{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3750-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3750-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3750-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3750-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3750-2, 1-pole miniature circuit breaker, 50 A rated current, tripping characteristic E, 25 kA breaking capacity per EN 60898, 230 V AC, 50 Hz.","salesMarkdown":"The Siemens 5SP3750-2 is a 1-pole SENTRON miniature circuit breaker rated 50 A at 230 V AC, 50 Hz, with tripping characteristic E and a breaking capacity of 25 kA per EN 60898. Characteristic E is a delayed thermal-magnetic curve designed for motor circuits and other loads with high inrush current. It trips magnetically at 10 to 20 times rated current (500–1000 A for this 50 A unit), so it won't nuisance-trip on a motor start but clears fast on a bolted fault. ## Rated for the panel environment Mounts on a 40-mm busbar system per DIN 43870 Part 2 — the standard meter-panel busbar grid. It occupies 1.5 width units (about 27 mm on a DIN rail), so panel density is decent. Depth is 89.5 mm including the enclosure, with 76.3 mm enclosure depth; that fits most meter cabinets without hitting the cover. Infeed is via box terminal, outgoing via spring-loaded terminal, which speeds wiring on a production panel build. IP40 with conductors connected; fine for a dry indoor meter board, not for washdown.","metaTitle":"Siemens 5SP3750-2 SENTRON MCB, 50 A, 1P, Char E, 25 kA","metaDescription":"Siemens 5SP3750-2 SENTRON miniature circuit breaker, 50 A, 1-pole, tripping characteristic E, 25 kA breaking capacity per EN 60898. Active production, sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","Solid":"2.5 ... 50 mm²","title":"5SP3750-2","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, E 50A, 230/400 V (block with L1, L2, L3)","Wertebereich":"-25 ... +55 °C","Mounting type":"Busbar","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":"-40 ... +70 °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","Current / at AC / rated value":"50 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/d07afa8a8b8ec85c3000d394ad338d76.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=475332&mlfb=5SP3750-2"},"ai":{"faq":[{"question":"What is 5SP3750-2's rated breaking capacity?","answer":"25 kA per EN 60898 at 230 V AC, 50 Hz."},{"question":"What tripping characteristic does the 5SP3750-2 use?","answer":"Characteristic E — magnetic trip at 10–20× rated current, suited for motor circuits."},{"question":"What conductor sizes does the 5SP3750-2 accept?","answer":"Solid or stranded from 2.5 mm² up to 50 mm²."},{"question":"Where can I buy 5SP3750-2 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"Will 5SP3750-2 drop into a panel specified around 5SL6563-7BB without rewiring?","answer":"No — 5SL6563-7BB is a different SENTRON series with different dimensions and terminal layout. The 5SP3750-2 uses a 40-mm busbar mount and spring-loaded outgoing terminals; verify panel cutout and busbar spacing before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3750-2","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/5SP3750-2 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}}