{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1374-7AK81","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1374-7AK81","canonicalUrl":"https://aoctrl.com/siemens/5SU1374-7AK81","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1374-7AK81","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 4-pole, 100 A, 30 mA, Type B, tripping characteristic C, 10 kA breaking capacity, super resistant K design.","salesMarkdown":"That means it handles universal current-sensitive loads — variable-speed drives, UPS systems, EV chargers — where mixed-frequency fault currents would blind a standard Type A device. The 100 A rating is at 30 °C; at 40 °C it derates to 92.5 A, at 45 °C to 89 A, at 50 °C to 85 A, at 55 °C to 81 A, and at 60 °C to 77 A. Type B residual current detection covers AC, pulsating DC, smooth DC, and high-frequency fault currents up to 1 kHz. That's the key spec for drives, medical equipment, or any installation with rectifiers downstream — a Type A won't catch smooth DC leakage. For purely resistive or long cable runs, a B-curve would trip faster; for heavy transformer inrush, a D-curve might hold better. This one splits the difference. If your prospective fault current exceeds 10 kA, you'll need a current-limiting upstream breaker or a higher-rated device. This RCBO snaps onto a DIN rail (11 modular width units, 198 mm wide) and mounts in any position. IP20 with the distribution board installed and conductors connected — it's a panel-interior device, not a weatherproof outdoor unit. Feed from top or bottom; the supply cord position is unrestricted. The super resistant K design indicates enhanced resistance to surge currents and environmental stress — useful in industrial panels with frequent switching transients or higher ambient temperatures.","metaTitle":"Siemens SENTRON 5SU1374-7AK81 RCBO, 4P, 100 A, 30 mA, Type B","metaDescription":"Siemens SENTRON 5SU1374-7AK81 RCBO, 4-pole, 100 A rated, 30 mA residual current, Type B, C-curve, 10 kA breaking capacity. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"198 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"100 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50/60 Hz","Product Designation":"RCBO","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Super resistant K","Residual Current Type":"B","Weight With Packaging":"2 038 g","at 30 °C rated value":"100 A","at 40 °C rated value":"92.5 A","at 45 °C rated value":"89 A","at 50 °C rated value":"85 A","at 55 °C rated value":"81 A","at 60 °C rated value":"77 A","Energy Limitation Class":"3","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"11","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"C","Number Of Poles With Protection":"4","according to EN 60898 rated value":"10 kA","Tripping Fault Current Rated Value":"30 mA","insulation voltage (Ui) rated value":"440 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"10 kA","Surge Current Resistance At (8/20) μS":"3 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"14 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/5827ce1ba1ec8e91bf93a3c01cd300de.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=54628&mlfb=5SU1374-7AK81","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1374-7AK81/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 5SU1374-7AK81?","answer":"The peer 5SU9354-7KK20 is also a 4-pole SENTRON RCBO but with a different residual current type or rating — verify the specific Type and sensitivity before substituting. The 5SU1374-7AK81 is Type B, 30 mA; the peer may differ."},{"question":"What are the key ratings of 5SU1374-7AK81?","answer":"Rated current 100 A at AC, residual current 30 mA, Type B, C-curve, 10 kA breaking capacity per EN 60898 and IEC 60947-2, 4-pole, 440 V insulation voltage."},{"question":"Where can I buy 5SU1374-7AK81?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 5SU1374-7AK81?","answer":"The part is halogen-free and silicon-free. It carries an IP20 protection class and is rated for overvoltage category III, pollution degree 2. Standard Siemens declarations (CE, UKCA) apply per the SENTRON series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1374-7AK81","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/5SU1374-7AK81 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}}