{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3735-2XX03","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3735-2XX03","canonicalUrl":"https://aoctrl.com/siemens/5SP3735-2XX03","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2XX03","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3, main miniature circuit breaker (SHU), 1-pole, 35 A rated current, tripping characteristic E, 25 kA breaking capacity per EN 60898, 230/400 V AC, busbar mount.","salesMarkdown":"The Siemens 5SP3735-2XX03 is a SENTRON 5SP3 main miniature circuit breaker (MCB), also designated a main circuit breaker (SHU) for residential and infrastructure metering panels. It is a 1-pole device rated 35 A at 230/400 V AC, 50 Hz, with a tripping characteristic E — a curve designed for selective coordination with downstream MCBs in distribution boards, offering a delayed thermal-magnetic response that reduces nuisance tripping on transformer inrush or motor starting loads. Overvoltage category IV confirms it is rated for the utility-side interface, not just downstream distribution. Wire acceptance is generous: solid and stranded conductors from 2.5 mm² up to 50 mm², which covers meter tails and main feeder cables. The box terminal infeed and spring-loaded outgoing terminal simplify panel wiring — no special lugs needed for the larger cross-sections. Mounts on a 40-mm busbar system per DIN 43870 Part 2. Occupies 1.5 width units. Depth is 76.3 mm. Suitable for indoor panel environments only. The switch position indicator shows OFF = green, ON = red, a quick visual for commissioning or fault-finding. Shock resistance is 30 g for at least 3 impacts at 11 ms duration; vibration resistance per IEC 60068-2-6 at 2 g over 5 to 150 Hz. Mechanical service life is 20 000 switching cycles typical.","metaTitle":"Siemens 5SP3735-2XX03 SENTRON MCB, 1P, 35 A, E-Curve, 25 kA","metaDescription":"Siemens 5SP3735-2XX03 SENTRON main miniature circuit breaker, 1-pole, 35 A, tripping characteristic E, 25 kA breaking capacity per EN 60898. 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":{"Solid":"2.5 ... 50 mm²","Maximum":"440 V","Minimum":"110 V","Sealable":"Yes","Stranded":"2.5 ... 50 mm²","Rated Value":"25 kA","Mounting type":"Busbar","During Storage":"-40 ... +70 °C","Number of poles":"1","lifecycle_stage":"current","Shock resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"Miniature circuit breaker","Protection class IP":"IP40, with connected conductors","Overvoltage category":"IV","Design of the product":"Main miniature circuit breaker","Number of width units":"1.5","Infeed at box terminal":"Yes","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Depth / of the enclosure":"76.3 mm","circuit-breaker / Design":"5SP3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"35 A","Tripping characteristic class":"E","acc. to EN 60898 / rated value":"25 kA","Position / of power supply cord":"Stipulated by installation in the lower section of the meter panel","Insulation voltage / rated value":"690 V","Supply voltage / at AC / rated value":"230 V","Supply voltage frequency / rated value":"50 Hz","Surge voltage resistance / rated value":"6 kV","Mounting type / other installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Vibration resistance / acc. to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Display version / for switch position indicator":"OFF = green, ON = red","Mechanical service life (switching cycles) / typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=218573&mlfb=5SP3735-2XX03","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2XX03/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does 5SP3735-2XX03 accept?","answer":"Solid and stranded conductors from 2.5 mm² up to 50 mm² — covers meter tails and main feeder cables without special lugs."},{"question":"What is the tripping characteristic E used for?","answer":"Characteristic E provides a delayed thermal-magnetic response designed for selective coordination with downstream MCBs, reducing nuisance tripping on transformer inrush or motor starting loads in distribution boards."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3735-2XX03","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/5SP3735-2XX03 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}}