{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3740-2KK01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3740-2KK01","canonicalUrl":"https://aoctrl.com/siemens/5SP3740-2KK01","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3740-2KK01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 miniature circuit breaker, 1-pole, 40 A, tripping characteristic E, 25 kA rated breaking capacity per EN 60898, 230 V AC, 50 Hz, busbar mount.","salesMarkdown":"The Siemens 5SP3740-2KK01 is a 1-pole SENTRON miniature circuit breaker rated 40 A with a tripping characteristic E, designed for busbar mounting on a 40-mm busbar system per DIN 43870 Part 2. It's built for residential and infrastructure panels — think meter cabinets, distribution boards, and building supply feeders where the E-curve's delayed magnetic trip handles transformer inrush or motor starting without nuisance trips. Rated breaking capacity of 25 kA per EN 60898 means this breaker can safely interrupt a fault current up to 25,000 A at 230 V AC — enough for most residential and light commercial service entrances where the prospective short-circuit current stays under that threshold. The 6 kV surge voltage resistance (overvoltage category IV) confirms it's rated for the mains-side of the meter, not just downstream subpanels. Solid and stranded conductors from 2.5 mm² up to 50 mm² fit the box terminal — that's a wide range covering everything from a 2.5 mm² lighting circuit to a 50 mm² main feeder. The infeed is at the box terminal, and the outgoing feeder uses a spring-loaded terminal, so you land the line side on the screw clamp and the load side on the cage clamp. No special tools beyond a screwdriver and a ferrule crimper for stranded tails. Depth of 89.5 mm (76.3 mm enclosure depth) and height of 151.3 mm — check your enclosure depth before committing. The 1.5 width units (roughly 27 mm on a standard DIN rail adapter) mean it takes up one and a half module spaces on the busbar.","metaTitle":"Siemens 5SP3740-2KK01 SENTRON MCB, 1P 40A E-Curve, 25kA","metaDescription":"Siemens 5SP3740-2KK01 SENTRON miniature circuit breaker, 1-pole 40A, tripping characteristic E, 25 kA breaking capacity per EN 60898. Busbar mount, 230 V AC, 50 Hz. Current lifecyc","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":"5SP3740-2KK01","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, E40A L1, 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":"40 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/265f670dec13f62ad090226352b1cc9d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=101602&mlfb=5SP3740-2KK01"},"ai":{"faq":[{"question":"Where can I buy 5SP3740-2KK01 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 5SP3740-2KK01's listed depth?","answer":"The overall depth is 89.5 mm; the enclosure depth alone is 76.3 mm. Verify your enclosure depth against the 89.5 mm figure before installing."},{"question":"What conductor sizes does 5SP3740-2KK01 accept?","answer":"Solid and stranded conductors from 2.5 mm² up to 50 mm² fit the box terminal on the line side. The load side uses a spring-loaded terminal."},{"question":"Will 5SP3740-2KK01 drop into a panel specified around 5SL6563-7BB without rewiring?","answer":"Not directly — the 5SP3740-2KK01 is a 1-pole busbar-mount MCB (1.5 width units) with a 40 A E-curve, while the 5SL6563-7BB is a different series with its own mounting and terminal layout. The busbar system (40 mm per DIN 43870 Part 2) may be compatible, but the terminal positions and conductor ranges differ; verify the physical fit and wiring scheme before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3740-2KK01","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/5SP3740-2KK01 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}}