{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4422-3BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4422-3BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4422-3BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4422-3BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4422-3BC46, 50 A at 40 °C, 690 V insulation voltage, integrated bypass, screw fixing.","salesMarkdown":"## What this SIRIUS soft starter delivers It handles three-phase induction motors across 50 to 60 Hz, using thyristor-based voltage ramp control to limit inrush current during start-up. The integrated bypass contact system switches the thyristors out once the motor is at speed, eliminating heat dissipation from the power semiconductors during run — a key difference from a straight solid-state starter. The 50 A rating holds up to 40 °C ambient. Above that, derate to 45 A at 50 °C and 40 A at 60 °C. Maximum operating temperature is 60 °C; storage range is -25 to +80 °C. ## Motor protection and control features Built-in motor overload protection and intrinsic device protection are standard. The adjustable current limitation lets you set the start current between 8% and 100% of the motor FLA — useful for soft-starting conveyors or pumps where a hard start would jerk the load. An external reset input and a fault display (with display) simplify remote diagnostics. The inside-delta circuit wiring option reduces the current through the thyristors by about 42%, letting a smaller soft starter handle a given motor — check if your motor's terminal box supports six-wire delta connection before specifying this mode. Mounts via screw fixing on a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. Clearance requirements: 100 mm above, 75 mm below, 5 mm to the side — tight side clearance helps in a crowded panel. Main circuit terminals are box lugs accepting 2x (10 AWG to 1/0) using both clamping points, or 10 AWG to 1/0 using front or back clamping point singly. Stranded wire range is 2x (4 to 50 mm²). Auxiliary and control circuits use spring-loaded terminals for 2x (24 to 16 AWG). Solid wire for aux circuits is 2x (0.25 to 1.5 mm²). Maximum motor cable length is 500 m — long enough for most plant-floor runs, but watch voltage drop at full load.","metaTitle":"Siemens SIRIUS 3RW4422-3BC46 Soft Starter, 50A at 40°C","metaDescription":"Siemens SIRIUS 3RW4422-3BC46 soft starter, 50A rated at 40°C, 690V insulation voltage. Integrated bypass, motor overload protection, adjustable current limit. Current production.","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","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","During Storage":"-25 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","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":"50A","at 50 °C rated value":"45A","at 60 °C rated value":"40A","For Auxiliary Contacts":"2x (24 ... 16)","For Main Current Circuit":"box terminal","Motor Overload Protection":"Yes","Using Both Clamping Points":"2x (10 ... 1/0)","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"10 ... 2/0","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"10 ... 2/0","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":"18.5kW","at standard circuit at 50 °C rated value":"20hp","Finely Stranded Without Core End Processing":"2x (4 ... 35 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":"30kW","at inside-delta circuit at 50 °C rated value":"40hp","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":"30kW","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":"8W","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":"5A","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":"$1,869.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=178594&mlfb=3RW4422-3BC46","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4422-3BC46/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The headline rating is 50 A at 40 °C, derating to 45 A at 50 °C and 40 A at 60 °C. Insulation voltage is 690 V. Operating frequency is 50 to 60 Hz. Control supply voltage is 230 V at both 50 Hz and 60 Hz."},{"question":"Does this soft starter include an integrated bypass?","answer":"Yes, the integrated bypass contact system is standard. It shorts out the thyristors after start-up, so the power semiconductors do not dissipate heat during continuous run."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4422-3BC46","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/3RW4422-3BC46 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}