{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3735-2KK02","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3735-2KK02","canonicalUrl":"https://aoctrl.com/siemens/5SP3735-2KK02","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2KK02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 series, miniature circuit breaker (MCB), 1-pole, 35 A rated current, E tripping characteristic, 25 kA breaking capacity, 230 V AC, busbar mount.","salesMarkdown":"The Siemens 5SP3735-2KK02 is a 1-pole SENTRON miniature circuit breaker with a 35 A rated current and a 25 kA breaking capacity at 230 V AC. It carries the E tripping characteristic, which means the magnetic trip is calibrated to operate between 10 and 20 times the rated current — a curve designed for protecting circuits with transformers, power supplies, or other loads that draw a brief inrush without nuisance tripping. On a 35 A breaker, that magnetic trip window sits between 350 A and 700 A, so it's a good fit for a distribution board feeding a mix of resistive and moderate inductive loads in a residential or infrastructure setting. ## Mounting and wiring — busbar fit, wire range, and enclosure depth This breaker mounts on a 40-mm busbar system per DIN 43870 Part 2, which is the standard for meter-panel distribution boards in European-style enclosures. It takes solid or stranded copper from 2.5 mm² up to 50 mm², so you can land a fairly heavy feeder on a single-pole device. The overall depth is 89.5 mm, and the enclosure depth allowance is 76.3 mm — that 13 mm difference tells you the busbar and terminal projection sit proud of the backplate, so factor that into your gland-plate and cover clearance. ## Breaking capacity and coordination — what the 25 kA rating buys you","metaTitle":"Siemens 5SP3735-2KK02 SENTRON MCB, 1P 35A E-Curve 25kA","metaDescription":"Siemens 5SP3735-2KK02 SENTRON miniature circuit breaker, 1-pole, 35 A, tripping characteristic E, 25 kA breaking capacity at 230 V AC. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","Solid":"2.5 ... 50 mm²","Height":"151.3 mm","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","Design of the locking device":"Locking slide with lock, additional wire seal, cable ties and Antilux","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=327937&mlfb=5SP3735-2KK02","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2KK02/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of the 5SP3735-2KK02?","answer":"The rated breaking capacity is 25 kA at 230 V AC per EN 60898, and it also carries a 25 kA rating per the same standard. That's enough for most residential and light-commercial meter-panel installations near a distribution transformer."},{"question":"What wire sizes does the 5SP3735-2KK02 accept?","answer":"It accepts solid and stranded copper conductors from 2.5 mm² up to 50 mm². That range covers everything from a standard branch circuit feeder up to a fairly heavy service conductor on a single-pole breaker."},{"question":"Where can I buy the 5SP3735-2KK02 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here, but the lifecycle is current so supply is not restricted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3735-2KK02","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/5SP3735-2KK02 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}}