{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4453-2BC36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4453-2BC36","canonicalUrl":"https://aoctrl.com/siemens/3RW4453-2BC36","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4453-2BC36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS soft starter 3RW4453-2BC36, 954 A at 40 °C, 690 V insulation voltage, inside-delta circuit, integrated bypass contact system, screw fixing.","salesMarkdown":"## What this SIRIUS soft starter delivers The unit works on 50 or 60 Hz supplies at 115 V control voltage. An integrated bypass contact system means the thyristors are shorted out once the motor is at speed, dropping heat dissipation in the enclosure and improving overall efficiency. For applications needing a tighter footprint, the 3RW4453-2BC36 supports inside-delta wiring, which lets the starter handle a given motor current with lower-rated thyristors — a common trick on larger frames. Mounting is screw-fixed with a vertical surface orientation, rotatable ±90° or tiltable ±22.5° front/back. Clearance requirements are 100 mm upward, 75 mm downward, and 5 mm at the sides — tight enough for most MCC buckets. ## Current derating and real-world fit The 954 A rating at 40 °C drops to 856 A at 50 °C and 759 A at 60 °C. Minimum load is 8 % of rated current, so it handles lightly loaded motors or soft-start-only applications without nuisance tripping. Adjustable current limitation is built in, along with motor overload protection and intrinsic device protection (thyristor overtemperature, phase loss). ## Wiring and connection details Main current circuit connections use busbar connection. Stranded cable range is 70 to 240 mm²; finely stranded accepts 50 to 240 mm². For North American builds, the main contacts accept 2/0 to 500 kcmil. Auxiliary and control circuits terminate on spring-loaded terminals accepting 2x (0.25 to 1.5 mm²) solid or 2x (24 to 16 AWG). Maximum wire length from starter to motor is 500 m.","metaTitle":"Siemens 3RW4453-2BC36 SIRIUS Soft Starter, 954A at 40°C","metaDescription":"Siemens SIRIUS 3RW4453-2BC36 soft starter, 954A rated at 40°C, 690V insulation voltage, inside-delta capable with integrated bypass.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"290mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"510mm","Height":"640mm","Upwards":"100mm","Stranded":"70 ... 240 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","During Storage":"-25 ... +80°C","External Reset":"Yes","Finely Stranded":"50 ... 240 mm²","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","For Main Contacts":"2/0 ... 500 kcmil","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° 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":"500m","Derating Temperature":"40°C","Inside-Delta Circuit":"Yes","at 50 Hz rated value":"115V","at 60 Hz rated value":"115V","at 40 °C rated value":"954A","at 50 °C rated value":"856A","at 60 °C rated value":"759A","For Auxiliary Contacts":"2x (24 ... 16)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Insulation Voltage Rated Value":"690V","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"Display","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Component Motor Brake Output":"Yes","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":"355kW","at standard circuit at 50 °C rated value":"500hp","number of CO contacts for auxiliary contacts":"1","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","at inside-delta circuit at 40 °C rated value":"630kW","at inside-delta circuit at 50 °C rated value":"950hp","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":"400 ... 690V","at 690 V at standard circuit at 40 °C rated value":"560kW","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"400 ... 600V","Relative Negative Tolerance Of The Operating Frequency":"-10%","Relative Positive Tolerance Of The Operating Frequency":"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":"159W","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":"110A","Relative Negative Tolerance Of The Operating Voltage At Inside-Delta Circuit":"-15%","Relative Positive Tolerance Of The Operating Voltage At Inside-Delta Circuit":"10%"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=164601&mlfb=3RW4453-2BC36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RW4453-2BC36/alternatives.json"},"ai":{"faq":[{"question":"Can 3RW4453-2BC36 be used in an inside-delta configuration?","answer":"Yes, the starter supports inside-delta circuit wiring, which reduces the current seen by the thyristors relative to the motor line current. This is a standard option on larger SIRIUS soft starters."},{"question":"Where can I buy 3RW4453-2BC36?","answer":"This part is sourced to order against an RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4453-2BC36","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/3RW4453-2BC36 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}}