{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY8432-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY8432-8","canonicalUrl":"https://aoctrl.com/siemens/5SY8432-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SY8432-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY8432-8, 4-pole miniature circuit breaker, D tripping characteristic, 32 A rated, 30 kA breaking capacity at 400 V AC per IEC 60947-2, 4 modular width units.","salesMarkdown":"The 5SY8432-8: The D-curve means the magnetic trip threshold is 10–20× In, so it holds through the startup surge of a 32 A motor or a bank of switched-mode supplies without dropping out. At 32 A rated current, it's sized for a 3-phase load drawing about 22 kW at 400 V. The 15 kA DC rating at 72 V max covers control-circuit protection in DC bus applications, though it's primarily an AC breaker. Temperature derating is built in: at 45 °C it still carries the full 32 A, but at 55 °C it's 30.37 A, and at 50 °C it's 31.2 A (–). Mounting position is any, so vertical or horizontal orientation is fine. Current-production part in the Siemens SENTRON family. No LTB or phase-out notice. The 5SY8432-8 carries the SENTRON brand designation and is classified per EN 61346-2 and IEC 81346-2 as function F. Vibration resistance tested per IEC 60068-2-6 — ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz — so it holds up on machinery with moderate vibration. The sealable feature allows tamper-proof locking of the toggle, useful for critical circuits.","metaTitle":"Siemens 5SY8432-8 SENTRON MCB, 4P D 32 A, 30 kA","metaDescription":"Siemens 5SY8432-8 SENTRON 4-pole MCB, D-curve, 32 A rated, 30 kA breaking capacity at 400 V AC per IEC 60947-2. Current production. Sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","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":"32 A","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","according to EN 61346-2":"F","at 45 °C / rated value":"32 A","at 50 °C / rated value":"31.2 A","at 55 °C / rated value":"30.37 A","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":"4","Tripping Characteristic Class":"D","Position / Of Power Supply Cord":"Any","according to IEC 60947-2 / rated value":"30 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","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/58601764fc6269500b0f9883c181d35e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=100820&mlfb=5SY8432-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY8432-8/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SY8432-8?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through independent distribution channels — no live figures on the page, but the part is a standard production item and routinely available to order."},{"question":"What is 5SY8432-8's listed depth (76 mm) on this component line?","answer":"The overall depth is 76 mm, with an installation depth of 70 mm. That's the dimension from the DIN-rail mounting surface to the front of the breaker body, excluding the toggle."},{"question":"Will 5SY8432-8 drop into a panel that was specified around 5SY7210-7CC without rewiring?","answer":"Not directly — the 5SY7210-7CC is a different pole count and rating. The 5SY8432-8 is a 4-pole D-curve 32 A breaker, while the 5SY7210-7CC is a different variant. Check the existing panel's busbar arrangement and load current before swapping; the footprint (4 MW vs whatever the 5SY7210-7CC uses) may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY8432-8","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/5SY8432-8 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}}