{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW3455-0DC35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW3455-0DC35","canonicalUrl":"https://aoctrl.com/siemens/3RW3455-0DC35","factsUrl":"https://aoctrl.com/api/mcp/products/3RW3455-0DC35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW3455-0DC35 soft starter for standard applications, 121 A at 40 °C, 400... 600 V operating voltage, screw fixing, IP20.","salesMarkdown":"## Current ratings and thermal derating The Siemens SIRIUS 3RW3455-0DC35 is a soft starter for standard applications, rated 121 A at 40 °C in a standard circuit configuration. That current rating drops to 99 A at 50 °C and 73 A at 60 °C, so the enclosure ventilation and ambient temperature directly govern the motor current this unit can handle continuously. The operating voltage range is 400... 600 V at 50/60 Hz, covering common 400 V and 480 V industrial supplies. ## Inside-delta connection unlocks higher power Wired in an inside-delta configuration, the same unit handles 75 kW at 40 °C versus 45 kW in a standard circuit — a 67 % power gain from the same hardware. At 50 °C the inside-delta rating is 100 hp compared to 50 hp standard. This matters when the motor is physically larger than the soft starter's standard rating, because the inside-delta connection places the thyristors in the motor windings rather than the supply lines, reducing the current each device sees. The main current circuit connects via busbar connections, while the auxiliary and control circuit uses screw-type terminals. Mounting is screw fixing — no DIN-rail clip — so plan for panel-mounting with the 216 mm width, 356 mm height, and 187 mm depth. The control supply voltage is AC/DC at 115 V, 50/60 Hz. Three NO auxiliary contacts are provided; no NC or CO contacts are fitted.","metaTitle":"Siemens 3RW3455-0DC35 SIRIUS Soft Starter, 121 A, 400-600 V","metaDescription":"Siemens SIRIUS 3RW3455-0DC35 soft starter for standard applications. Rated 121 A at 40°C, 400-600 VAC. Current production. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"187mm","Width":"216mm","Height":"356mm","Mounting type":"screw fixing","lifecycle_stage":"current","During Operation":"60°C","Product brand name":"SIRIUS","Product designation":"soft starters for standard applications","Protection class IP":"IP20","Derating temperature":"40°C","at 50 Hz rated value":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"121A","at 50 °C rated value":"99A","at 60 °C rated value":"73A","For Main Current Circuit":"busbar connection","Motor Overload Protection":"No","Operating frequency rated value":"50 ... 60Hz","Integrated Bypass Contact System":"No","Reference code acc. to DIN EN 61346-2":"Q","Number of poles for main current circuit":"3","Evaluation of thermistor motor protection":"No","For Auxiliary And Control Current Circuit":"screw-type terminals","at standard circuit at 40 °C rated value":"45 000W","at standard circuit at 50 °C rated value":"50hp","Number of CO contacts for auxiliary contacts":"0","Number of NC contacts for auxiliary contacts":"0","Number of NO contacts for auxiliary contacts":"3","Type of voltage of the control supply voltage":"AC/DC","at inside-delta circuit at 40 °C rated value":"75 000W","at inside-delta circuit at 50 °C rated value":"100hp","Control supply voltage frequency 1 rated value":"50Hz","Control supply voltage frequency 2 rated value":"60Hz","Operating voltage at standard circuit rated value":"400 ... 600V","Operating voltage at inside-delta circuit rated value":"400 ... 600V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8,155.50","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=284910&mlfb=3RW3455-0DC35","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW3455-0DC35/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW3455-0DC35","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/3RW3455-0DC35 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}}