{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP4392-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP4392-6","canonicalUrl":"https://aoctrl.com/siemens/5SP4392-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SP4392-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP Series, 5SP4392-6, miniature circuit breaker, 3-pole, B-curve, 125 A, 10 kA per EN 60898, 400 V AC.","salesMarkdown":"The Siemens SENTRON 5SP4392-6 is a 3-pole miniature circuit breaker rated 125 A with B-curve tripping characteristic, breaking 10 kA per EN 60898 at 400 V AC. This is the part for a 3-phase 125 A feeder where the upstream fault level stays under 10 kA — the B curve means it trips at 3 to 5 times rated current, so it suits resistive or general-purpose loads where inrush is moderate. Installation depth is 70 mm; overall depth 76 mm, width 81 mm (4.5 modular width units). The B-curve (3-5× In) provides fast response to short circuits while tolerating the modest inrush of resistive loads, lighting, or small transformers. Rated 400 V AC at 50/60 Hz, 3-pole configuration, so it switches all three phases simultaneously — critical for a 3-phase panel where single-pole interruption could cause single-phasing on a motor load. Fastens via DIN rail or screw fixing — the DIN rail is the standard for panel builders; the screw option helps in retrofit enclosures without a DIN rail. Mounting position any, so vertical or horizontal orientation in the panel is acceptable. The 4.5 modular width units (81 mm) occupy the space of 4.5 standard 18 mm-wide module positions on the rail. Sealable — a lead seal can be fitted to the toggle to lock the breaker in the ON or OFF position for lockout/tagout compliance. IP20 with connected conductors, IP40 in the handle area with a distribution cover — not a washdown rating, but suitable for dry indoor panels. Shock resistance 150 m/s² at 11 ms half-sine per IEC 60068-2-27; vibration resistance 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz per IEC 60068-2-6 — the breaker holds its calibration under typical industrial vibration.","metaTitle":"Siemens SENTRON 5SP4392-6 MCB, 3P B 125A 10kA","metaDescription":"Siemens SENTRON 5SP4392-6 miniature circuit breaker, 3-pole, B-curve, 125 A, 10 kA per EN 60898, 400 V AC. Active production, sourced to order. Depth 76 mm, DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"81 mm","title":"5SP4392-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, B, 125 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Fastening Method":"DIN rail and screw fixing","Mounting Position":"any","at AC rated value":"440 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20 with connected conductors, IP40 in the area of the handle with distribution cover","Overvoltage Category":"3","Tunnel Terminals Top":"Yes","Design Of The Product":"5SP Miniature circuit breakers","Tunnel Terminals Bottom":"Yes","Number Of Modular Width Units":"4.5","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"B","supply voltage at AC rated value":"400 V","according to EN 60898 rated value":"10 kA","Influence Of The Surrounding Temperature":"Max. 95% rel. humidity","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50/60 Hz","shock resistance according to IEC 60068-2-27":"150m/s² at 11ms half-sine","with multi-phase operation at AC rated value":"440 V","vibration resistance according to IEC 60068-2-6":"50m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","power loss [W] for rated value of the current at AC in hot operating state per pole":"10.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2d4d7b99825f5fa2a9883ff65d1c17ef.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=392845&mlfb=5SP4392-6"},"ai":{"faq":[{"question":"Where can I buy 5SP4392-6 and what is the price?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What is 5SP4392-6's depth and width?","answer":"Overall depth 76 mm, installation depth 70 mm; width 81 mm (4.5 modular width units)."},{"question":"Will 5SP4392-6 drop into a panel specified around 5SL4363-7 without rewiring?","answer":"The 5SL4363-7 is a 3-pole 63 A C-curve MCB; the 5SP4392-6 is 125 A B-curve. Both mount on DIN rail with tunnel terminals, but the 125 A rating requires larger conductor cross-section — the existing wiring from a 63 A circuit is undersized. Panel space: the 5SP4392-6 occupies 4.5 MWU (81 mm) versus the 5SL4363-7's 3 MWU (54 mm) — verify rail space before swap."},{"question":"What compliance documentation does Siemens provide for 5SP4392-6?","answer":"The part is halogen-free and silicon-free; the standard Siemens SENTRON documentation package includes RoHS and REACH declarations, CE marking, and the IEC 60898 test certificate. For specific UL or other jurisdiction certs, confirm at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP4392-6","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/5SP4392-6 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}}