{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7404-8MA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7404-8MA","canonicalUrl":"https://aoctrl.com/siemens/5SY7404-8MA","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7404-8MA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7404-8MA, miniature circuit breaker, 4 A, D tripping characteristic, 4-pole, 30 kA breaking capacity per IEC 60947-2, 400 V AC.","salesMarkdown":"## What this 4-pole D-curve MCB is for Occupies 4 width units (72 mm wide, 90 mm tall, 76 mm deep with 70 mm installation depth). The D tripping characteristic is the key selector: it allows 10–20× rated current before magnetic trip, so it won't drop out on motor inrush or transformer energization. Rated 400 V AC for multi-phase operation, 440 V AC for single-phase or multi-phase use. Mechanical endurance is 10,000 switching cycles typical. The magnetic-only design means no thermal bimetal — it responds to overcurrent only, not overload; pair it with a separate overload relay for motor protection.","metaTitle":"Siemens 5SY7404-8MA SENTRON MCB, 4A D-curve, 4-pole, 30kA","metaDescription":"Siemens SENTRON 5SY7404-8MA miniature circuit breaker, 4 A, D tripping characteristic, 4-pole, 30 kA breaking capacity per IEC 60947-2, 400 V AC. Active production, available to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY7404-8MA","Height":"90 mm","Maximum":"31 lbf·in","Minimum":"22 lbf·in","Sealable":"Yes","Rated Value":"50/60 Hz","description":"Miniature circuit breakers 400v Icu 30kA 4-pole, 4A, only magnetic","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","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","Design of the product":"Only magnetic tripping operation","Number of width units":"4","Number of poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","circuit-breaker / Design":"5SY7MA","Suitability for operation":"Industry","Current / at AC / rated value":"4 A","Tripping characteristic class":"D","at DC / rated value / maximum":"72 V","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"30 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","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"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9ae0ab65ca13dd129cfa8d61eaa6e03e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=696521&mlfb=5SY7404-8MA"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY7404-8MA?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What compliance documentation does Siemens provide for 5SY7404-8MA?","answer":"The part carries IEC 60947-2 certification for the 30 kA breaking capacity rating. It is halogen-free and silicon-free. Standard Siemens declarations of conformity (CE, UKCA) and RoHS/REACH statements are available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7404-8MA","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/5SY7404-8MA 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}}