{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3735-3","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3735-3","canonicalUrl":"https://aoctrl.com/siemens/5SP3735-3","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3735-3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 series, 1-pole miniature circuit breaker, 35 A, E characteristic, 25 kA rated breaking capacity, 230 V AC, 50 Hz, 1.5 width units, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SP3735-3 is a 1-pole miniature circuit breaker rated 35 A with an E tripping characteristic, designed for 230 V AC, 50 Hz systems. The E characteristic (class E) is a less common curve than B/C/D — it sits between C and K in magnetic trip threshold, typically used for transformer or motor-start protection where a moderate inrush delay is needed without the wide band of a K curve. At 35 A and 25 kA SCCR, this breaker handles general lighting and distribution loads in commercial or multi-residential subpanels where fault levels are high but load inrush is moderate. The 6 kV surge voltage resistance confirms it can withstand transient overvoltages typical at the service entrance without nuisance tripping or damage. Conductor cross-section from 2.5 mm² to 50 mm² (solid or stranded) via saddle terminals gives flexibility for both downstream branch wiring and incoming feeder cables. The 1.5 width units (approx. 27 mm on a 35 mm DIN rail) is wider than a standard 1-pole MCB — account for this when laying out the panel to avoid running out of rail space. The integrated locking slide accepts a padlock, wire seal, or cable tie — useful for lockout/tagout on a main breaker position. Supply cord can enter from any position (top or bottom feed), and infeed at the box terminal is supported — no forced orientation.","metaTitle":"Siemens 5SP3735-3 SENTRON MCB, 1P 35A E-Curve 25kA","metaDescription":"Siemens SENTRON 5SP3735-3 miniature circuit breaker, 1-pole, 35 A, E tripping characteristic, 25 kA breaking capacity per EN 60898. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76.3 mm","title":"5SP3735-3","Height":"128 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 1-pole, E 35, 230/400 V","Mounting type":"standard rail","Number of poles":"1","Solid / Maximum":"50 mm²","Solid / Minimum":"2.5 mm²","lifecycle_stage":"current","Saddle Terminals":"Yes","Shock resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product brand name":"SENTRON","Stranded / Maximum":"50 mm²","Stranded / Minimum":"2.5 mm²","Degree of pollution":"3","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","Design of the locking device":"Integrated locking slide, lockable by means of a lock, wire seal and cable ties","Tripping characteristic class":"E","acc. to EN 60898 / rated value":"25 kA","Position / of power supply cord":"Any","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","Operating current / at AC / rated value":"35 A","Mounting type / other installation / Note":"On standard mounting rail 35 mm acc. to EN 60715","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cafc4b5343ee0b13f65976cdb567d6de.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=342497&mlfb=5SP3735-3"},"ai":{"faq":[{"question":"What conductor sizes does the 5SP3735-3 accept?","answer":"The saddle terminals accept solid or stranded conductors from 2.5 mm² minimum up to 50 mm² maximum."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3735-3","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/5SP3735-3 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}}