{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4436-6BC44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4436-6BC44","canonicalUrl":"https://aoctrl.com/siemens/3RW4436-6BC44","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4436-6BC44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW44 series soft starter, 3RW4436-6BC44, 281 A rated at 40 °C, 230 V, 50/60 Hz, with adjustable current limitation and inside-delta wiring.","salesMarkdown":"The Siemens SIRIUS 3RW4436-6BC44 is a soft starter rated 281 A at 40 °C, 230 V, 50/60 Hz, with adjustable current limitation and integrated motor overload protection. It supports inside-delta circuit wiring, which reduces the current through the thyristors and allows a smaller unit for the same motor current — a common choice for larger motor starts where panel space is tight. The insulation voltage is rated 690 V. The operating frequency covers 50 to 60 Hz, making it suitable for both IEC and NEMA line frequencies. The adjustable current limitation lets you set the starting current between the minimum load of 8 % and the full rated current — useful for limiting inrush on weak supplies or protecting driven equipment. The inside-delta circuit means the thyristors sit in the delta legs of a six-wire motor, so the unit can be smaller for a given motor rating; confirm the motor has six accessible leads before specifying this wiring. Dimensions: 170 mm wide, 200 mm high, 270 mm deep. The 270 mm depth is notable: it needs a deep enclosure or a back-to-back gland plate clearance. Clearances: 100 mm upwards, 75 mm downwards, 5 mm at the side for airflow and wiring. The main current circuit uses busbar connection; stranded cable from 25 to 120 mm² or fine-stranded 16 to 95 mm² for the power terminals. Auxiliary contacts accept solid 2x (0.5 to 2.5 mm²) or stranded 2x (20 to 14 AWG). The maximum wire length to the motor is 500 m — watch for voltage drop and reflected-wave effects on long cable runs, especially with the thyristor switching. ## Fault signaling and protection The unit has a display for fault signals and supports an external reset — useful for remote reset in unattended installations. Intrinsic device protection covers the soft starter itself against overtemperature and overcurrent, separate from the motor overload protection.","metaTitle":"Siemens SIRIUS 3RW4436-6BC44 Soft Starter, 281 A, 230 V, 50/","metaDescription":"Siemens SIRIUS 3RW4436-6BC44 soft starter, 281 A at 40 °C, 230 V, 50/60 Hz. Adjustable current limitation, inside-delta circuit, motor overload protection. Current production. Avai","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.5 ... 2.5 mm²)","Width":"170mm","title":"3RW4436-6BC44","Height":"200mm","Upwards":"100mm","Stranded":"25 ... 120 mm²","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 400 V, 40 °C standard: 162 A, 90 kW Inside-delta: 281 A, 160 kW 200-460 V AC, 230 V AC Screw terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5536-6HA14<<","During Storage":"-25 ... +80°C","External Reset":"Yes","Finely Stranded":"16 ... 95 mm²","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","For Main Contacts":"4 ... 250 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":"230V","at 60 Hz rated value":"230V","at 40 °C rated value":"281A","at 50 °C rated value":"251A","at 60 °C rated value":"217A","For Auxiliary Contacts":"2x (20 ... 14)","For Main Current Circuit":"busbar connection","Motor Overload Protection":"Yes","Using Both Clamping Points":"max. 2x 1/0","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"6 ... 2/0","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"6 ... 2/0","Operating Frequency Rated Value":"50 ... 60Hz","Display Version For Fault Signal":"Display","Integrated Bypass Contact System":"Yes","For Auxiliary And Control Circuit":"screw-type 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 (0.5 ... 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":"90kW","at standard circuit at 50 °C rated value":"100hp","Finely Stranded Without Core End Processing":"max. 1x 50 mm², 1x 70 mm²","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":"160kW","at inside-delta circuit at 50 °C rated value":"200hp","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 ... 460V","contact rating of auxiliary contacts according to UL":"B300 / R300","Operating Voltage At Inside-Delta Circuit Rated Value":"200 ... 460V","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 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":"95W","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":"32A","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":"$3,807.00 – $5,505.83","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/023f19646aaf7e83e6a54ee06e558c8e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=56585&mlfb=3RW4436-6BC44"},"ai":{"faq":[{"question":"What is 3RW4436-6BC44's listed depth?","answer":"The depth is 270 mm. This is the dimension from the mounting surface to the front of the unit."},{"question":"What compliance documentation does this brand provide for 3RW4436-6BC44?","answer":"The evidence does not list specific compliance documents (RoHS, REACH, UL, IEC) for this order code. The unit is rated per IEC 60947-4-2 for pollution degree 3, and the insulation voltage is 690 V. For full declarations, request the manufacturer's documentation at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4436-6BC44","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/3RW4436-6BC44 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}}