{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM1656-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM1656-6","canonicalUrl":"https://aoctrl.com/siemens/5SM1656-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM1656-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM1 series RCCB, 4-pole, 63 A rated at 40 °C, 300 mA Type A residual current, 10 kA short-circuit current rating, DIN rail mount, instantaneous.","salesMarkdown":"The Siemens 5SM1656-6 is a SENTRON 5SM1-series residual current circuit breaker (RCCB), 4-pole, rated 63 A at 40 °C and 45 °C, with a 300 mA Type A tripping characteristic and a 10 kA short-circuit current rating. It mounts on DIN rail (REG), occupies 4 width units (about 72 mm), and installs 55 mm deep — a standard panel footprint for a 4P RCCB. Instantaneous design (no short-time delay) means it trips within 40 ms at rated residual; use it where selectivity against upstream delayed RCCBs is not required. Rated supply voltage is 500 V AC, overvoltage category III, so it handles the utility-side transient environment typical of main distribution boards and sub-distribution panels. Finger and back-of-hand safe per the protection-against-electrical-shock listing — the terminals are shrouded enough for live-panel work with the deadfront on. Full 63 A holds up to 45 °C ambient. Above that, derate: 60.48 A at 50 °C, 57.96 A at 55 °C, 55.44 A at 60 °C, 52.92 A at 65 °C, 50.4 A at 70 °C. If the panel internal temperature exceeds 45 °C — common in a crowded enclosure with upstream breakers — the 50 °C derating line is the one to design against. Terminal torque spec is 2.5 to 3 N·m, accepting solid or stranded conductors from 1.5 mm² up to 25 mm² — covers the full range for a 63 A circuit on standard PVC copper. The closest functional peer from the same brand is the 5SQ2670-2YA63 — same poles, same current, same Type A residual — but the 5SQ series carries a different internal construction (short-time delayed vs instantaneous). Verify the selectivity requirement before swapping; the 5SM1656-6 is instantaneous, so it will trip ahead of a delayed upstream device. ## Approvals and compliance paperwork The 5SM1656-6 is silicon-free, which matters for potting or conformal-coating processes in high-vibration or corrosive environments. Mechanical endurance is rated at 10 000 switching cycles typical; the I²t let-through is 70 000 A²·s, and surge current withstand is 1 kA.","metaTitle":"Siemens 5SM1656-6 SENTRON RCCB, 4P, 63A, 300mA, Type A, 10kA","metaDescription":"Siemens 5SM1656-6 SENTRON RCCB, 4-pole, 63A rated at 40°C, 300mA Type A residual current, 10kA SCCR, DIN rail mount. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Solid":"1.5 ... 25 mm²","Stranded":"1.5 ... 25 mm²","at 40 Cel":"63 A","at 45 Cel":"63 A","at 50 Cel":"60.48 A","at 55 Cel":"57.96 A","at 60 Cel":"55.44 A","at 65 Cel":"52.92 A","at 70 Cel":"50.4 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +60 °C","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"55 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Operating frequency":"50Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Number of width units":"4","Type of fault current":"A","I2t-value / permissible":"70 000 A²·s","circuit-breaker / Design":"5SM1","Short-circuit current rating":"10 kA","Current / at AC / rated value":"63 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"500 V","Surge current resistance / rated value":"1 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"300 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"100 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=352208&mlfb=5SM1656-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM1656-6/alternatives.json"},"ai":{"faq":[{"question":"What conductor sizes does 5SM1656-6 accept?","answer":"Solid and stranded conductors from 1.5 mm² up to 25 mm². Terminal torque spec is 2.5 to 3 N·m."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM1656-6","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/5SM1656-6 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}}