{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4423-1BC35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4423-1BC35","canonicalUrl":"https://aoctrl.com/siemens/3RW4423-1BC35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4423-1BC35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter, 3RW4423-1BC35, 62 A (40 °C), 115 V AC control, integrated bypass, screw terminals.","salesMarkdown":"The Siemens 3RW4423-1BC35 is a SIRIUS soft starter, a thyristor-based motor controller that reduces inrush current during start-up and provides a controlled ramp-down for pumps, conveyors, and fans. It is rated for a motor current of 62 A at 40 °C, derating to 55 A at 50 °C and 50 A at 60 °C, so the ambient temperature in the enclosure directly governs the maximum motor you can hang on it. The control supply is 115 V at both 50 and 60 Hz, which matches standard North American control voltages. The integrated bypass contact system means that once the motor is up to speed, the thyristors are shorted out, eliminating heat dissipation in the soft starter during run — a critical factor for panel thermal management. The adjustable current limitation lets you set the start current between the minimum load of 8% and the full rated current, which is useful for soft-starting lightly loaded machines without oversizing the starter. Mounting is by screw fixing on a vertical surface, with the unit rotatable ±90° and tiltable ±22.5° forward and back, giving flexibility in panel layout. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides. The main circuit uses box terminals accepting 2x (4... 50 mm²) stranded or 2x (10... 1/0) AWG using both clamping points. The auxiliary and control circuit uses screw-type terminals for 2x (0.5... 2.5 mm²) solid. Maximum motor cable length is 500 m — long enough for most industrial runs but worth checking for distributed motor installations.","metaTitle":"Siemens 3RW4423-1BC35 SIRIUS Soft Starter, 62A, 115V Control","metaDescription":"Siemens SIRIUS 3RW4423-1BC35 soft starter, 62 A rated at 40 °C, 115 V control voltage, integrated bypass, adjustable current limit. Current production. RFQ for lead time.","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","title":"3RW4423-1BC35","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 575 V, 50 °C standard: 32 A, 25 hp Inside-delta: 55 A, 50 hp 400-600 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5517-1HA15<<","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":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"62A","at 50 °C rated value":"55A","at 60 °C rated value":"50A","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":"22kW","at standard circuit at 50 °C rated value":"25hp","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":"37kW","at inside-delta circuit at 50 °C rated value":"50hp","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":"10W","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":"7A","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","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f9f658b457cc378bd788e3628ca89b75.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=350777&mlfb=3RW4423-1BC35"},"ai":{"faq":[{"question":"What are the key ratings for this soft starter?","answer":"Rated motor current is 62 A at 40 °C, 55 A at 50 °C, 50 A at 60 °C. Control voltage is 115 V AC at 50/60 Hz. Insulation voltage is 690 V. It includes an integrated bypass and adjustable current limitation down to 8% load."},{"question":"What are the mounting dimensions and clearances?","answer":"Dimensions are 192 mm high, 170 mm wide, 270 mm deep. Required clearances: 100 mm above, 75 mm below, 5 mm at the sides."},{"question":"What terminal types does it use?","answer":"Main circuit uses box terminals for 2x (4... 50 mm²) stranded or 2x (10... 1/0) AWG. Auxiliary and control circuit uses screw-type terminals for 2x (0.5... 2.5 mm²) solid."},{"question":"Does it have an integrated bypass?","answer":"Yes, the integrated bypass contact system shorts the thyristors during run, reducing heat dissipation in the panel."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4423-1BC35","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/3RW4423-1BC35 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}}