{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SU9346-7CR50","brand":"Siemens","brandSlug":"siemens","productSlug":"5SU9346-7CR50","canonicalUrl":"https://aoctrl.com/siemens/5SU9346-7CR50","factsUrl":"https://aoctrl.com/api/mcp/products/5SU9346-7CR50","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCBO, 4-pole, Type A, 30 mA, C-characteristic, 50 A rated, 6 kA (EN 60898) / 10 kA (IEC 60947-2), 400 V AC, IP20, halogen-free, silicon-free.","salesMarkdown":"The Siemens 5SU9346-7CR50 is a 4-pole RCD-operated circuit breaker (RCBO) from the SENTRON family — it combines overcurrent protection and residual current detection in one 2-module-width unit. The C-curve (tripping characteristic class C) means it holds through inrush up to 5–10× rated current before opening, so it's sized for motor and light transformer loads where the start-up surge would nuisance-trip a B-curve breaker. Rated 50 A at 30 °C on a 400 V AC supply, it handles the typical three-phase distribution board feed. The residual current element is Type A, 30 mA — that covers sinusoidal AC fault currents plus pulsating DC faults from rectified loads (switch-mode supplies, VFDs, LED drivers). With 4 poles protected, this unit guards all live conductors in a three-phase plus neutral circuit. The EN 60898 figure governs domestic and light commercial boards; the IEC 60947-2 figure applies when the RCBO is specified into an industrial distribution panel where the prospective fault current is higher. Energy limitation class 3 means the let-through energy (I²t) is low enough that downstream wiring and connected equipment see less thermal stress during a fault. For a panel-builder coordinating a distribution board, that's the difference between a clean trip and a cascading failure that takes out upstream breakers. Snap-on mounting to DIN rail, any position. The 2-module-width body takes up 36 mm on the rail — that's two standard 18 mm slots. Supply can enter from top or bottom, which simplifies busbar routing in a crowded enclosure. Surge current resistance at 8/20 μS is 1 kA — that's the impulse withstand for lightning-induced surges on the supply side. Surge voltage resistance rated at 4 000 V covers the dielectric withstand between live and accessible metal parts.","metaTitle":"Siemens 5SU9346-7CR50 SENTRON RCBO, 4P, 50 A, C-Curve, 30 mA","metaDescription":"Siemens 5SU9346-7CR50 SENTRON RCBO, 4-pole, 50 A rated, C-curve, 30 mA Type A residual current, 6 kA (EN 60898) / 10 kA (IEC 60947-2). Current production. Sourced to order against","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"126 mm","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"4P","Number Of Poles":"4","lifecycle_stage":"current","Mounting Position":"any","at AC rated value":"400 V","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Degree Of Pollution":"2","Operating Frequency":"50/60 Hz","Product Designation":"RCD-operated circuit breaker","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Weight With Packaging":"900 g","at 30 °C rated value":"50 A","Energy Limitation Class":"3","For Testing Equipment Minimum":"125 V","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Either top or bottom","Tripping Characteristic Class":"C","Number Of Poles With Protection":"4","according to EN 60898 rated value":"6 kA","insulation voltage (Ui) rated value":"440 V","Supply Voltage Frequency Rated Value":"50 Hz","Surge Voltage Resistance Rated Value":"4 000 V","according to IEC 60947-2 rated value":"10 kA","Surge Current Resistance At (8/20) μS":"1 kA","Influence Of The Surrounding Temperature":"Max. 95% humidity","Type Of Voltage Of The Operating Voltage":"AC","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"0.75 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d1f63963ade5e02163a6029ac935b8dd.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1440207&mlfb=5SU9346-7CR50","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SU9346-7CR50/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 5SU9346-7CR50?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 5SU9346-7CR50?","answer":"Rated breaking capacity is 6 kA per EN 60898 and 10 kA per IEC 60947-2 at 400 V AC."},{"question":"What does the C-curve on 5SU9346-7CR50 mean?","answer":"The C-curve (tripping characteristic class C) means the breaker holds through inrush currents of 5–10× rated current before tripping, making it suitable for motor and transformer loads that draw a start-up surge."},{"question":"What is the residual current rating of 5SU9346-7CR50?","answer":"Type A, 30 mA residual current detection — covers sinusoidal AC faults plus pulsating DC faults from rectified loads, at the standard personal-protection threshold."},{"question":"Will 5SU9346-7CR50 drop into a panel specified around 5SU9354-7KK16?","answer":"Both are 4-pole SENTRON RCBOs in 2-module-width format, but the 5SU9354-7KK16 is a different rating and characteristic — verify the specific current, curve, and residual type against your BOM before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SU9346-7CR50","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/5SU9346-7CR50 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}}