{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL3040-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL3040-7","canonicalUrl":"https://aoctrl.com/siemens/5SL3040-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SL3040-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, miniature circuit breaker (MCB), 1P+N, 40 A, C-curve, 4.5 kA breaking capacity at 230 V AC, 18 mm width, standard rail mount.","salesMarkdown":"The Siemens SENTRON 5SL3040-7 is a 1P+N miniature circuit breaker (MCB) rated at 40 A with a C tripping characteristic and a 4.5 kA breaking capacity at 230 V AC. The 1P+N configuration switches both the line and neutral conductors, with the neutral pole switching but not protected against overcurrent. That matters in single-phase residential or light commercial panels where you want a single-width unit that isolates both poles on fault. Rated 40 A continuous, this breaker handles the full load of a 9.2 kW resistive circuit at 230 V. If your fault current runs higher, you'll need a higher-rated device upstream for selectivity. Snaps onto standard DIN rail, 18 mm wide (one width unit), 90 mm tall, and 76 mm deep. Installation depth is 70 mm. Tightening torque is 2 to 2.5 N·m (17.7 to 22.1 lbf·in) — standard for a screw terminal of this class. The unit is sealable (tamper-evident seal cap available), halogen-free and silicon-free construction, IP20 with conductors connected. That covers most indoor panel environments; derating applies above 45 °C per the thermal curve. The neutral conductor is switched — when the breaker trips or is manually switched off, the neutral pole opens too. This is a safety feature for single-phase circuits where you want full isolation. The unit also carries touch protection per the terminal design, and it's vibration-resistant per IEC 60068-2-6. Overvoltage category III, energy limiting class 3 — standard for distribution board duty.","metaTitle":"Siemens SENTRON 5SL3040-7 MCB, 1P+N, 40 A, C-Curve, 4.5 kA","metaDescription":"Siemens SENTRON 5SL3040-7 miniature circuit breaker, 1P+N, 40 A rated, C tripping characteristic, 4.5 kA breaking capacity at 230 V AC. Current lifecycle stage, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 16 mm²","Width":"18 mm","title":"5SL3040-7","Height":"90 mm","Minimum":"24 V","Sealable":"Yes","Stranded":"0.75 ... 16 mm²","description":"CIRCUIT BREAKER 230V 4.5KA, 1+N-POLE/1MW C40","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"standard rail","During Storage":"-40 ... +75 °C","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"230 V","Overvoltage category":"III","Combined Terminal Top":"No","Energy limiting class":"3","Number of width units":"1","Number of poles / Note":"1P+N","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"No","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"4.5 kA","Position / of power supply cord":"Any","Product feature / Touch protection":"Yes","Vibration resistance / acc. to IEC 60068-2-6":"Yes","Tightening torque / with screw-type terminals":"2 ... 2.5 N·m","with single-phase operation / at AC / maximum":"250 V","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"4 000","Tightening torque [lbf·in] / with screw-type terminals":"17.7 ... 22.1 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b4e30998af6d80acdd96a74a6890714b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1354176&mlfb=5SL3040-7"},"ai":{"faq":[{"question":"What conductor sizes does the 5SL3040-7 accept?","answer":"Solid or stranded copper from 0.75 mm² up to 16 mm². Tightening torque is 2 to 2.5 N·m (17.7 to 22.1 lbf·in)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL3040-7","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/5SL3040-7 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}}