{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP4391-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP4391-6","canonicalUrl":"https://aoctrl.com/siemens/5SP4391-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SP4391-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP series, 5SP4391-6, 3-pole B-curve miniature circuit breaker, 100 A, 10 kA breaking capacity per EN 60898, 400 V AC, DIN-rail mount.","salesMarkdown":"The B-curve means it trips magnetically between 3 and 5 times rated current — so at 300 A to 500 A fault current it opens in under 100 ms. That's the curve you spec for resistive loads, general-purpose lighting circuits, or any branch where you don't want nuisance tripping from mild motor inrush. For motor circuits you'd want a C-curve (5-10x In); for transformer or drive input, a D-curve (10-20x In). This one is B, so keep that in mind if you're swapping it into a panel that feeds a pump. In a commercial or light industrial panel with a transformer feeding 400 V, that 10 kA SCCR covers most branch circuits unless you're right at the main switchboard where fault current can hit 25 kA or more. For those positions, step up to an SENTRON 5SY series with 25 kA or 50 kA rating. ## Panel fit and mounting — DIN rail, screw fixing, and that 76 mm depth The 81 mm width times three poles means it occupies 4.5 modular width units (a 9 mm module is standard for Siemens MCBs). So in a 12-module row you fit two of these with three modules left over for a smaller single-pole breaker or a shunt trip. Tunnel terminals top and bottom accept copper conductors up to 35 mm² typically (check your local code). The terminals are sealable — there's a provision for a lead seal or a tamper-evident sticker, which matters for utility metering or any circuit that needs to stay locked after commissioning. IP20 with connected conductors, IP40 at the handle area with the distribution cover fitted — that's standard for panelboard use, not outdoor or washdown. ## Lifecycle and sourcing — still active, no LTB worry For compliance documentation: the 5SP series carries CE marking per the Low Voltage Directive, and Siemens provides a Declaration of Conformity on request. The part is halogen-free and silicon-free — that matters for high-reliability environments like data centers or medical facilities where outgassing from a fault can damage sensitive equipment.","metaTitle":"Siemens 5SP4391-6 SENTRON MCB, 3P B-curve 100A 10kA","metaDescription":"Siemens SENTRON 5SP4391-6 miniature circuit breaker, 3-pole, B-curve, 100 A, 10 kA per EN 60898. Active production. DIN-rail mount. Quoted to order.","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":"5SP4391-6","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 3-pole, B, 100 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":"8 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/54d09ab78f2cd9a3a112af20d4b3e465.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=337312&mlfb=5SP4391-6"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP4391-6","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/5SP4391-6 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}}