{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM9622-0KK","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM9622-0KK","canonicalUrl":"https://aoctrl.com/siemens/5SM9622-0KK","factsUrl":"https://aoctrl.com/api/mcp/products/5SM9622-0KK","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON, RC unit electronic, 5SM9622-0KK, 2-pole, type AC, 40 A, 300 mA, Un AC 400 V, 50 Hz.","salesMarkdown":"## What this 2-pole RC unit brings to the panel The SENTRON 5SM9622-0KK is a 2-pole residual current unit (type AC) rated 40 A at 400 V AC, 50 Hz, with a 300 mA trip threshold. That 300 mA sensitivity is sized for equipment protection or fire-prevention circuits rather than personnel shock protection (which typically calls for 30 mA or lower). If your load includes rectifiers, VFDs, or switched-mode supplies, you need a type A or type F unit instead. The 40 A rating holds at 40 °C ambient (37.2 A derated), then steps down through a published curve: 36 A at 50 °C, 34 A at 60 °C, and 32 A at 70 °C. That thermal derating is the spec to watch if the unit sits in a crowded enclosure or near heat-generating busbars — the headline 40 A only applies up to 40 °C. Lifecycle stage is marked current — this is an active, in-production catalog line from Siemens SENTRON. No phase-out notice or last-time-buy date on record. ## Integration notes Two-pole form factor snaps onto DIN rail in the standard SENTRON modular footprint. The RC unit is instantaneous-trip design — no intentional time delay, so it trips within one cycle on a fault. That makes it fast but means it coordinates poorly with downstream selective MCBs unless the fault current is well above the MCB's instantaneous threshold. Pair it with a time-delayed SENTRON RC unit upstream if selectivity is required.","metaTitle":"SENTRON 5SM9622-0KK RC Unit, 2-Pole, 40 A, 300 mA, Type AC","metaDescription":"SENTRON 5SM9622-0KK RC unit electronic, 2-pole, type AC, 40 A rated, 300 mA trip, 400 V. 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":{"Number Of Poles":"2","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"RC unit electronic","at AC / rated value":"40 A","Design Of The Product":"Instantaneous","Residual Current Type":"AC","at 40 °C / rated value":"37.2 A","at 45 °C / rated value":"37.2 A","at 50 °C / rated value":"36 A","at 55 °C / rated value":"34.8 A","at 60 °C / rated value":"34 A","at 65 °C / rated value":"33.2 A","at 70 °C / rated value":"32 A","Tripping Fault Current / Rated Value":"300 mA","Supply Voltage Frequency / Rated Value":"50 Hz"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b1c7e1a7a4c02fd4bf04f5f5f913e7f8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629205&mlfb=5SM9622-0KK","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM9622-0KK/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM9622-0KK","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/5SM9622-0KK 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}}