{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY5420-7CC","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY5420-7CC","canonicalUrl":"https://aoctrl.com/siemens/5SY5420-7CC","factsUrl":"https://aoctrl.com/api/mcp/products/5SY5420-7CC","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY5420-7CC, 4-pole DC miniature circuit breaker, C-curve, 20 A (35 °C), 880 V DC, 10 kA IEC 60947-2, IP20, 4 MW.","salesMarkdown":"## DC-rated 4-pole MCB for industrial DC bus protection Its C-curve tripping characteristic (5–10× In) handles moderate inrush from DC motor drives, contactor coils, and control transformers without nuisance trips. Rated 20 A at 35 °C ambient, it derates to 17.4 A at 55 °C — the 55 °C figure is the one to size against if the breaker sits in a warm cabinet next to drives or power supplies. Breaking capacity is 10 kA at 880 V DC per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235 — so it clears a hard DC bus fault up to that level without cascading upstream. The 4-pole design (4P) switches both poles of a two-wire DC circuit plus two auxiliary poles, or handles a split DC bus. Polarity must be observed on the supply cord connection. Snap-on quick assembly system; mounting position any orientation. Touch protection is built in. Sealable — panel builders can lock the setting with a lead seal after commissioning. Halogen-free and silicon-free construction for sensitive environments like food processing or semiconductor fabs.","metaTitle":"Siemens 5SY5420-7CC SENTRON MCB, 4P C-curve 20 A DC, 880 V","metaDescription":"Siemens 5SY5420-7CC SENTRON miniature circuit breaker, 4-pole, C characteristic, 20 A at 35 °C, 880 V DC, 10 kA breaking capacity. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["4-Pole MCB (DIN Rail)"],"specifications":{"Depth":"76 mm","Width":"72 mm","title":"5SY5420-7CC","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Miniature circuit-breaker 880 V DC 10kA, 4-pole, C, 20A","Halogen-Free":"Yes","Silicon-Free":"Yes","Number Of Poles":"4","Type Of Voltage":"DC","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Product Designation":"Miniature circuit breaker","acc. to IEC 81346-2":"F","at DC / rated value":"880 V","protection class IP":"IP20, with connected conductors","Overvoltage Category":"II","Combined Terminal Top":"Yes","Design Of The Product":"Machine manufacture / industry","Number Of Poles / Note":"4P","acc. to DIN EN 61346-2":"F","at 35 °C / rated value":"20 A","at 40 °C / rated value":"19 A","at 45 °C / rated value":"18.48 A","at 50 °C / rated value":"17.96 A","at 55 °C / rated value":"17.4 A","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Number Of Modular Width Units":"4","Tripping Characteristic Class":"C","Position / Of Power Supply Cord":"Consider polarity","Product Feature / Touch Protection":"Yes","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","at DC / acc. to IEC 60947-2 / rated value":"10 kA","at AC / acc. to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance / acc. to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Product Function / Neutral Conductor Switching":"No","operating voltage / at DC / rated value / maximum":"1 000 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fe95e824bcdf2dfd2754eb900e77cabb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=142468&mlfb=5SY5420-7CC"},"ai":{"faq":[{"question":"What is the closest functional alternative to 5SY5420-7CC?","answer":"The 5SY5416-7 is a 4-pole DC MCB in the same SENTRON family but with a lower current rating (16 A vs 20 A). It shares the same 880 V DC rating, C-curve, and 4 MW footprint, so it drops into the same DIN-rail slot without rewiring — just a different ampacity for the load."},{"question":"What compliance documentation does Siemens provide for 5SY5420-7CC?","answer":"The breaker carries IEC 60947-2 (10 kA DC), UL 1077, and CSA C22.2 No. 235 (5 kA AC) approvals. It is classified per IEC 81346-2 and DIN EN 61346-2 as function F. RoHS, REACH, and CE declarations are standard for the SENTRON series — request them with the order."},{"question":"Where can I buy 5SY5420-7CC and how is it quoted?","answer":"We source this part through independent industrial distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or single-piece needs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY5420-7CC","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/5SY5420-7CC 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}}