{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY4432-8FA","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY4432-8FA","canonicalUrl":"https://aoctrl.com/siemens/5SY4432-8FA","factsUrl":"https://aoctrl.com/api/mcp/products/5SY4432-8FA","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY4432-8FA, 4-pole miniature circuit breaker, 32 A rated current, D tripping characteristic, 10 kA breaking capacity at 400 V AC, 4 module widths (72 mm).","salesMarkdown":"## 32 A D-curve 4-pole MCB for industrial branch circuits The Siemens 5SY4432-8FA is a SENTRON miniature circuit breaker rated 32 A with a D tripping characteristic, 4 poles, and a 10 kA breaking capacity at 400 V AC per EN 60898. Rated voltage is 400 V AC across poles, with a maximum DC rating of 72 V. The 4-pole configuration (4P) switches all phases and does not switch the neutral — confirmed by the neutral conductor switching function being set to No. This is typical for 3-phase industrial loads where the neutral is bonded at the panel. ## DIN-rail footprint and wiring The quick-assembly mounting system snaps onto the rail without tools. Accepts solid or stranded conductors from 0.75 to 35 mm² at the screw terminals, torqued to 3.5 N·m. Mounting position is any, which helps in tight enclosures. ## Construction features Sealable design allows locking the breaker in the ON or OFF position for lockout/tagout compliance. Touch protection is integrated on the terminals.","metaTitle":"Siemens 5SY4432-8FA SENTRON MCB, 32 A D-curve 4-pole, 10 kA","metaDescription":"Siemens 5SY4432-8FA SENTRON miniature circuit breaker, 32 A rated, D tripping characteristic, 4-pole, 10 kA breaking capacity at 400 V AC. Current production. Available to order ag","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Solid":"0.75 ... 35 mm²","Width":"72 mm","title":"5SY4432-8FA","Height":"90 mm","Sealable":"Yes","Stranded":"0.75 ... 35 mm²","Rated Value":"50/60 Hz","description":"Miniature circuit breaker 400 V 10kA, 4-pole, 32 A, D=70 mm as counter preliminary miniature circuit breaker","Halogen-Free":"Yes","Silicon-Free":"Yes","Mounting type":"Quick assembly system","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °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","Design of the product":"As automatic meter","Number of width units":"4","Number of poles / Note":"4P","acc. to DIN EN 81346-2":"F","Combined Terminal Bottom":"Yes","Suitability for operation":"Mechanical engineering / industry","Current / at AC / rated value":"32 A","Tripping characteristic class":"D","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","Tightening torque / with screw-type terminals":"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":"31 lbf·in","AWG number / as coded connectable conductor cross section":"18 ... 4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/601249860febe06132802f489798c0d2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=333040&mlfb=5SY4432-8FA"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SY4432-8FA?","answer":"10 kA at 400 V AC per EN 60898. That is the standard interrupting rating for this class of MCB in industrial branch circuits."},{"question":"What wire sizes does 5SY4432-8FA accept?","answer":"Solid or stranded conductors from 0.75 mm² up to 35 mm² at the screw terminals, torqued to 3.5 N·m."},{"question":"Where can I buy 5SY4432-8FA and how is it quoted?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or prices are published here."},{"question":"What is the physical size of 5SY4432-8FA?","answer":"72 mm wide (4 module widths), 90 mm tall, 76 mm deep. Installation depth is 70 mm on the DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY4432-8FA","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/5SY4432-8FA 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}}