{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4125-6CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4125-6CC","canonicalUrl":"https://aoctrl.com/siemens/5SY4125-6CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4125-6CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4CC series, miniature circuit breaker, 1-pole, 25 A, B tripping characteristic, 10 kA breaking capacity per EN 60898, 400 V AC, 72 V DC max, IP20.","salesMarkdown":"## What it is and what it does The Siemens 5SY4125-6CC is a SENTRON miniature circuit breaker — one pole, 25 A rated current, B-curve trip, designed to protect branch circuits in industrial control panels and distribution boards. The B characteristic (3–5× In magnetic trip) makes it a fit for resistive and general-purpose loads where inrush is modest; it clears overcurrents before they damage downstream wiring or equipment. Rated 400 V AC with a 10 kA breaking capacity per EN 60898, and 5 kA per UL 1077 / CSA C22.2 No. 235 — so it handles fault currents up to those levels without welding contacts or cascading upstream. The 72 V DC max rating covers control-circuit applications on DC rails. ## Mounting and wiring Snaps onto DIN rail via the quick-assembly system — 18 mm width (1 width unit), any mounting position, any supply-side orientation. Accepts solid or stranded copper from 0.75 mm² up to 35 mm² at the screw terminals; torque to 2.5–3.5 N·m. Combined top and bottom terminals let you loop feed-through without extra busbars. IP20 with conductors connected — fine inside a closed panel, not for wet or dusty environments. Ambient range -25 to +55 °C operating, storage from -40 to +75 °C. Sealable cover option for lockout/tagout compliance.","metaTitle":"Siemens 5SY4125-6CC SENTRON MCB, 1P, 25 A, B Curve, 10 kA","metaDescription":"Siemens 5SY4125-6CC SENTRON miniature circuit breaker, 1-pole, 25 A, B characteristic, 10 kA IEC breaking capacity, 400 V AC. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"18 mm","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Wertebereich":"-25 ... +55 °C","Mounting type":"Quick assembly system","Number of poles":"1","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-40 ... +75 °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","Energy limiting class":"3","Number of width units":"1","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY4CC","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"25 A","Tripping characteristic class":"B","at DC / rated value / maximum":"72 V","acc. to EN 60898 / rated value":"10 kA","Position / of power supply cord":"Any","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/02ba733fec86ecda1700c667fa64ee85.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=379642&mlfb=5SY4125-6CC","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY4125-6CC/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4125-6CC?","answer":"10 kA per EN 60898 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No. 235 — the UL figure governs if the panel is built to North American code."},{"question":"Where can I buy 5SY4125-6CC?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4125-6CC","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/5SY4125-6CC 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}}