{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4075-6BB34","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4075-6BB34","canonicalUrl":"https://aoctrl.com/siemens/3RW4075-6BB34","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4075-6BB34","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4075-6BB34 soft starter, Size S12, 356 A at 40 °C, 50/60 Hz, 600 V insulation voltage, screw fixing, busbar connection.","salesMarkdown":"## Motor starting duty and current ratings The 3RW4075-6BB34: The 20% minimum load threshold means this unit won't regulate properly below that current level — don't oversize it for a motor that runs well under 20% of the soft starter's rating. Integrated motor overload protection and adjustable current limitation let it serve as both starter and protector in one device, saving a panel row and the wiring between a separate overload relay. ## Panel integration and mounting constraints Size S12 frame measures 230 mm high, 160 mm wide, 278 mm deep — the depth is the dimension to watch when laying out a deep cabinet against a back panel or gland plate. Screw fixing to the mounting surface; the mounting position is restricted to vertical surface with ±10° rotation and ±10° tilt without an additional fan, or ±90° rotation and ±22.5° tilt with one. Clearance requirements: 100 mm above, 75 mm below, 5 mm at the sides — the top clearance is the binding constraint for airflow and cable bend radius. ## Wiring terminations and conductor sizes Main current circuit uses busbar connection with a front clamping point accepting 3/0 to 600 kcmil and a back clamping point for 250 to 500 kcmil — the busbar approach handles the 356 A continuous current without the voltage drop of a lugged cable. Stranded main power cables: 70 to 240 mm²; finely stranded: 50 to 240 mm²; AWG/kcmil equivalents: 2/0 to 500 kcmil using both clamping points. ## Environmental and compliance profile Insulation voltage rated 600 V, operating frequency 50/60 Hz — the 600 V rating covers 480 V and 575 V systems with margin. ## Sourcing and lifecycle status The SIRIUS product brand means full Siemens documentation and support apply.","metaTitle":"Siemens 3RW4075-6BB34 SIRIUS Soft Starter, 356 A, Size S12","metaDescription":"Siemens 3RW4075-6BB34 SIRIUS soft starter, 356 A at 40°C, Size S12 frame, 50/60 Hz. 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":"278mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"160mm","title":"3RW4075-6BB34","Height":"230mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter S12 315 A, 250 hp/460 V, 50 °C 200-460 V AC, 115 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5075-6AB14<<","During Storage":"-40 ... +80°C","External Reset":"Yes","Finely Stranded":"50 ... 240 mm²","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw fixing","Minimum Load [%]":"20%","For Main Contacts":"2/0 ... 500 kcmil","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 50 Hz rated value":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"356A","at 50 °C rated value":"315A","at 60 °C rated value":"280A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Using Both Clamping Points":"min. 2x 2/0, max. 2x 500 kcmil","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Size Of Engine Control Device":"S12","Using The Back Clamping Point":"250 ... 500 kcmil","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"3/0 ... 600 kcmil","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","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":"200kW","at standard circuit at 50 °C rated value":"250hp","Finely Stranded Without Core End Processing":"min. 2x 50 mm², max. 2x 185 mm²","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","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":"200 ... 460V","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 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":"125W","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":"131A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6,901.60","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6cacf603b54337fead037041a0d52083.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=475905&mlfb=3RW4075-6BB34"},"ai":{"faq":[{"question":"What is 3RW4075-6BB34's listed depth for panel layout?","answer":"The depth is 278 mm, with a height of 230 mm and width of 160 mm. Clearance requirements are 100 mm above, 75 mm below, and 5 mm at the sides."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4075-6BB34","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/3RW4075-6BB34 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}}