{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4026-1TB04","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4026-1TB04","canonicalUrl":"https://aoctrl.com/siemens/3RW4026-1TB04","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4026-1TB04","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4026-1TB04 soft starter, Size S0, 25 A at 40 °C, 50/60 Hz, screw terminals, integrated bypass, snap-on mounting.","salesMarkdown":"The Siemens 3RW4026-1TB04 is a SIRIUS soft starter in the compact Size S0 frame, rated 25 A at 40 °C for standard motor starting on 50/60 Hz lines. The integrated bypass contact system means you don't need a separate bypass contactor — the soft starter handles both ramp-up and running, saving panel space and wiring. Derate to 23 A at 50 °C and 21 A at 60 °C, so a warm cabinet eats into headroom. The 600 V insulation voltage covers 480 V systems with margin, and the 50/60 Hz operating frequency means one part works globally. Minimum load is 20 % of the rated current, so it won't start a motor that's too small for the unit — keep that in mind if you're paralleling small motors. ## Where it lives in the panel Size S0 means a 45 mm wide footprint on the DIN rail, 125 mm tall, 155 mm deep. Clearance: 60 mm above, 40 mm below, 15 mm at the sides. The screw-type terminals on the main circuit accept 2x (0.5... 2.5 mm²) solid or stranded, and the auxiliary/control circuit uses the same screw terminals. Wire length to the motor can run up to 300 m, which covers most plant floor runs. Mounting position is flexible: with the optional fan you can rotate the unit ±90° and tilt ±22.5° front-to-back; without the fan, rotation is limited to ±10°. That matters when you're squeezing it into a tight corner of a panel.","metaTitle":"Siemens 3RW4026-1TB04 Soft Starter, 25 A, S0, SIRIUS","metaDescription":"Siemens 3RW4026-1TB04 SIRIUS soft starter, 25 A at 40 °C, Size S0, integrated bypass. Active production. Sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Soft Starters"],"specifications":{"Depth":"155mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"45mm","Height":"125mm","Upwards":"60mm","Downwards":"40mm","Thyristors":"Yes","At The Side":"15mm","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%","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 (20 ... 14)","For Main Current Circuit":"screw-type 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":"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":"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%","For Auxiliary Contacts Finely Stranded With Core End Processing":"2x (20 ... 16)","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":"$465.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=108756&mlfb=3RW4026-1TB04","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4026-1TB04/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RW4026-1TB04 and get a price?","answer":"We source this part to order against an RFQ. Submit a request and we'll confirm availability and current pricing at quote time."},{"question":"What is the depth of 3RW4026-1TB04?","answer":"The depth is 155 mm, with a width of 45 mm and height of 125 mm for the Size S0 frame."},{"question":"What wire sizes does the 3RW4026-1TB04 accept?","answer":"The main circuit screw terminals accept 2x (0.5 to 2.5 mm²) solid or stranded conductors."},{"question":"Does 3RW4026-1TB04 need a separate bypass contactor?","answer":"No, the integrated bypass contact system handles running current after the start ramp, so you don't need an external bypass contactor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4026-1TB04","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/3RW4026-1TB04 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}