{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP4291-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP4291-8","canonicalUrl":"https://aoctrl.com/siemens/5SP4291-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SP4291-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP series miniature circuit breaker, 2-pole, D characteristic, 100 A rated at 400 V AC, 10 kA breaking capacity per EN 60898, 3 modular width units, DIN rail and screw fixing.","salesMarkdown":"The Siemens SENTRON 5SP4291-8 is a 2-pole miniature circuit breaker with a D tripping characteristic, rated 100 A at 400 V AC and 10 kA breaking capacity per EN 60898. ## Ratings that matter for fit The 100 A rating holds at 30 °C ambient; derate to 95 A at 40 °C, 89.5 A at 50 °C, and 84 A at 60 °C — important when the breaker shares a crowded enclosure with other heat sources. Multi-phase operation is rated at 440 V AC, giving headroom for 400 V line-to-line systems. Fastens via DIN rail or screw fixing — both options on the same housing. Mounting position any, so vertical or horizontal busbar runs both work. Tunnel terminals top and bottom accept conductors without ferrules. Touch protection is built in. Sealable cover available for tamper-proofing.","metaTitle":"Siemens 5SP4291-8 SENTRON MCB, D Curve, 100 A, 2-Pole, 400 V","metaDescription":"Siemens 5SP4291-8 SENTRON miniature circuit breaker, D tripping characteristic, 100 A rated at 400 V AC, 10 kA breaking capacity per EN 60898. DIN rail mount, 3 MW. Current lifecyc","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SP4291-8","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit breaker 400 V 10kA, 2-pole, D, 100 A, D=70 mm","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"DIN rail and screw fixing","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"100 A","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","according to EN 61346-2":"F","at 30 °C / rated value":"100 A","at 40 °C / rated value":"95 A","at 45 °C / rated value":"92 A","at 50 °C / rated value":"89.5 A","at 55 °C / rated value":"87 A","at 60 °C / rated value":"84 A","according to IEC 81346-2":"FC","Number Of Modular Width Units":"3","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"10 kA","supply voltage / at AC / rated value":"400 V","Influence Of The Surrounding Temperature":"Max. 95% rel. humidity","Type Of Voltage / Of The Operating Voltage":"AC","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 (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$114.30","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c5782e385430cec302f64ec8cb022161.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=202516&mlfb=5SP4291-8"},"ai":{"faq":[{"question":"Where can I buy 5SP4291-8?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What is the closest functional second-source to 5SP4291-8?","answer":"The 5SP4292-7 is a peer in the same SENTRON 5SP family — same D curve, same pole count, same form factor — but check its rated current and breaking capacity against your load. The 5SP4291-8 carries 100 A at 400 V AC with 10 kA per EN 60898."},{"question":"Will 5SP4291-8 drop into a panel specified around 5SP4292-7 without rewiring?","answer":"Yes — both are 2-pole, 3-modular-width (54 mm) DIN-rail breakers from the same SENTRON 5SP series, so the footprint and busbar pitch are identical. No rewiring needed if the current and breaking capacity match your circuit."},{"question":"What compliance documentation does Siemens provide for 5SP4291-8?","answer":"The breaker is designed to EN 60898 and IEC 81346-2 (designation FC). It is halogen-free and silicon-free. Specific RoHS, REACH, UL, or IEC certificates should be requested with the RFQ — the evidence does not list them directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP4291-8","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/5SP4291-8 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}}