{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3732","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3732","canonicalUrl":"https://aoctrl.com/siemens/5SP3732","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3732","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SP3 series, main miniature circuit breaker (SHU), selective, 1-pole, 32 A, E characteristic, 25 kA per EN 60898, 230 V AC, 50 Hz.","salesMarkdown":"The Siemens 5SP3732 is a SENTRON 5SP3 series main miniature circuit breaker — selective type (SHU), 1-pole, rated 32 A at 230 V AC, 50 Hz. The E tripping characteristic means it's designed for selective coordination downstream of a larger upstream device, holding through short-duration faults to keep the rest of the panel live. The 25 kA breaking capacity per EN 60898 is the headline number: it safely interrupts a 25 kA prospective fault current at 230 V without welding or arcing over, which is high for a 1-pole MCB — this is the part you spec when the available fault current at the panel is serious, not a residential load center. ## Selectivity and coordination The E curve is the key differentiator from a standard B or C curve. It has a wider magnetic trip band, so it tolerates higher inrush without nuisance tripping — exactly what you need when this MCB feeds a sub-distribution board or a motor starter with a soft-start. The 25 kA SCCR at 230 V AC means you can place it on a supply with up to 25 kA available fault current and still maintain the selective chain. For comparison, a standard 5SL series MCB with C-curve at 32 A typically breaks 6 kA or 10 kA; the 5SP3732's 25 kA is a full grade up in fault-handling capability. Terminals accept solid conductors 2.5 to 50 mm² and stranded 2.5 to 70 mm², which is generous for a 32 A breaker; you can land a 35 mm² feeder without pigtailing. Saddle terminals are included — no need for separate ferrule or pin terminal on the stranded side. Depth is 76.3 mm, enclosure depth 92 mm; leaves about 16 mm behind the front panel for wiring clearance.","metaTitle":"Siemens 5SP3732 SENTRON MCB, 1P 32A E-Curve, 25kA","metaDescription":"Siemens 5SP3732 SENTRON selective miniature circuit breaker, 1-pole 32 A, E tripping characteristic, 25 kA breaking capacity per EN 60898. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76.3 mm","Solid":"2.5 ... 50 mm²","Height":"128 mm","Maximum":"440 V","Minimum":"110 V","Sealable":"Yes","Stranded":"2.5 ... 70 mm²","Rated Value":"25 kA","Wertebereich":"-25 ... +55 °C","Mounting type":"standard rail","Number of poles":"1","lifecycle_stage":"current","Saddle Terminals":"Yes","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":"IP20, with connected conductors","Overvoltage category":"IV","Design of the product":"Main miniature circuit breaker","Number of width units":"2","Number of poles / Note":"1P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","Depth / of the enclosure":"92 mm","circuit-breaker / Design":"5SP3","Suitability for operation":"Residential buildings/infrastructure","Current / at AC / rated value":"32 A","Tripping characteristic class":"E","acc. to EN 60898 / rated value":"25 kA","Position / of power supply cord":"Any","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":"With accessories on 35 mm standard mounting rail or busbar or screw fixing","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":"$100.33","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=396612&mlfb=5SP3732","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SP3732/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SP3732?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SP3732?","answer":"25 kA per EN 60898 at 230 V AC. That's the rated short-circuit breaking capacity for this selective MCB."},{"question":"What wire sizes does 5SP3732 accept?","answer":"Solid conductors 2.5 to 50 mm² and stranded 2.5 to 70 mm². Saddle terminals are included."},{"question":"What is the depth of 5SP3732?","answer":"76.3 mm; enclosure depth is 92 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3732","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/5SP3732 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}}