{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3342-6KL","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3342-6KL","canonicalUrl":"https://aoctrl.com/siemens/5SM3342-6KL","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3342-6KL","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 4-pole Type A, 25 A rated current, 30 mA trip sensitivity, 400 V AC, DIN rail mount, N-left design.","salesMarkdown":"The Siemens 5SM3342-6KL is a SENTRON 5SM3-series residual current circuit breaker (RCCB), 4-pole, Type A, rated 25 A at 400 V AC with a 30 mA trip threshold. It's an instantaneous (short-time-delay-free) device, meaning it trips on the residual current waveform without intentional delay — the go-to for general-purpose shock protection in TN and TT systems. Type A detection covers AC residual currents plus pulsating DC — the common waveform from single-phase rectifiers, variable-speed drives, and switching power supplies. If your downstream loads include electronics or motor drives, Type A is the correct choice over the simpler AC-only type. The 1 kA surge current resistance (I_{m}) covers the inrush from capacitive loads or nearby lightning-induced surges without nuisance tripping. Mounts on DIN rail (REG profile) in any orientation — no top/bottom restriction on the supply side. Occupies 4 width units (72 mm wide) at a depth of 77 mm and height of 90 mm, with an installation depth of 70 mm behind the panel door. The N-left design means the neutral pole is on the left side of the device when viewed from the front; verify this matches your distribution board's busbar arrangement before wiring. Tightening torque is 2.5 to 3 N·m — use a torque screwdriver; under-torquing creates a high-resistance joint that can thermally damage the device over time. IP20 protection applies only when installed in a distribution board with conductors connected; the device itself is not sealed against dust ingress. ## Environmental and lifecycle","metaTitle":"Siemens 5SM3342-6KL SENTRON RCCB, 4P Type A, 25A, 30mA, 400V","metaDescription":"Siemens 5SM3342-6KL SENTRON 4-pole RCCB, Type A, 25 A rated current, 30 mA trip sensitivity, 400 V AC. DIN rail mount. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Solid":"1.5 ... 25 mm²","Width":"72 mm","Height":"90 mm","Stranded":"1.5 ... 25 mm²","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"4","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Product variations":"N left","Ambient temperature":"-25 ... +45 °C","Operating frequency":"50Hz","Product designation":"RCCB","Protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage category":"III","Design of the product":"Instantaneous","Number of width units":"4","Type of fault current":"A","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"25 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"top or bottom","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"400 V","Surge current resistance / rated value":"1 kA","Switching function / short-term delayed":"No","Tripping residual current / rated value":"30 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"100 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=162054&mlfb=5SM3342-6KL","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3342-6KL/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM3342-6KL?","answer":"Pricing and stock levels are confirmed at quote time. Submit an RFQ through the storefront; the part is sourced to order through independent distribution channels."},{"question":"What are the key ratings for 5SM3342-6KL?","answer":"4-pole Type A RCCB, 25 A rated current, 30 mA trip sensitivity, 400 V AC, 10 kA short-circuit current rating, DIN rail mount, N-left design."},{"question":"What is the depth of the 5SM3342-6KL?","answer":"The overall depth is 77 mm, with an installation depth of 70 mm behind the panel door."},{"question":"Will 5SM3342-6KL drop into a panel specified around 5SL4363-7?","answer":"No — the 5SL4363-7 is a Siemens 5SL series MCB (miniature circuit breaker), not an RCCB. They serve different protection functions (overcurrent vs. earth leakage) and are not direct replacements. The 5SM3342-6KL is an RCCB and requires a separate overcurrent protective device upstream."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3342-6KL","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/5SM3342-6KL 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}}