{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU1356-7KV40","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU1356-7KV40","canonicalUrl":"https://aoctrl.com/siemens/5SU1356-7KV40","factsUrl":"https://aoctrl.com/api/mcp/products/5SU1356-7KV40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SU1356-7KV40 FI/LS-PROTECTOR TYPE A (PSE/SSF), D=70MM IFN 30MA, 6KA, 1+N-POLE C 40A.","salesMarkdown":"The Siemens 5SU1356-7KV40 is a combined RCD/MCB — an FI/LS protector — in a Type A (PSE/SSF) configuration. It packs a 40 A C-curve overcurrent trip and a 30 mA residual-current detection into a single 1+N-pole, 70 mm-wide module. Type A detects AC sinusoidal and pulsed DC residual currents up to 6 mA smooth DC superimposed. Rated current In = 40 A with C-curve characteristic: the magnetic release trips at 5–10× In (200–400 A), so it handles motor inrush and capacitive loads without nuisance tripping. The 40 A rating matches a 7.5 kW resistive load at 230 V or a 9 kVA inductive load — typical for a cooker circuit, a large shower, or a submain feeding a small workshop. The 1+N-pole form switches the phase and disconnects the neutral; the neutral pole is switched but not protected against overcurrent, which is standard for single-phase final circuits in TN-S and TT systems. Breaking capacity Icn = 6 kA per IEC 61009-1: this is the prospective short-circuit current the device can interrupt at its rated voltage.","metaTitle":"Siemens 5SU1356-7KV40 FI/LS Protector, Type A, 40A C, 30mA,","metaDescription":"Siemens 5SU1356-7KV40 FI/LS protector, Type A (PSE/SSF), 40A C-curve, 30mA, 6kA, 1+N-pole. 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":{"lifecycle_stage":"current"}},"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=202097&mlfb=5SU1356-7KV40","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU1356-7KV40/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between Type A and Type AC RCDs in this protector?","answer":"Type A detects both AC sinusoidal residual currents and pulsed DC residual currents up to 6 mA smooth DC superimposed, covering rectifier-fed loads like washing machines, LED drivers, and single-phase VFDs. A Type AC RCD only detects AC sinusoidal currents and would miss pulsed DC faults from such loads."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU1356-7KV40","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/5SU1356-7KV40 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}}