{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7105-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7105-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7105-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7105-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7105-7, 1-pole miniature circuit breaker, 0.5 A rated current, C tripping characteristic, 15 kA (EN 60898) / 50 kA (IEC 60947-2) breaking capacity, 18 mm wide, IP20.","salesMarkdown":"## Siemens 5SY7105-7 — 0.5 A C-Curve MCB for Control and Lighting Circuits It carries a 15 kA breaking capacity per EN 60898-1 and a 50 kA rating per IEC 60947-2 / UL1077, meaning it can safely interrupt fault currents up to those levels without upstream cascading — critical for selectivity coordination in a distribution board. The 0.5 A rated current at 35 °C derates to 0.47 A at 40 °C and 0.4 A at 60 °C (–). If your enclosure runs warm — say, next to a transformer or drive — size the load below the derated figure, not the 35 °C number. The C-curve trips magnetically at 5–10× In, so it's suited for moderate inrush loads like contactor coils or small transformers, not pure resistive heaters (use B-curve) or heavy motor starts (use D-curve). The dual breaking capacity — 15 kA per EN 60898 and 50 kA per IEC 60947-2 — reflects the same hardware tested to two standards. The 50 kA figure applies when the breaker is used as a distribution circuit breaker per 60947-2; the 15 kA figure applies when used as a domestic/industrial MCB per 60898. For industrial panels, treat the 50 kA as your SCCR headroom, but verify the upstream fuse or breaker limits the prospective fault current to that value. Mounting position is any; installation depth is 70 mm. Sealable allows lockout/tagout compliance.","metaTitle":"Siemens 5SY7105-7 SENTRON MCB, 1P, 0.5 A, C-Curve, 15/50 kA","metaDescription":"Siemens 5SY7105-7 SENTRON miniature circuit breaker, 1-pole, 0.5 A, C characteristic, 15 kA (EN 60898) / 50 kA (IEC 60947-2). Current production. Quoted 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","Width":"18 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","at AC / rated value":"0.5 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","according to EN 61346-2":"F","at 35 °C / rated value":"0.5 A","at 40 °C / rated value":"0.47 A","at 45 °C / rated value":"0.45 A","at 50 °C / rated value":"0.44 A","at 55 °C / rated value":"0.42 A","at 60 °C / rated value":"0.4 A","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"1","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Any","Product Feature / Touch Protection":"Yes","according to EN 60898 / rated value":"15 kA","according to IEC 60947-2 / rated value":"50 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage / Of The Operating Voltage":"AC","Value Range / Of The Supply Voltage Frequency":"50/60 Hz","at DC / according to IEC 60947-2 / rated value":"15 kA","Product Component / Neutral Conductor Switching":"No","with multi-phase operation / at AC / rated value":"440 V","operating voltage / at DC / rated value / maximum":"72 V","vibration resistance / according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","with single-phase operation / at AC / rated value":"440 V","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8134310ef203725f7c5a8c58a8990e36.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=298428&mlfb=5SY7105-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7105-7/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SY7105-7?","answer":"15 kA per EN 60898-1 and 50 kA per IEC 60947-2 / UL1077. The higher figure applies when the breaker is used as a distribution circuit breaker per 60947-2."},{"question":"What compliance documentation does Siemens provide for the 5SY7105-7?","answer":"The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. It is halogen-free and silicon-free. RoHS and REACH declarations are standard from Siemens for this series."},{"question":"Where can I buy the 5SY7105-7 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7105-7","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/5SY7105-7 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}}