{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SP3816-2","brand":"Siemens","brandSlug":"siemens","productSlug":"5SP3816-2","canonicalUrl":"https://aoctrl.com/siemens/5SP3816-2","factsUrl":"https://aoctrl.com/api/mcp/products/5SP3816-2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, miniature circuit breaker, 5SP3816-2, 3-pole, 16 A, 25 kA, characteristic E, 400 V AC, IP40.","salesMarkdown":"## What the 25 kA breaking capacity means for your panel The Siemens 5SP3816-2 is a 3-pole SENTRON miniature circuit breaker rated 16 A at 400 V AC with a 25 kA breaking capacity per EN 60898. ## Characteristic E — what it changes for coordination Characteristic E is a selective (time-delayed) trip curve, not the standard B/C/D you see on branch MCBs. It's designed to ride through inrush and short-duration overloads so that a downstream fault clears first — selectivity without a fuse. The 5SP3816-2 holds longer on overload before tripping, which matters when you're coordinating a main breaker with sub-feed breakers in a meter panel or distribution board. ## Temperature derating — the real current rating At 40 °C it derates to 15.2 A, at 45 °C to 14.8 A, at 50 °C to 14.4 A, and at 55 °C to 14 A. ## Physical fit — panel and enclosure dimensions The 5SP3816-2 occupies 4.5 modular width units (MW) on a DIN rail. Overall depth is 89.5 mm; enclosure depth is 76.3 mm. Height is 151.3 mm. Conductor cross-section accepts 2.5 to 50 mm² solid or stranded — enough for the incoming supply cable on a main breaker. Fastening is via busbar, and the box terminal allows infeed from either end. IP40 with conductors connected; sealable with the locking slide, wire seal, cable ties, or Antilux.","metaTitle":"Siemens 5SP3816-2 SENTRON MCB, 3P, 16A, 25kA, Char E","metaDescription":"Siemens 5SP3816-2 SENTRON 3-pole miniature circuit breaker, 16 A, 25 kA breaking capacity, tripping characteristic E, 400 V AC, IP40, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Depth":"89.5 mm","title":"5SP3816-2","Height":"151.3 mm","Maximum":"70 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"25 kA","description":"Main miniature circuit breaker (SHU), 3x 1-pole, E 16A, 230/400 V Mounting on 40 mm busbars","Number Of Poles":"3","Solid / Maximum":"50 mm²","Solid / Minimum":"2.5 mm²","lifecycle_stage":"current","Fastening Method":"Busbar","Shock Resistance":"30 g, at least 3 impacts, impact duration 11 ms","Product Brand Name":"SENTRON","Stranded / Maximum":"50 mm²","Stranded / Minimum":"2.5 mm²","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at AC / rated value":"16 A","protection class IP":"IP40, with connected conductors","Overvoltage Category":"IV","Design Of The Product":"Main miniature circuit breaker","Infeed At Box Terminal":"Yes","Number Of Poles / Note":"3P","acc. to DIN EN 61346-2":"F","at 30 °C / rated value":"16 A","at 40 °C / rated value":"15.2 A","at 45 °C / rated value":"14.8 A","at 50 °C / rated value":"14.4 A","at 55 °C / rated value":"14 A","Depth / Of The Enclosure":"76.3 mm","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":"4.5","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":"400 V","Surge Voltage Resistance / Rated Value":"6 kV","Outgoing Feeder Via Spring-Loaded Terminal":"Yes","Fastening Method / Other Installation / Note":"On 40-mm busbar system in compliance with DIN 43870 Part 2","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 (Operating Cycles) / Typical":"20 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3b9cb6b5f5a3a606392e9ab3a0b52cf9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=396591&mlfb=5SP3816-2"},"ai":{"faq":[{"question":"What is the 5SP3816-2's breaking capacity?","answer":"25 kA at 400 V AC per EN 60898, and 25 kA rated value overall."},{"question":"What does tripping characteristic E mean?","answer":"Characteristic E is a selective (time-delayed) curve — it holds longer on overload than B, C, or D to maintain selectivity with downstream breakers. It's specified for main or upstream positions in distribution."},{"question":"Where can I buy the 5SP3816-2?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the physical dimensions of the 5SP3816-2?","answer":"Depth 89.5 mm, enclosure depth 76.3 mm, height 151.3 mm, width 4.5 modular units."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SP3816-2","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/5SP3816-2 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}}