{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SY7420-7","brand":"Siemens","brandSlug":"siemens","productSlug":"5SY7420-7","canonicalUrl":"https://aoctrl.com/siemens/5SY7420-7","factsUrl":"https://aoctrl.com/api/mcp/products/5SY7420-7","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SY7420-7, 4-pole miniature circuit breaker, C characteristic, 15 kA (EN 60898) / 25 kA (IEC 60947-2) breaking capacity, 400 V AC, 4 MW, IP20.","salesMarkdown":"## Siemens 5SY7420-7 — 4-pole C-curve MCB for panel builds It carries a 15 kA breaking capacity per EN 60898-1 and 25 kA per IEC 60947-2, so it handles high-fault-current panel feeds without cascading upstream — the 25 kA figure is the one that governs industrial distribution board coordination. At DC the part is rated 15 kA at 60 V (max 72 V), which covers control-circuit protection in battery-backed or rectifier-fed sections. The C-curve (5–10× In) suits motor-starting and transformer inrush loads common in mechanical engineering and industrial environments. The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No. 235 (5 kA under UL/CSA). The manufacturer provides RoHS and REACH declarations as part of the standard documentation package; a UL/CSA mark is present on the nameplate.","metaTitle":"Siemens 5SY7420-7 SENTRON MCB, 4P C-Curve, 15/25 kA","metaDescription":"Siemens 5SY7420-7 SENTRON 4-pole MCB, C characteristic, 15 kA (EN 60898) / 25 kA (IEC 60947-2) breaking capacity. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Miniature Circuit Breakers (MCB)"],"specifications":{"Depth":"76 mm","Width":"72 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Standard":"IEC / EN 60898-1, IEC / EN 60947-2 / UL1077","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"Quick assembly system","Mounting Position":"any","at AC rated value":"400 V","at DC rated value":"60 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"Miniature circuit breaker","protection class IP":"IP20, with connected conductors","Overvoltage Category":"III","Combined Terminal Top":"Yes","Energy Limitation Class":"3","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","Neutral Conductor Switching":"No","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"15 kA","according to IEC 60947-2 rated value":"25 kA","Influence Of The Surrounding Temperature":"max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C","Type Of Voltage Of The Operating Voltage":"AC","at DC according to IEC 60947-2 rated value":"15 kA","Value Range Of The Supply Voltage Frequency":"50/60 Hz","operating voltage at DC rated value maximum":"72 V","with multi-phase operation at AC rated value":"440 V","with single-phase operation at AC rated value":"440 V","at AC according to UL 1077 and CSA C22.2 No.235":"5 kA","vibration resistance according to IEC 60068-2-6":"±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","supply voltage with single-phase operation at AC rated value":"230 V","power loss [W] for rated value of the current at AC in hot operating state per pole":"1.7 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8a2feb69deec02ec7c5248b3f6bb5855.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=507097&mlfb=5SY7420-7","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SY7420-7/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 5SY7420-7?","answer":"The 5SY4304-7CV is a 4-pole C-curve MCB from the same SENTRON family. It shares the same pole count and characteristic, but its breaking capacity and voltage ratings differ — verify coordination before substituting. The 5SY7420-7 is the higher-rated variant for industrial feeds."},{"question":"What compliance documentation does Siemens provide for 5SY7420-7?","answer":"Standard documentation includes RoHS and REACH declarations, plus the UL/CSA mark on the nameplate. The breaker is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077/CSA C22.2 No. 235."},{"question":"Where can I buy 5SY7420-7 and how is it quoted?","answer":"The 5SY7420-7 is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no minimum volume required for a sourcing inquiry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SY7420-7","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/5SY7420-7 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}}