{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL1302-7MB","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL1302-7MB","canonicalUrl":"https://aoctrl.com/siemens/5SL1302-7MB","factsUrl":"https://aoctrl.com/api/mcp/products/5SL1302-7MB","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SL1302-7MB miniature circuit breaker, 3-pole, C-curve, 2 A, 3 kA per IEC 60947-2, 230/400 V AC, 50/60 Hz.","salesMarkdown":"It breaks faults at 3 kA per IEC 60947-2 on a 230/400 V AC system, 50/60 Hz. The C-curve (tripping characteristic class C) means the magnetic trip fires at 5 to 10 times rated current — so 10 A to 20 A for this 2 A breaker. That suits mixed loads with moderate inrush: lighting banks, small transformers, control circuits. If your distribution panel's available fault current exceeds 3 kA, step up to the 10 kA variant (5SL4363-7). Power loss runs 1.25 W per pole in hot operating state — four poles (three active plus one if used as switched neutral) dissipate about 5 W total. That's low enough to ignore derating in a standard 3-module-width (54 mm) enclosure, but if you pack adjacent breakers in a sealed box, sum the losses. IP20 with connected conductors means finger-safe terminals when wired — no protection against dripping water. This breaker lives inside a distribution board or enclosure, not exposed on the line. ## Panel integration Three modular width units at 18 mm each — total 54 mm wide. Snaps onto standard DIN rail; the sealable option lets you lock the toggle position with a lead seal or padlock hasp for LOTO compliance. Halogen-free and silicon-free — no corrosive off-gassing if the breaker arcs internally in a confined panel.","metaTitle":"Siemens 5SL1302-7MB SENTRON MCB, 3P C-Curve 2A, 3kA","metaDescription":"Siemens 5SL1302-7MB SENTRON miniature circuit breaker, 3-pole, C-curve, 2A rated, 3kA breaking capacity per IEC 60947-2. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["3-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"54 mm","title":"5SL1302-7MB","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 230/400V 3kA, 3pole, C, 2A","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"3P","Number Of Poles":"3","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Suitability For Operation":"Residential buildings/infrastructure","at DC rated value maximum":"72 V","Number Of Modular Width Units":"3","Tripping Characteristic Class":"C","supply voltage at AC rated value":"230 V","according to IEC 60947-2 rated value":"3 kA","Type Of Voltage Of The Operating Voltage":"AC","with multi-phase operation at AC maximum":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"253 V","Mechanical Service Life (Operating Cycles) Typical":"4 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.25 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d368134d3bb6db809930aa899cb5cde2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1046740&mlfb=5SL1302-7MB"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SL1302-7MB?","answer":"3 kA at 400 V AC per IEC 60947-2. That is the industrial standard rating; for residential applications it also meets EN 60898 requirements at the same 3 kA level."},{"question":"Will the 5SL1302-7MB fit in a panel designed for the 5SL4363-7?","answer":"Yes — same 54 mm width (3 modules), same 76 mm depth, same 70 mm installation depth, same DIN-rail mounting. The 5SL4363-7 is a 10 kA variant with a higher interrupting rating; the 5SL1302-7MB drops into the same physical footprint without rewiring."},{"question":"Where can I buy the 5SL1302-7MB?","answer":"Sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL1302-7MB","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/5SL1302-7MB 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}}