{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP4491-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP4491-6","canonicalUrl":"https://aoctrl.com/siemens/5SP4491-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SP4491-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP4491-6, 4-pole B-curve miniature circuit breaker, 100 A rated, 10 kA breaking capacity at 400 V AC, 6 MW wide, DIN rail mount.","salesMarkdown":"## What this 100 A 4P B-curve MCB does in a panel The Siemens SENTRON 5SP4491-6 is a 4-pole miniature circuit breaker with B tripping characteristic, rated 100 A at 400 V AC and a breaking capacity of 10 kA per EN 60898. At 100 A per pole and 4 poles ganged, this covers a 400 V three-phase feeder or a large single-phase subfeed where you need coordinated overcurrent protection on all conductors. Fastens by DIN rail (standard top-hat rail per EN 60715) or screw fixing. Terminal tunnels at top and bottom accept copper conductors — strip length and torque per the manufacturer's installation instructions. The 6 MW width (108 mm,) occupies six 18 mm module spaces on the DIN rail. Rated IP20 with connected conductors, IP40 in the handle area with the distribution cover fitted. ## Environmental and material compliance Degree of pollution 3 and overvoltage category 3 per IEC 60947-1, meaning it's suitable for fixed industrial installations where transient overvoltages are controlled by upstream SPDs. Shock resistance 150 m/s² at 11 ms half-sine and vibration resistance 50 m/s² at 25–150 Hz, 60 m/s² at 35 Hz for 4 s per IEC 60068-2-27 and IEC 60068-2-6 — suitable for installation on machinery or in transport-adjacent panels.","metaTitle":"Siemens 5SP4491-6 SENTRON MCB, 4P B 100A 10kA","metaDescription":"Siemens SENTRON 5SP4491-6 miniature circuit breaker, 4-pole, B-curve, 100 A, 10 kA per EN 60898, 400 V AC. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"108 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","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":"6","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=65457&mlfb=5SP4491-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP4491-6/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP4491-6","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/5SP4491-6 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}}