{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7240-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7240-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY7240-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7240-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7240-7CC, 2-pole miniature circuit breaker, 40 A rated current, C tripping characteristic, 400 V AC, 25 kA breaking capacity per IEC 60947-2, 36 mm wide (2 MW).","salesMarkdown":"## Siemens SENTRON 5SY7240-7CC — 40 A C-Curve 2-Pole MCB Two poles, 36 mm wide (2 MW), it snaps onto DIN rail and suits panel builds where 40 A branch protection is needed on lighting, motor, or distribution subfeeds. Breaking capacity is 25 kA per IEC 60947-2 and 5 kA per UL 1077 / CSA C22.2 No.235 — enough for most industrial distribution boards with high fault current. The C-curve trips on short-circuit between 5× and 10× In (200–400 A) — right for motor or capacitive loads that draw a brief inrush but not for highly inductive switching where a D-curve might be preferred. At 400 V AC the breaker clears faults up to 25 kA. Under UL 1077 the rating drops to 5 kA — if your panel requires a UL 489 listed breaker, this is a supplementary protector per UL 1077, not a branch-circuit rated device. Verify the listing class your local code demands. Wire range accepts 0.75–35 mm² solid or stranded. Torque terminals to 2.5–3.5 N·m. Combined terminals top and bottom allow through-wiring or daisy-chaining busbars without extra lugs. Snap-on DIN rail mount, any position. The 36 mm width matches two standard modular units. Installation depth is 70 mm; total depth 76 mm includes the handle. Sealable for lockout/tagout — padlock through the toggle hole. Ambient range -25 to +55 °C, storage -40 to +75 °C. Halogen-free and silicon-free construction for sensitive environments like clean rooms or semiconductor fabs.","metaTitle":"Siemens 5SY7240-7CC SENTRON MCB, 2P 40A C-Curve, 25kA IEC","metaDescription":"Siemens SENTRON 5SY7240-7CC miniature circuit breaker, 2-pole 40A C-trip, 25kA IEC 60947-2, 5kA UL 1077. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"36 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"2","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP20, with connected conductors","at AC / rated value":"400 V","Overvoltage category":"III","Combined Terminal Top":"Yes","Number of width units":"2","Number of poles / Note":"2P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"40 A","Tripping characteristic class":"C","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"25 kA","Product feature / Touch protection":"Yes","Influence of the surrounding temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","Tightening torque / with screw-type terminals":"2.5 ... 3.5 N·m","Product function / neutral conductor switching":"No","with multi-phase operation / at AC / rated value":"440 V","with single-phase operation / at AC / rated value":"440 V","Mechanical service life (switching cycles) / typical":"10 000","Tightening torque [lbf·in] / with screw-type terminals":"22 ... 31 lbf·in"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/51e11ba457460a2ef624d5b602f8753b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=358153&mlfb=5SY7240-7CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7240-7CC/alternatives.json"},"ai":{"faq":[{"question":"What is 5SY7240-7CC's listed depth (76 mm) on this component line?","answer":"The total depth is 76 mm, which includes the handle projection. Installation depth behind the panel is 70 mm."},{"question":"What is 5SY7240-7CC's listed solid (0.75... 35 mm²) on this component line?","answer":"The terminal accepts solid conductors from 0.75 mm² up to 35 mm². Stranded conductors also range 0.75–35 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7240-7CC","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/5SY7240-7CC 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}}