{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SJ4220-7HG42","brand":"Siemens","brandSlug":"siemens","productSlug":"5SJ4220-7HG42","canonicalUrl":"https://aoctrl.com/siemens/5SJ4220-7HG42","factsUrl":"https://aoctrl.com/api/mcp/products/5SJ4220-7HG42","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SJ4220-7HG42 miniature circuit breaker, 2-pole, C tripping characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC / 60 V DC, 2 MW units, IP20/IP40, halogen-free.","salesMarkdown":"## Breaking capacity and trip curve — what fits your fault duty The 5SJ4220-7HG42: Rated 10 kA per EN 60898 and 15 kA per IEC 60947-2 — the higher figure applies when the breaker is used as an industrial circuit breaker under the product standard, not just a domestic MCB. For a panel feeding a machine with a transformer upstream that can deliver 12 kA fault current, the 15 kA rating under IEC 60947-2 gives the headroom; the 10 kA rating is the limit if the installation is declared per EN 60898 only. C-curve characteristic means the magnetic trip operates at 5 to 10 times In — typical for motor and lighting loads with moderate inrush. The 2-pole design (2P) switches both phases simultaneously; neutral conductor switching is not included, so the neutral must be handled separately or via a 4-pole device if isolation is required. ## Panel fit — DIN rail, width, and mounting Occupies 2 modular width units (36 mm wide) on standard 35 mm DIN rail (EN 60715). Depth is 70 mm, height 121 mm — the 70 mm installation depth is the dimension behind the panel cutout, so factor that into enclosure depth when the door is closed. ## Environmental and compliance — shop-floor and documentation Rated IP20 with connected conductors, IP40 in the handle range — sufficient for enclosed panels but not for washdown zones. Ambient temperature range -40 °C to +75 °C, with max 95 % humidity; vibration resistance 50 m/s² at 25 to 150 Hz and 60 m/s² at 35 Hz (4 seconds). Halogen-free and silicon-free construction — important for clean-room or semiconductor fab environments where outgassing from the plastic housing would contaminate optics or process gases. Sealable design allows the installer to lock the toggle in the off position with a padlock. Overvoltage category 3, pollution degree 3 — suitable for fixed installations in industrial environments where transient overvoltages from switching and lightning are expected. ## Sourcing and lifecycle — current production, quoted to order For a BOM freeze or a panel that was originally specified around the 5SY7206-7CC family: the 5SJ4220-7HG42 shares the same 2-pole, C-curve, 10 kA class and the same 2 MW DIN footprint, so it drops into the same panel slot without rewiring. The 5SY series is a different generation with slightly different breaking capacities — confirm the fault level matches your SCCR study before substituting.","metaTitle":"Siemens 5SJ4220-7HG42 SENTRON MCB, 2P, C-Curve, 10kA/15kA","metaDescription":"Siemens SENTRON 5SJ4220-7HG42 miniature circuit breaker, 2-pole, C characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["2-Pole MCB (DIN Rail)"],"specifications":{"Depth":"70 mm","Width":"36 mm","title":"5SJ4220-7HG42","Height":"121 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"Yes","description":"Circuit breaker 10kA, 2-pole, C, 20A according to UL 489-480Y/277V","Halogen-Free":"Yes","Silicon-Free":"Yes","Design Of Pole":"2P","Number Of Poles":"2","lifecycle_stage":"current","Fastening Method":"on standard mounting rail","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 breakers","protection class IP":"IP20, with connected conductors, IP 40 in the handle range","Overvoltage Category":"3","Tunnel Terminals Top":"No","Vibration Resistance":"50 m/s² at 25 to 150Hz and 60m/s² at 35Hz (4sec)","Combined Terminal Top":"Yes","Design Of The Product":"Miniature circuit-breaker 5SJ4","Product Function Note":"Terminal tightening torque for Cu, 60/75°C; 3.5Nm/31lb.in","Tunnel Terminals Bottom":"No","Combined Terminal Bottom":"Yes","Suitability For Operation":"Mechanical engineering / industry","at DC rated value maximum":"60 V","Neutral Conductor Switching":"No","Number Of Modular Width Units":"2","Position Of Power Supply Cord":"Any","Tripping Characteristic Class":"C","according to EN 60898 rated value":"10 kA","Ambient Temperature During Operation":"max. 95% humidity","Supply Voltage Frequency Rated Value":"50 Hz","according to IEC 60947-2 rated value":"15 kA","installation environment regarding EMC":"Suitable for environment B (immunity to interference not applicable)","insulation voltage (Ui) at AC rated value":"440 V","Value Range Of The Supply Voltage Frequency":"50/60 Hz","vibration resistance according to IEC 60068-2-6":"±1 mm at 5 to 25 Hz; 50 m/s² at 25 to 150 Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","Tightening Torque With Screw-Type Terminals Maximum":"3.5 N·m","power loss [W] for rated value of the current at AC in hot operating state per pole":"2.4 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$246.21","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b6c3beb3fe98959ce852dfd3913707df.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=112176&mlfb=5SJ4220-7HG42"},"ai":{"faq":[{"question":"What is the breaking capacity of 5SJ4220-7HG42?","answer":"10 kA per EN 60898 and 15 kA per IEC 60947-2. The 15 kA rating applies when the breaker is used as an industrial circuit breaker under the product standard IEC 60947-2; the 10 kA rating is the limit under the domestic MCB standard EN 60898."},{"question":"Will 5SJ4220-7HG42 drop into a panel that was specified around 5SY7206-7CC without rewiring?","answer":"Yes, for the mechanical fit. Both are 2-pole, C-curve, 2 MW width (36 mm) on standard DIN rail. The 5SJ4220-7HG42 has a 15 kA rating per IEC 60947-2 versus the 5SY7206-7CC's typical 10 kA — confirm your fault level before substituting, but the footprint and wiring are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SJ4220-7HG42","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/5SJ4220-7HG42 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}}