{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW3026-2BB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW3026-2BB04","canonicalUrl":"https://aoctrl.com/siemens/3RW3026-2BB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW3026-2BB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW3026-2BB04 soft starter, 25 A at 40 °C, 600 V insulation voltage, S0 frame size, 45 mm width, spring-loaded terminals, integrated bypass.","salesMarkdown":"The 3RW3026-2BB04 is a SIRIUS-brand soft starter in the S0 frame size, rated 25 A continuous at 40 °C. Insulation voltage is 600 V, so it covers 400/480 V systems with headroom. The integrated bypass contactor means no external bypass relay is needed — the thyristors are shorted after start, eliminating SCR heat dissipation during run. Minimum load is 10 % of rated current, so it cannot soft-start a motor drawing less than 2.5 A. Control voltage is 24 V AC/DC, matching standard industrial supplies. The unit operates on 50 or 60 Hz without derating. ## Spring-loaded terminals, 45 mm wide — panel fit Main and control circuits use spring-loaded terminals — tool-less wiring for solid or ferruled stranded conductors, resistant to vibration loosening. The main circuit accepts 16 to 8 AWG; auxiliary and control terminals accept 24 to 14 AWG. The S0 frame is 45 mm wide, 150 mm deep, and 150 mm high. Mounting is by screw or snap-on onto a DIN rail. Clearance requirements: 60 mm above, 40 mm below, 15 mm at the sides — needed for ventilation and wiring access. Pollution degree 3 per IEC 60947-4-2 suits industrial panel environments with conductive dust or moisture. Maximum motor cable length is 300 m — beyond that, output filter or ferrite may be needed to prevent reflected-wave damage to motor insulation. ## No overload relay, no current limit — external protection required The 3RW3026-2BB04 does not include motor overload protection, intrinsic device protection, or adjustable current limitation. A separate overload relay (e.g., Siemens 3RU2 or 3RB3) must be wired in series for thermal motor protection. This is standard for basic soft starters — the trade-off is lower cost and smaller footprint versus all-in-one starters.","metaTitle":"Siemens 3RW3026-2BB04 Soft Starter, 25A, S0 Frame, 600V","metaDescription":"Siemens SIRIUS 3RW3026-2BB04 soft starter, 25A at 40°C, 600V insulation, S0 frame, DIN-rail mount. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"150mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45mm","title":"3RW3026-2BB04","Height":"150mm","Upwards":"60mm","Downwards":"40mm","Thyristors":"Yes","At The Side":"15mm","description":"SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals","During Storage":"-40 ... +80°C","External Reset":"No","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"10%","For Main Contacts":"16 ... 8","Mounting Position":"With vertical mounting surface +/-10° rotatable, with vertical mounting surface +/- 10° 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":"300m","Derating Temperature":"40°C","Inside-Delta Circuit":"No","at 50 Hz rated value":"24V","at 60 Hz rated value":"24V","at 40 °C rated value":"25A","at 50 °C rated value":"23A","at 60 °C rated value":"21A","For Auxiliary Contacts":"2x (24 ... 14)","For Main Current Circuit":"spring-loaded terminals","Motor Overload Protection":"No","Intrinsic Device Protection":"No","Adjustable Current Limitation":"No","Size Of Engine Control Device":"S0","Insulation Voltage Rated Value":"600V","Using The Front Clamping Point":"1x 8, 2x (16 ... 10)","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"red","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded 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 (0.25 ... 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":"11kW","at standard circuit at 50 °C rated value":"15hp","control supply voltage 1 at DC rated value":"24V","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"1","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":"200 ... 480V","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%","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":"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%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/304fb784fb3f28c73829bc10bc42a96c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=136400&mlfb=3RW3026-2BB04"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RW3026-2BB04?","answer":"The product is designed to IEC 60947-4-2 (pollution degree 3). Siemens typically provides CE, UKCA, and UL/CSA declarations for the SIRIUS line; check the product certificate bundle for the specific approvals applicable to your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW3026-2BB04","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/3RW3026-2BB04 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}