same motor — check the motor nameplate FLA and winding configuration before specifying. Adjustable current limitation and integrated motor overload protection reduce external component count in the panel. Pollution degree 3 per IEC 60947-4-2 means it's rated for industrial environments with conductive dust — no additional derating needed for typical factory-floor air. ## Panel fit — 200 x 170 x 270 mm, screw fixing Dimensions 200 mm height, 170 mm width, 270 mm depth. Fastened with screw fixing; mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front/back — useful for tight enclosures where the backplane angle is non-ideal. Main circuit connection via busbar or stranded cable 25…120 mm², finely stranded 16…95 mm², or kcmil 4…250. Auxiliary contacts accept 2x (24…16) AWG. Clearance: 100 mm upwards, 75 mm downwards, 5 mm at the side — plan the enclosure layout accordingly. ## Fault indication and reset External reset input and a display for fault signal — the display shows the fault code directly on the unit, so you don't need a laptop to read the trip cause. Wire length maximum 500 m for remote start/stop signals.","metaTitle":"Siemens 3RW4436-2BC46 SIRIUS Soft Starter, 281 A, 690 V","metaDescription":"Siemens 3RW4436-2BC46 SIRIUS soft starter, 281 A at 40 °C, 690 V insulation voltage, inside-delta circuit, active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"170mm","title":"3RW4436-2BC46","Height":"200mm","Upwards":"100mm","Stranded":"25 ... 120 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 690 V, 40 °C standard: 162 A, 160 kW Inside-delta: only up to 600 V 400-690 V AC, 230 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5536-2HA16<<","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":"230V","at 60 Hz rated value":"230V","at 40 °C rated value":"281A","at 50 °C rated value":"251A","at 60 °C rated value":"217A","For Auxiliary Contacts":"2x (24 ... 16)","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","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":"spring-loaded 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 (0.25 ... 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":"110kW","at standard circuit at 50 °C rated value":"125hp","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":"200kW","at inside-delta circuit at 50 °C rated value":"250hp","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","touch protection on the front acc. to IEC 60529":"finger-safe, for vertical contact from the front with box terminal/cover","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":"160kW","protection class IP on the front acc. to IEC 60529":"IP00; IP20 with box terminal/cover","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%","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":"95W","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":"32A","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/529a936599b61299e6940197a7e5ac28.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=511609&mlfb=3RW4436-2BC46"},"ai":{"faq":[{"question":"What is the 3RW4436-2BC46's rated current at different temperatures?","answer":"281 A at 40 °C, 251 A at 50 °C, and 217 A at 60 °C ambient. Use the derated value for the actual panel temperature to size upstream protection."},{"question":"Does the 3RW4436-2BC46 support inside-delta wiring?","answer":"Yes, it is designed for inside-delta circuit connection, which reduces line current by roughly 42 % compared to standard in-line connection. Verify the motor winding configuration before specifying."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4436-2BC46","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/3RW4436-2BC46 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}}