{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ6550-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ6550-6","canonicalUrl":"https://aoctrl.com/siemens/5SJ6550-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ6550-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ6 miniature circuit breaker, 1P+N, B tripping characteristic, 50 A rated current, 6 kA breaking capacity, 240 V AC, 70 mm depth.","salesMarkdown":"## What this 50 A B-curve MCB is for This is the part you spec for a 50 A lighting or distribution subfeed that needs overcurrent and short-circuit protection in a single module width. Rated 50 A at 240 V AC, so it handles a 50 A continuous load on a single-phase line. The 1P+N pole switches the phase and switches the neutral — the neutral pole is not protected, just switched, which is standard for single-phase final circuits in many European and Asian panel designs. The B characteristic trips magnetically between 3 and 5 times In (150–250 A), so it avoids nuisance tripping on cable charging currents but clears a hard short fast. For motor or transformer loads with higher inrush, a C or D curve would be the better call — this one is for resistive and general-purpose circuits. Rated for 60 V DC maximum, so it can also serve low-voltage DC branch circuits — think control power supplies or battery-backed loads — but only up to that voltage. Insulation voltage is 440 V AC, giving headroom for the 240 V phase-to-neutral application. Snaps onto standard DIN rail, occupies 2 width units (about 36 mm). That covers unheated utility rooms, outdoor enclosures in temperate climates, and hot machine cabinets. Vibration resistance is 50 m/s² at 25 to 150 Hz and 60 m/s² at 10 to 150 Hz per IEC 60068-2-6 — tough enough for industrial panel mounting near rotating equipment.","metaTitle":"Siemens 5SJ6550-6 SENTRON MCB, 1P+N, B Curve, 50 A, 6 kA","metaDescription":"Siemens 5SJ6550-6 SENTRON miniature circuit breaker, 1P+N, B characteristic, 50 A, 6 kA breaking capacity per EN 60898. Current lifecycle stage. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["1-Pole MCB (DIN Rail)"],"specifications":{"Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","Rated Value":"50 Hz","Halogen-Free":"Yes","Silicon-Free":"Yes","Number of poles":"2","Type of voltage":"AC/DC","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product designation":"Miniature circuit breakers","Protection class IP":"IP20, with connected conductors","Overvoltage category":"3","Design of the product":"Miniature circuit breaker 5SJ6","Energy limiting class":"3","Number of width units":"2","Number of poles / Note":"1P+N","circuit-breaker / Design":"5SJ6","Current / at AC / rated value":"50 A","Tripping characteristic class":"B","at DC / rated value / maximum":"60 V","acc. to EN 60898 / rated value":"6 kA","Position / of power supply cord":"Any","acc. to IEC 60947-2 / rated value":"6 kA","Product feature / Touch protection":"Yes","Supply voltage / at AC / rated value":"240 V","Influence of the surrounding temperature":"Periodically +55°C, max. 95% humidity","Insulation voltage / at AC / rated value":"440 V","Vibration resistance / acc. to IEC 60068-2-6":"50m/s² at 25 to 150Hz and 60m/s² at 10 to 150 Hz","with multi-phase operation / at AC / maximum":"440 V","Mechanical service life (switching cycles) / typical":"20 000"}},"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=440293&mlfb=5SJ6550-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SJ6550-6/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SJ6550-6 used for?","answer":"It's a 1P+N miniature circuit breaker with a B tripping characteristic, rated 50 A at 240 V AC with a 6 kA breaking capacity. It protects single-phase final circuits — lighting, general-purpose outlets, resistive loads — in distribution boards where the prospective fault current is 6 kA or less."},{"question":"Where can I buy the 5SJ6550-6?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ6550-6","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/5SJ6550-6 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}}