{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9156-7KK20","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9156-7KK20","canonicalUrl":"https://aoctrl.com/siemens/5SU9156-7KK20","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9156-7KK20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SU9156-7KK20 RCBO, RCD-operated circuit breaker, 1P+N, 20 A, 10 mA, Type A, 6 kA, 2 MW, IP20.","salesMarkdown":"The Siemens 5SU9156-7KK20 is a SENTRON RCD-operated circuit breaker (RCBO) — a combined overcurrent and residual-current device in a single 2-module-wide unit (36 mm). It protects a 1P+N circuit at 20 A rated current with a 10 mA residual-current trip threshold, Type A (pulsating DC and AC fault currents). The 20 A rating at 30 °C derates to 18.8 A at 40 °C and 16.2 A at 55 °C — factor the ambient temperature inside the enclosure when sizing for continuous load. The 10 mA residual-current sensitivity is lower than the standard 30 mA, so it catches smaller leakage currents; that makes it suitable for circuits where a higher threshold could mask a developing fault, but it also means the device may trip on normal capacitive leakage from long cable runs or surge suppressors. Rated insulation voltage is 264 V, overvoltage category III, pollution degree 2 — standard for fixed-installation distribution boards. IP20 with connected conductors, so it lives inside a closed panel.","metaTitle":"Siemens 5SU9156-7KK20 SENTRON RCBO, 20A, 10mA, Type A, 6kA","metaDescription":"Siemens 5SU9156-7KK20 SENTRON RCBO, 20A rated, 10mA trip, Type A, 6kA breaking capacity, 2-module width. Active production. 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":"36 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"1P+N","Number Of Poles":"2","lifecycle_stage":"current","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50/60 Hz","Product Designation":"RCD-operated circuit breaker","at AC / rated value":"20 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","Energy Limitation Class":"3","Weight / With Packaging":"280 g","according to EN 61346-2":"F","at 30 °C / rated value":"20 A","at 40 °C / rated value":"18.8 A","at 45 °C / rated value":"18.2 A","at 50 °C / rated value":"17.4 A","at 55 °C / rated value":"16.2 A","according to IEC 81346-2":"F","Number Of Modular Width Units":"2","Tripping Characteristic Class":"C","For Testing Equipment / Minimum":"125 V","Position / Of Power Supply Cord":"Either top or bottom","Number Of Poles / With Protection":"1","according to EN 60898 / rated value":"6 kA","Tripping Fault Current / Rated Value":"10 mA","insulation voltage (Ui) / rated value":"264 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","Influence Of The Surrounding Temperature":"Max. 95% humidity","Surge Current Resistance / At (8/20) μS":"1 kA","Type Of Voltage / Of The Operating Voltage":"AC","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1fec01aac1f703f26ba9cc4cd46458c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629234&mlfb=5SU9156-7KK20","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9156-7KK20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU9156-7KK20?","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."},{"question":"What is the difference between 5SU9156-7KK20 and 5SL4120-7CC?","answer":"The 5SL4120-7CC is a standard MCB (overcurrent only) with no residual-current protection. The 5SU9156-7KK20 is an RCBO that combines overcurrent and 10 mA Type A RCD protection in the same 2-module footprint. They are not drop-in substitutes; the RCBO requires neutral connection and has different wiring and coordination requirements."},{"question":"What compliance documentation does this brand provide for 5SU9156-7KK20?","answer":"The part carries EN 60898 certification for breaking capacity (6 kA) and is designed to IEC 61346-2 / IEC 81346-2 functional designation F. It is halogen-free and silicon-free. Specific RoHS/REACH/UL declarations should be requested at quote time from the supplier."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9156-7KK20","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/5SU9156-7KK20 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}}