{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3648-8","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3648-8","canonicalUrl":"https://aoctrl.com/siemens/5SM3648-8","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3648-8","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON selective RCCB, 4-pole, type A, In: 100 A, IΔn: 300 mA, Un AC: 400 V, 10 kA SCCR, DIN rail mount.","salesMarkdown":"The Siemens 5SM3648-8 is a SENTRON selective residual current circuit breaker (RCCB), 4-pole, type A, rated 100 A with a 300 mA residual operating current and 400 V AC at 50 Hz. The selective design (short-time delayed) means it coordinates with downstream RCCBs — in a fault, the downstream device trips first, keeping supply to the rest of the distribution board. That 300 mA threshold is sized for whole-circuit protection rather than individual equipment, so it suits sub-distribution boards feeding multiple final circuits. The 1 kA rating per EN 60898 is a separate standard for domestic-type breakers; the 10 kA figure governs industrial installation. Type A detection covers AC residual currents and pulsating DC — the common waveform from single-phase rectifiers in electronics, drives, and LED lighting. The 300 mA sensitivity is deliberately less sensitive than a 30 mA unit, so it won't nuisance-trip on normal leakage from long cable runs or multiple loads. Depth is 77 mm, installation depth 70 mm — verify enclosure depth if the panel has a shallow backplate or door-mounted devices. IP20 with conductors connected and distribution board installed — not rated for wet or dusty environments. Silicon-free construction, which matters for potting or conformal-coating compatibility in sensitive electronics enclosures.","metaTitle":"Siemens 5SM3648-8 SENTRON RCCB, 4-pole, 100 A, 300 mA, selec","metaDescription":"Siemens 5SM3648-8 SENTRON selective RCCB, 4-pole, type A, 100 A, 300 mA, 400 V AC, 10 kA SCCR. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Selective","Product Feature Silicon-Free":"Yes","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"top or bottom","according to EN 60898 rated value":"1 kA","according to IEC 61008-1 rated value":"1 kA","Switching Function Short-Term Delayed":"No","Value Range Of The Operating Frequency":"50 Hz","value range of the supply voltage at AC":"400 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","for rated value of the current at AC in hot operating state per pole":"8.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=481452&mlfb=5SM3648-8","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3648-8/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SM3648-8 and what is the price?","answer":"The 5SM3648-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is 5SM3648-8's depth and width for panel fit?","answer":"Depth is 77 mm, width is 72 mm (4 modular width units). Installation depth is 70 mm."},{"question":"Will 5SM3648-8 drop into a panel specified around 5SL4363-7?","answer":"No — 5SL4363-7 is a 3-pole miniature circuit breaker (MCB) at 54 mm wide, while 5SM3648-8 is a 4-pole RCCB at 72 mm wide. They serve different functions and occupy different DIN-rail space; rewiring and panel layout changes would be required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3648-8","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/5SM3648-8 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}}