{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3735-2KK03","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3735-2KK03","canonicalUrl":"https://aoctrl.com/siemens/5SP3735-2KK03","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3735-2KK03","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 series, main miniature circuit breaker, 1-pole, 35 A, tripping characteristic E, 25 kA rated breaking capacity per EN 60898, 230 V AC, busbar mount.","salesMarkdown":"The Siemens 5SP3735-2KK03 is a 1-pole SENTRON miniature circuit breaker from the 5SP3 series, rated 35 A at 230 V AC with a tripping characteristic E and a 25 kA breaking capacity per EN 60898. It is designed as a main MCB for residential and infrastructure metering panels, mounting on a 40-mm busbar system per DIN 43870 Part 2. At 35 A and 230 V AC, it handles the main feed for a residential or light commercial meter panel. The 6 kV surge voltage resistance confirms it can withstand lightning-induced surges at the service entrance. The 1.5 width units (each 18 mm) means it occupies 27 mm on the DIN rail — a standard single-pole MCB is 1 width unit, so this is wider to accommodate the higher breaking capacity and the E-curve mechanism. Verify the panel's width allocation before swapping from a standard 1-pole unit. Mounts on a 40-mm busbar system per DIN 43870 Part 2, typical in European meter panels. The infeed is at the box terminal (bottom), with the outgoing feeder via a spring-loaded terminal — no screw tightening needed on the load side. The locking slide accepts a padlock, wire seal, cable ties, or Antilux seal — useful for utility-lockable metering panels where tamper evidence is required. The switch position indicator shows OFF = green, ON = red, a visual cue that matches standard European practice. Ambient range -25 to +55 °C covers most utility rooms; storage range -40 to +70 °C covers transport and warehouse.","metaTitle":"Siemens 5SP3735-2KK03 SENTRON MCB, 1P 35A E-Curve 25kA","metaDescription":"Siemens 5SP3735-2KK03 SENTRON 1-pole MCB, 35A, tripping characteristic E, 25kA breaking capacity per EN 60898. Busbar mount, 1.5 width units. Current lifecycle stage, quoted to ord","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","title":"5SP3735-2KK03","Height":"151.3 mm","Maximum":"440 V","Minimum":"110 V","Sealable":"Yes","Stranded":"2.5 ... 50 mm²","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 1-pole, E35A L3, 230/400 V","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9d33c3266ac5eeafb7a4c39f356b6051.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=310537&mlfb=5SP3735-2KK03"},"ai":{"faq":[{"question":"What is the 5SP3735-2KK03's rated breaking capacity?","answer":"25 kA per EN 60898 at 230 V AC, which is the standard for a main service-entrance MCB in residential and light commercial metering panels."},{"question":"What does tripping characteristic E mean?","answer":"It trips between 10× and 20× the rated current (350 A to 700 A for this 35 A unit), designed for loads with high inrush like transformers or small motors — not for general lighting or resistive circuits."},{"question":"Where can I buy the 5SP3735-2KK03 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quote — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3735-2KK03","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/5SP3735-2KK03 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}}