{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3720-2KK01","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3720-2KK01","canonicalUrl":"https://aoctrl.com/siemens/5SP3720-2KK01","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3720-2KK01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, miniature circuit breaker, 1-pole, E characteristic, 25 kA, 230 V AC, 50 Hz, IP40.","salesMarkdown":"## Siemens 5SP3720-2KK01 — SENTRON 1-Pole MCB, E-Curve, 25 kA The Siemens 5SP3720-2KK01 is a 1-pole SENTRON main miniature circuit breaker (SHU) with an E tripping characteristic, rated 230 V AC at 50 Hz and a 25 kA breaking capacity per EN 60898. The 1.5 modular-width unit (27 mm) mounts on a 40-mm busbar system per DIN 43870 Part 2, with the supply feed stipulated for the lower section of the meter panel. The 25 kA breaking capacity at 230 V AC (per EN 60898) is the headline number — it tells you this MCB can safely interrupt a fault current up to 25,000 A without welding its contacts or exploding the arc chamber. That's a high-interrupting rating for a domestic-metering form factor; most standard MCBs top out at 10 or 16 kA. The E tripping characteristic means the magnetic release is set higher than a B or C curve — typically 10–20× In — so it's deliberately slow on short-circuit to coordinate with upstream fuses or a main breaker. If you're feeding a sub-distribution board or a transformer, this is the curve that keeps the lights on during a downstream fault. Rated insulation voltage (Ui) is 690 V, and the overvoltage category is IV — that's the highest category for mains-connected equipment, meaning it's designed for the meter side of the installation where surge levels are worst. Terminal capacity accepts 2.5 to 50 mm² solid or stranded — that's a wide range, from a 2.5 mm² lighting circuit up to a 50 mm² main feeder. The outgoing feeder uses a spring-loaded terminal; the infeed is a box terminal. Both are sealable via a locking slide with provision for a lock, wire seal, cable ties, or Antilux seal — important for utility metering panels where tamper evidence is required. Mechanical service life is 20,000 operating cycles typical. Vibration resistance is 2 g per IEC 60068-2-6; shock resistance is 30 g, 3 impacts, 11 ms duration.","metaTitle":"Siemens 5SP3720-2KK01 SENTRON MCB, 1P, E-Curve, 25 kA","metaDescription":"Siemens 5SP3720-2KK01 SENTRON 1-pole miniature circuit breaker, E tripping characteristic, 25 kA breaking capacity at 230 V AC. Active production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","title":"5SP3720-2KK01","Height":"151.3 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 1-pole, E20A L1, 230/400 V","Solid Maximum":"50 mm²","Solid Minimum":"2.5 mm²","Design Of Pole":"1P","Number Of Poles":"1","lifecycle_stage":"current","Fastening Method":"Busbar","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Stranded Maximum":"50 mm²","Stranded Minimum":"2.5 mm²","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP40, with connected conductors","Overvoltage Category":"IV","Design Of The Product":"Main miniature circuit breaker","Depth Of The Enclosure":"76.3 mm","Fastening Method Other":"on 40-mm busbar system in compliance with DIN 43870 Part 2","Infeed At Box Terminal":"Yes","Suitability For Operation":"Residential buildings/infrastructure","Design Of The Locking Device":"Locking slide with lock, additional wire seal, cable ties and Antilux","Number Of Modular Width Units":"1.5","Position Of Power Supply Cord":"Stipulated by installation in the lower section of the meter panel","Tripping Characteristic Class":"E","supply voltage at AC rated value":"230 V","according to EN 60898 rated value":"25 kA","insulation voltage (Ui) rated value":"690 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"6 kV","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Display Version For Switch Position Indicator":"OFF = green, ON = red","vibration resistance according to IEC 60068-2-6":"2 g, 20 frequency cycles 5 to 150 to 15 Hz","Mechanical Service Life (Operating Cycles) Typical":"20 000","power loss [W] for rated value of the current at AC in hot operating state per pole":"6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ef130a6ac76d62c340de6dda663f53c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=182493&mlfb=5SP3720-2KK01"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SP3720-2KK01?","answer":"The rated breaking capacity is 25 kA at 230 V AC per EN 60898."},{"question":"What does the E tripping characteristic mean?","answer":"The E curve has a higher magnetic trip threshold than B or C curves — typically 10–20× rated current — making it suitable for applications with high inrush, such as distribution transformers or long cable runs, where nuisance tripping must be avoided."},{"question":"Where can I buy 5SP3720-2KK01 and how is it quoted?","answer":"This part is sourced to order through our independent distribution channel. Submit an RFQ for current availability and pricing — confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3720-2KK01","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/5SP3720-2KK01 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}}