{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RW4425-3BC46","brand":"Siemens","brandSlug":"siemens","productSlug":"3RW4425-3BC46","canonicalUrl":"https://aoctrl.com/siemens/3RW4425-3BC46","factsUrl":"https://aoctrl.com/api/mcp/products/3RW4425-3BC46","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RW4425-3BC46 soft starter, 99 A at 40 °C, 230 V 50/60 Hz, integrated bypass contact system, adjustable current limitation, box terminal main circuit, spring-loaded auxiliary/control terminals, screw fixing, 270 mm depth.","salesMarkdown":"## 99 A at 40 °C — the rating that governs the motor start The 3RW4425-3BC46: The integrated bypass contact system means the thyristors are shorted out once the motor reaches full speed, eliminating SCR heat dissipation during continuous run — a key differentiator from open-loop soft starters that stay in conduction. ## Mounting and clearance — panel fit constraints Dimensions are 192 mm high by 170 mm wide by 270 mm deep, fastened via screw fixing. The mounting position allows vertical surface mounting with ±90° rotation and ±22.5° tilt front-to-back — useful when the panel layout forces an off-axis orientation. Clearance requirements: 100 mm above, 75 mm below, and only 5 mm at the sides — the tight side gap means you can nest units close together horizontally, but the vertical airflow path needs the full 100/75 mm for natural convection cooling. ## Wiring and terminal details — main vs control circuit Main current circuit uses box terminals accepting stranded 2x (4... 50 mm²) or using both clamping points 2x (10... 1/0 AWG). The back and front clamping points each accept 10... 2/0 AWG — this gives flexibility for paralleling conductors on larger feeds. Auxiliary contacts are rated 2x (24... 16 AWG). Maximum wire length from the starter to the motor is 500 m — beyond that, voltage drop and cable capacitance can cause nuisance tripping or reduced starting torque. ## Protection and control features — what the settings mean Motor overload protection is built in, along with intrinsic device protection — the starter monitors its own thyristor temperature and will trip before the SCRs exceed their junction rating. Adjustable current limitation lets you set the starting current between 8% and 100% of the rated motor current. The minimum load is 8% of the rated current — below that, the starter may not detect the motor load correctly. External reset allows remote fault clearing without opening the panel door. Fault signals are shown on an integrated display — no need to carry a laptop for basic diagnostics. The inside-delta circuit configuration is supported, which reduces the current rating requirement for the starter when the motor windings are connected in delta.","metaTitle":"Siemens 3RW4425-3BC46 SIRIUS Soft Starter, 99A at 40°C","metaDescription":"Siemens 3RW4425-3BC46 SIRIUS soft starter, 99A at 40°C, 230V 50/60Hz, integrated bypass, adjustable current limit. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Soft Starters"],"specifications":{"Depth":"270mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"170mm","title":"3RW4425-3BC46","Height":"192mm","Upwards":"100mm","Stranded":"2x (4 ... 50 mm²)","Downwards":"75mm","Thyristors":"Yes","At The Side":"5mm","description":"SIRIUS soft starter Values at 690 V, 40 °C standard: 57 A, 55 kW Inside-delta: only up to 600 V 400-690 V AC, 230 V AC spring-type terminals!!! Phased-out product!!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5525-3HA16<<","During Storage":"-25 ... +80°C","External Reset":"Yes","lifecycle_stage":"current","During Operation":"60°C","Fastening Method":"screw fixing","Minimum Load [%]":"8%","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":"99A","at 50 °C rated value":"88A","at 60 °C rated value":"78A","For Auxiliary Contacts":"2x (24 ... 16)","For Main Current Circuit":"box terminal","Motor Overload Protection":"Yes","Using Both Clamping Points":"2x (10 ... 1/0)","Intrinsic Device Protection":"Yes","Adjustable Current Limitation":"Yes","Using The Back Clamping Point":"10 ... 2/0","Insulation Voltage Rated Value":"690V","Using The Front Clamping Point":"10 ... 2/0","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":"37kW","at standard circuit at 50 °C rated value":"40hp","Finely Stranded Without Core End Processing":"2x (4 ... 35 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":"55kW","at inside-delta circuit at 50 °C rated value":"75hp","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":"55kW","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":"36W","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":"11A","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0ab0d56e590292d339ee1209a9d37ebe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=450830&mlfb=3RW4425-3BC46"},"ai":{"faq":[{"question":"What is the 3RW4425-3BC46 rated current at different temperatures?","answer":"It is rated 99 A at 40 °C, derating to 88 A at 50 °C and 78 A at 60 °C ambient. The derating temperature threshold is 40 °C."},{"question":"Does the 3RW4425-3BC46 have an integrated bypass?","answer":"Yes, it includes an integrated bypass contact system that shorts the thyristors once the motor reaches full speed, eliminating SCR heat during continuous operation."},{"question":"What clearance is needed around the 3RW4425-3BC46 in a panel?","answer":"It requires 100 mm clearance above, 75 mm below, and only 5 mm at the sides. The tight side clearance allows close horizontal packing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RW4425-3BC46","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/3RW4425-3BC46 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}}