{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4026-2TB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4026-2TB04","canonicalUrl":"https://aoctrl.com/siemens/3RW4026-2TB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4026-2TB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4026-2TB04 soft starter, Size S0, 25 A at 40 °C, 50/60 Hz, 600 V insulation, spring-loaded terminals, integrated bypass, screw and snap-on mounting.","salesMarkdown":"The 3RW4026-2TB04: Spring-loaded terminals on both the main current circuit and the auxiliary/control circuit mean no screw torque to check; strip and insert solid or ferruled stranded wire up to 2.5 mm². Clearance: 60 mm above, 40 mm below, 15 mm at the side for airflow — the derating curve starts at 40 °C ambient, so pack the cabinet with that in mind. ## Current derating and the integrated bypass — what the 25 A rating actually means An integrated bypass contact system closes after start-up, shunting the thyristors and cutting heat dissipation in the cabinet during run — this is what lets the S0 frame handle 25 A continuous without a fan at 40 °C. Adjustable current limitation lets you set the start current between 20 % and 100 % of the soft starter's rated current, matching the motor's inrush characteristic without oversizing the starter. ## Active production — no end-of-life watch needed Motor overload protection and intrinsic device protection are built in — no separate overload relay needed for most applications, which simplifies the BOM and panel wiring. Insulation voltage rated 600 V, pollution degree 3 per IEC 60947-4-2 — suitable for industrial environments with conductive dust or condensation. ## Mounting position and cable length constraints With the optional fan, the unit can be mounted on a vertical surface and rotated ±90° or tilted ±22.5° front-to-back; without the fan, rotation is limited to ±10°. Maximum motor cable length is 300 m — beyond that, capacitive charging current from the cable can interfere with the thyristor firing and cause nuisance trips. External reset input and a red LED fault signal give the technician a clear indication and remote reset capability without opening the panel door.","metaTitle":"Siemens 3RW4026-2TB04 SIRIUS Soft Starter, 25 A, Size S0","metaDescription":"Siemens 3RW4026-2TB04 SIRIUS soft starter, 25 A at 40 °C, Size S0 frame, integrated bypass, spring-clamp terminals. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"155mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45mm","title":"3RW4026-2TB04","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 Thermistor motor protection","During Storage":"-40 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60°C","Fastening Method":"screw and snap-on mounting","Minimum Load [%]":"20%","For Main Contacts":"16 ... 10, 1x 8","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":"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":"Yes","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","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":"Yes","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":"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":"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":"-20%","relative positive tolerance of the control supply voltage at DC":"20%","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%","Adjustable Motor Current For Motor Overload Protection Minimum Rated Value":"10A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f3a6e0f79f39d6101805610d8c5db100.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=20464&mlfb=3RW4026-2TB04"},"ai":{"faq":[{"question":"What is the 3RW4026-2TB04's current rating at different temperatures?","answer":"The integrated bypass contact system shunts the thyristors during run, reducing heat load in the cabinet."},{"question":"Does the 3RW4026-2TB04 have an integrated bypass?","answer":"Yes — an integrated bypass contact system closes after the motor reaches speed, taking the thyristors out of circuit and eliminating their continuous power dissipation."},{"question":"What termination type does the 3RW4026-2TB04 use?","answer":"Spring-loaded terminals on both the main current circuit and the auxiliary/control circuit."},{"question":"What is the 3RW4026-2TB04's mounting position flexibility?","answer":"With the optional fan, mount on a vertical surface with ±90° rotation or ±22.5° tilt front-to-back. Without the fan, rotation is limited to ±10°."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4026-2TB04","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/3RW4026-2TB04 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}}