{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4046-1BB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4046-1BB15","canonicalUrl":"https://aoctrl.com/siemens/3RW4046-1BB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4046-1BB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4046-1BB15 soft starter, Size S3, 80 A at 40 °C, 110-230 VDC control, screw terminals, active production.","salesMarkdown":"## 80 A at 40 °C — the rating that decides the motor The 3RW4046-1BB15 is a SIRIUS S3 soft starter rated 80 A at 40 °C ambient. That 80 A is the continuous current at the device terminals, not the motor nameplate FLA — you size the soft starter so the motor's full-load amps at the actual panel ambient stay below this figure. If the panel runs warm — say 50 °C inside — a 75 A motor is already at the derated limit. The control supply is 110-230 VDC. That is not the common 24 VDC found on many PLC-driven panels; verify the control transformer voltage before wiring. The operating frequency range is 50-60 Hz, so it works on either mains standard without adjustment. ## Mounting and clearance — the panel layout constraints Mounting is screw and snap-on onto DIN rail. The device is 70 mm wide, 170 mm tall, 190 mm deep. Clearance around the unit is specified: 60 mm above, 40 mm below, 30 mm at the sides. Skimp on the top clearance and you choke the convection cooling that supports the 80 A rating. Mounting position is restricted: with the optional fan, the unit can be rotated ±90° on a vertical surface and tilted ±22.5° front/back. Without the fan, rotation and tilt are limited to ±10°. For a retrofit into an existing panel, check that the orientation falls within these limits — mounting it flat on a horizontal surface is not allowed. ## Terminal capacity and wiring That covers most motor feeds up to 80 A without needing a separate terminal block. Auxiliary terminals accept 2x (20-14 AWG). The maximum wire length to the motor is 300 m — beyond that, capacitive charging current from the cable can cause nuisance tripping on the soft starter's internal protection. ## Protection and adjustability Built-in motor overload protection is standard, so you can skip an external overload relay in many installations. Adjustable current limitation lets you set the starting current between 20% and 100% of the device rating — useful for limiting mechanical shock on the driven load. The minimum load is 20% of the rated current; below that the soft starter may not detect the motor correctly. Pollution degree 3 per IEC 60947-4-2 means it is rated for industrial environments with conductive dust or occasional condensation — typical for a motor control center in a factory.","metaTitle":"Siemens 3RW4046-1BB15 SIRIUS Soft Starter, 80A, 40°C","metaDescription":"Siemens 3RW4046-1BB15 SIRIUS S3 soft starter, 80A at 40°C, 110-230 VDC control, active production. Quoted to order against BOM. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"190mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"70mm","title":"3RW4046-1BB15","Height":"170mm","Upwards":"60mm","Stranded":"2x (10 ... 70 mm²)","Downwards":"40mm","Thyristors":"Yes","At The Side":"30mm","description":"SIRIUS soft starter S3 80 A, 55 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC Screw terminals","During Storage":"-40 ... +80°C","External Reset":"Yes","Finely Stranded":"2 x (10 ... 50 mm²)","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","For Main Contacts":"2x (7 ... 1/0)","Mounting Position":"With additional fan: With vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back Without additional fan: With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° t","Product Brand Name":"SIRIUS","Degree Of Pollution":"3, acc. to IEC 60947-4-2","Product Designation":"Soft starter","Wire Length Maximum":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 40 °C rated value":"80A","at 50 °C rated value":"73A","at 60 °C rated value":"66A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"screw-type terminals","Motor Overload Protection":"Yes","Using Both Clamping Points":"10 ... 2/0","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S3","Using The Back Clamping Point":"2x (10 ... 1/0)","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"2x (10 ... 1/0)","control supply voltage 1 at DC":"110 ... 230V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"screw-type terminals","Product Component Motor Brake Output":"No","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","control supply voltage 1 at AC at 50 Hz":"110 ... 230V","control supply voltage 1 at AC at 60 Hz":"110 ... 230V","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":"No","at standard circuit at 40 °C rated value":"55kW","at standard circuit at 50 °C rated value":"60hp","number of CO contacts for auxiliary contacts":"1","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC/DC","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","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 at DC":"-15%","relative positive tolerance of the control supply voltage at DC":"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":"12W","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":"43A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$850.90","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/699c42ee4ed3fda6d13a788942e39762.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=681&mlfb=3RW4046-1BB15"},"ai":{"faq":[{"question":"What is the 3RW4046-1BB15's current rating at different ambient temperatures?","answer":"The soft starter is rated 80 A at 40 °C, derating to 73 A at 50 °C and 66 A at 60 °C. The derating temperature threshold is 40 °C. For a panel that runs at 50 °C, the usable current is 73 A, not the headline 80 A."},{"question":"What clearance is needed around the 3RW4046-1BB15 for cooling?","answer":"Siemens specifies 60 mm clearance above, 40 mm below, and 30 mm at the sides. The device dimensions are 70 mm wide, 170 mm tall, and 190 mm deep. The top clearance is the most critical for convection cooling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4046-1BB15","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/3RW4046-1BB15 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}}