{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4104-7CV","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4104-7CV","canonicalUrl":"https://aoctrl.com/siemens/5SY4104-7CV","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4104-7CV","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SY4104-7CV, 1-pole C-curve miniature circuit breaker, 4 A rated current, 15 kA breaking capacity per IEC 60947-2, 18 mm width.","salesMarkdown":"## What this MCB does on the rail The Siemens 5SY4104-7CV is a 1-pole miniature circuit breaker with C-curve tripping characteristic, rated 4 A at 230/400 V AC and breaking 15 kA per IEC 60947-2. The C-curve (5–10× In) handles motor inrush and transformer magnetizing currents without nuisance trips, while still protecting downstream wiring. Rated for 50/60 Hz supply, it fits standard 18 mm modular DIN-rail enclosures. ## Temperature derating — don't ignore it At 35 °C ambient the 5SY4104-7CV carries its full 4 A rating. Push the panel ambient to 50 °C and it derates to 3.4 A; at 55 °C it's 3.22 A. The thermal curve is published and repeatable, not a guess. Width is one modular unit (18 mm), depth 76 mm, height 90 mm. Mounting position is any; the breaker works upright, sideways, or inverted. Top and bottom combined terminals accept the same wire gauge, so line/load orientation doesn't matter.","metaTitle":"Siemens 5SY4104-7CV MCB, 1P C-4A, 15kA IEC 60947-2","metaDescription":"Siemens 5SY4104-7CV miniature circuit breaker, 1-pole C-curve 4A, 15kA breaking capacity per IEC 60947-2. Active 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","Width":"18 mm","title":"5SY4104-7CV","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60947-2","description":"MCB Icu=15KA 230/400V 1P C4","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","at AC rated value":"4 A","Installation Depth":"70 mm","Degree Of Pollution":"3","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","at 35 °C rated value":"4 A","at 40 °C rated value":"3.71 A","at 45 °C rated value":"3.55 A","at 50 °C rated value":"3.4 A","at 55 °C rated value":"3.22 A","according to EN 61346-2":"F","Combined Terminal Bottom":"Yes","according to IEC 81346-2":"F","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"1","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","Supply Voltage Frequency Rated Value":"50/60 Hz","according to IEC 60947-2 rated value":"15 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","operating voltage at DC rated value maximum":"72 V","with single-phase operation at AC rated value":"250 V","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.3 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a990a343170336677ad5b67edec49421.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1531864&mlfb=5SY4104-7CV"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4104-7CV?","answer":"15 kA per IEC 60947-2 at 230/400 V AC. That's the rated short-circuit breaking capacity — enough for most commercial and light industrial panelboards."},{"question":"Will 5SY4104-7CV drop into a panel specified for 5SY4106-7CV?","answer":"Yes — same 18 mm width, same DIN-rail mount, same terminal layout. The only difference is the current rating: 4 A vs 6 A. If the circuit load is under 4 A, it's a direct swap."},{"question":"What compliance documentation does Siemens provide for 5SY4104-7CV?","answer":"The breaker is certified to IEC / EN 60947-2. It's halogen-free and silicon-free. Standard Siemens declarations cover CE marking and RoHS compliance."},{"question":"How do I get current pricing and availability for 5SY4104-7CV?","answer":"Submit an RFQ through this listing. We source through independent distribution and confirm current pricing and availability at quote time — no automated stock figures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4104-7CV","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/5SY4104-7CV 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}}