{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SL4420-0RC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SL4420-0RC","canonicalUrl":"https://aoctrl.com/siemens/5SL4420-0RC","factsUrl":"https://aoctrl.com/api/mcp/products/5SL4420-0RC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 5SL4420-0RC, miniature circuit breaker, 20 A, 4-pole, Z characteristic, 10 kA breaking capacity.","salesMarkdown":"The Z trip curve is designed for semiconductor protection and sensitive electronic loads where the inrush is minimal but short-circuit protection must act fast — think rectifier inputs, DC power supplies, or control transformer primaries. The 10 kA interrupting rating at the rated voltage is the standard for downstream distribution in a commercial or light industrial panel; it coordinates with an upstream 25 kA or 36 kA main breaker without requiring a current-limiting device at every branch. ## What the Z characteristic means for fit The Z characteristic is the least common of the standard trip curves (B, C, D, Z). It trips magnetically between 2 and 3 times rated current (In), versus 3–5 In for B-curve or 5–10 In for C-curve. That means the 5SL4420-0RC will clear a short-circuit fault faster than a B or C breaker on the same 20 A frame, but it also means it must not be applied on circuits with motor-starting inrush or transformer magnetizing current — those loads would nuisance-trip it. The intended load is purely resistive or semiconductor-grade: PLC power supplies, DC bus capacitors, control transformers below 100 VA, or field-device loops where the wire run is short and the fault current is the only concern. Four-pole width occupies 72 mm (4 x 18 mm modular units). The busbar system is the same Siemens 5ST3 series used across the 5SL4 family — pin positions align for a 4-pole feed-through or a 4-pole + N configuration.","metaTitle":"Siemens 5SL4420-0RC Miniature Circuit Breaker, 20A 4-pole Z","metaDescription":"Siemens 5SL4420-0RC miniature circuit breaker, 20A, 4-pole, Z characteristic, 10kA breaking capacity. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"title":"5SL4420-0RC","description":"Miniature Circuit Breaker 20A 4-pole Z characteristic 10kA","lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/19f7954568f4871c49fd8b52956e6629.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1502392&mlfb=5SL4420-0RC"},"ai":{"faq":[{"question":"Where can I buy the 5SL4420-0RC and get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the 5SL4420-0RC's breaking capacity?","answer":"It is rated for 10 kA breaking capacity, which is the standard interrupting rating for downstream branch-circuit protection in commercial and light industrial panels."},{"question":"What compliance documentation is available for the 5SL4420-0RC?","answer":"As a Siemens miniature circuit breaker, the 5SL4420-0RC carries CE marking for the European market and is designed to meet IEC/EN 60898-1. RoHS and REACH declarations are available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SL4420-0RC","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/5SL4420-0RC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}