{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3735-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3735-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3735-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON main miniature circuit breaker (SHU), 1-pole, E characteristic, 35 A, 230/400 V, 25 kA breaking capacity per EN 60898, for busbar mounting on 40 mm system per DIN 43870 Part 2.","salesMarkdown":"The Siemens SENTRON 5SP3735-2 is a 1-pole main miniature circuit breaker (SHU designation) with an E tripping characteristic, rated 35 A at 230 V / 50 Hz supply voltage. The insulation voltage (Ui) is rated 690 V, and surge voltage resistance is 6 kV, placing it in overvoltage category IV, suitable for the utility-side of the installation. Fastens via busbar onto a 40 mm busbar system per DIN 43870 Part 2, with an alternative fastening method also on busbar. Occupies 1.5 modular width units; the enclosure depth is 76.3 mm, overall depth 89.5 mm, height 151.3 mm. Infeed is at the box terminal; the outgoing feeder uses a spring-loaded terminal. Conductor range: solid or stranded 2.5 mm² minimum to 50 mm² maximum. The switch position indicator shows OFF = green, ON = red. ## Environmental and mechanical ratings Protection class IP40 with connected conductors. Shock resistance: 30 g, at least 3 impacts, 11 ms duration. Vibration resistance per IEC 60068-2-6: 2 g, 20 frequency cycles 5 to 150 to 15 Hz. Mechanical service life: 20,000 operating cycles typical. Sealable for metering applications.","metaTitle":"Siemens 5SP3735-2 SENTRON Main MCB, 1P E-Curve 35A 25kA","metaDescription":"Siemens SENTRON 5SP3735-2 main miniature circuit breaker, 1-pole, E characteristic, 35A, 230/400V, 25kA breaking capacity per EN 60898. Current lifecycle stage. Quoted to order aga","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","title":"5SP3735-2","Height":"151.3 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 1-pole, E 35A, 230/400 V (block with L1, L2, L3)","Solid Maximum":"50 mm²","Solid Minimum":"2.5 mm²","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Busbar","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Stranded Maximum":"50 mm²","Stranded Minimum":"2.5 mm²","Product Brand Name":"SENTRON","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","Depth Of The Enclosure":"76.3 mm","Fastening Method Other":"on 40-mm busbar system in compliance with DIN 43870 Part 2","Infeed At Box Terminal":"Yes","Suitability For Operation":"Residential buildings/infrastructure","Number Of Modular Width Units":"1.5","Position Of Power Supply Cord":"Stipulated by installation in the lower section of the meter panel","Tripping Characteristic Class":"E","supply voltage at AC rated value":"230 V","according to EN 60898 rated value":"25 kA","insulation voltage (Ui) rated value":"690 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"6 kV","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Display Version For Switch Position Indicator":"OFF = green, ON = red","vibration resistance according to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Mechanical Service Life (Operating Cycles) Typical":"20 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"6.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d286649ba091d9badbef55d390db4f1b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=204300&mlfb=5SP3735-2"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SP3735-2?","answer":"Rated 25 kA per EN 60898 at 230 V AC, 50 Hz. That's the maximum prospective fault current it can safely interrupt under standard test conditions."},{"question":"What does the E tripping characteristic mean?","answer":"The E curve is a Siemens-specific characteristic for main miniature circuit breakers (SHU), with a higher magnetic trip threshold than B or C curves — designed for selective coordination with downstream MCBs in residential or infrastructure main panels."},{"question":"What conductor sizes does 5SP3735-2 accept?","answer":"Solid or stranded conductors from 2.5 mm² minimum up to 50 mm² maximum. The outgoing feeder uses a spring-loaded terminal."},{"question":"Where can I buy 5SP3735-2?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an inquiry for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3735-2","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/5SP3735-2 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}}