{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1374-7DK82","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1374-7DK82","canonicalUrl":"https://aoctrl.com/siemens/5SU1374-7DK82","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1374-7DK82","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU1 series RCBO, 4-pole, 125 A (at 30 °C), Type B+ fault current, C tripping characteristic, 10 kA breaking capacity per EN 60898 and IEC 60947-2.","salesMarkdown":"The Siemens 5SU1374-7DK82 is a 4-pole RCBO from the SENTRON 5SU1 series, combining overcurrent protection and residual current detection in a single 11-module-wide unit. It is rated 125 A at 30 °C ambient, with a C tripping curve for moderate inrush loads like motor starters or transformer banks, and a Type B+ fault current characteristic that detects smooth DC residual currents up to 2 kHz — critical for variable-speed drives and UPS-fed circuits where standard AC/DC-sensitive RCDs may blind. Overvoltage category III means it is rated for fixed-installation distribution boards, not just downstream equipment. ## Current derating and ambient limits At 40 °C it derates to 115.62 A, at 45 °C to 111.25 A, at 50 °C to 106.25 A, at 55 °C to 101.25 A, and at 60 °C to 96.25 A. ## Conductor sizing and termination For a 125 A circuit, 35 mm² or 50 mm² copper is typical depending on installation method and ambient; the terminal range covers both without need for pin lugs.","metaTitle":"Siemens 5SU1374-7DK82 SENTRON RCBO, 125 A, 4-pole, Type B+","metaDescription":"Siemens 5SU1374-7DK82 SENTRON RCBO, 125 A rated at 30 °C, 4-pole, Type B+ fault current, 10 kA breaking capacity, C-curve. Active lifecycle, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"6 ... 50 mm²","Width":"198 mm","Height":"90 mm","Stranded":"6 ... 50 mm²","at 30 Cel":"125 A","at 40 Cel":"115.62 A","at 45 Cel":"111.25 A","at 50 Cel":"106.25 A","at 55 Cel":"101.25 A","at 60 Cel":"96.25 A","Halogen-Free":"Yes","Silicon-Free":"Yes","During Storage":"-40 ... +75 °C","Number of poles":"4","Type of voltage":"AC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +55 °C","Product designation":"RCBO","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Energy limiting class":"3","Number of width units":"11","Type of fault current":"B+","Number of poles / Note":"4P","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SU1","Current / at AC / rated value":"125 A","Tripping characteristic class":"C","acc. to EN 60898 / rated value":"10 kA","For Testing Equipment / Minimum":"195 V","Position / of power supply cord":"Either top or bottom","Number of poles / with protection":"4","acc. to IEC 60947-2 / rated value":"10 kA","Product feature / Touch protection":"Yes","Supply voltage frequency / rated value":"50 Hz","Tripping residual current / rated value":"30 mA","Influence of the surrounding temperature":"Max. 95% humidity","Surge current resistance / at (8/20) μs":"3 kA","Tightening torque / with screw-type terminals":"3 ... 3.5 N·m","Product function / neutral conductor switching":"Yes","Mechanical service life (switching cycles) / typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2c9fb7e00045e857b116e3e4f49c25eb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=218992&mlfb=5SU1374-7DK82","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1374-7DK82/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SU1374-7DK82?","answer":"10 kA per both EN 60898 and IEC 60947-2, which covers the majority of commercial and light industrial distribution boards."},{"question":"What conductor sizes does 5SU1374-7DK82 accept?","answer":"Solid or stranded conductors from 6 mm² up to 50 mm², which covers the full range for a 125 A circuit."},{"question":"What is the depth of 5SU1374-7DK82?","answer":"77 mm overall depth, with a 70 mm installation depth behind the panel face — fits standard 125 A rated enclosures."},{"question":"Where can I buy 5SU1374-7DK82?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1374-7DK82","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/5SU1374-7DK82 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}}