{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4426-1BC45","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4426-1BC45","canonicalUrl":"https://aoctrl.com/siemens/3RW4426-1BC45","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4426-1BC45","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4426-1BC45, 133 A at 40 °C, 690 V insulation voltage, integrated bypass contact system, inside-delta capable.","salesMarkdown":"The Siemens 3RW4426-1BC45 is a SIRIUS-brand soft starter, rated 133 A at 40 °C (derated to 118 A at 50 °C and 102 A at 60 °C), with an insulation voltage of 690 V and operating frequency of 50 to 60 Hz. It includes an integrated bypass contact system and supports inside-delta wiring. The thyristor-based ramp-up and adjustable current limitation let you tune the starting torque to the load — pumps, fans, conveyors — without the mechanical shock of a direct-on-line start. Minimum load is 8% of the rated current, so it handles lightly loaded motors without nuisance tripping. Fastening is screw fixing; the unit measures 192 mm high, 170 mm wide, and 270 mm deep. Clearances: 100 mm above, 75 mm below, 5 mm at the sides. Storage temperature -25 to +80 °C; during operation the ambient limit is 60 °C, with derating starting at 40 °C. Main current circuit uses box terminals accepting stranded 2x (4 to 50 mm²) and solid 2x (0.5 to 2.5 mm²). The back and front clamping points each accept 10 to 2/0 AWG. Auxiliary and control circuits use screw-type terminals for 2x (20 to 14 AWG). Maximum wire length to the motor is 500 m — enough for remote pumps but watch voltage drop at full load. ## Protection and diagnostics Motor overload protection and intrinsic device protection are built in — no separate overload relay needed in most installations. An external reset input and a display for fault signals speed up troubleshooting on the line. The integrated bypass contact system also reduces heat dissipation in the panel after the motor reaches full speed.","metaTitle":"Siemens 3RW4426-1BC45 SIRIUS Soft Starter, 133 A, 690 V","metaDescription":"Siemens 3RW4426-1BC45 SIRIUS soft starter, 133 A at 40 °C, 690 V insulation voltage, integrated bypass, inside-delta. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.5 ... 2.5 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":"133A","at 50 °C rated value":"118A","at 60 °C rated value":"102A","For Auxiliary Contacts":"2x (20 ... 14)","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":"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":"45kW","at standard circuit at 50 °C rated value":"50hp","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":"90kW","at inside-delta circuit at 50 °C rated value":"100hp","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","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":"45W","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":"15A","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":"$4,085.59","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=171347&mlfb=3RW4426-1BC45","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4426-1BC45/alternatives.json"},"ai":{"faq":[{"question":"What is 3RW4426-1BC45's listed solid conductor capacity?","answer":"The solid conductor terminals accept 2x (0.5 to 2.5 mm²) for the main current circuit. For stranded wire, the range is 2x (4 to 50 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4426-1BC45","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/3RW4426-1BC45 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}}