{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3344-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3344-6","canonicalUrl":"https://aoctrl.com/siemens/5SM3344-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3344-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 5SM3344-6, 4-pole, 40 A at 40 °C, 30 mA trip, Type A, 400 V AC, instantaneous, DIN rail mount.","salesMarkdown":"The Siemens 5SM3344-6 is a SENTRON residual current circuit breaker (RCCB) — a 4-pole, Type A device rated for 40 A at 40 °C with a 30 mA trip threshold and a 400 V AC supply. That makes it the baseline for most commercial and light-industrial panels today; you'd step up to Type B only if three-phase rectifiers or frequency converters are in the circuit. The 30 mA trip threshold is the standard for personal shock protection in most IEC-governed installations — it's the level that protects against ventricular fibrillation under dry-body conditions. The 40 A continuous rating holds at 40 °C ambient; at 45 °C it still carries 40 A, then derates to 38.4 A at 50 °C, 36.8 A at 55 °C, and steps down to 32 A at 70 °C. If your panel runs hot, use the 50 °C or 60 °C column for sizing. The let-through energy is rated at 70 000 A²·s, and the surge current withstand is 1 kA (8/20 µs waveform). ## Panel integration IP20 with connected conductors in an installed distribution board — standard for enclosed panels, not for open washdown areas. Mounting position is unrestricted, which simplifies layout in tight enclosures. Silicon-free construction, so it's safe for use in automotive paint-shop or coating environments where silicone outgassing can cause adhesion failures.","metaTitle":"Siemens 5SM3344-6 SENTRON RCCB, 40A, 30mA, Type A, 4P","metaDescription":"Siemens 5SM3344-6 SENTRON RCCB, 40A rated at 40°C, 30mA trip, Type A, 4-pole, 400V AC. DIN rail mount, IP20. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"77 mm","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Rated Value":"50 Hz","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Operating Frequency":"50 Hz","Product Designation":"RCCB","acc. to IEC 81346-2":"F","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Residual Current Type":"A","acc. to DIN EN 61346-2":"F","I2t value / permissible":"70 000 A²·s","at 40 °C / rated value":"40 A","at 45 °C / rated value":"40 A","at 50 °C / rated value":"38.4 A","at 55 °C / rated value":"36.8 A","at 60 °C / rated value":"35.2 A","at 65 °C / rated value":"33.6 A","at 70 °C / rated value":"32 A","Number Of Modular Width Units":"4","Product Feature / Silicon-Free":"Yes","acc. to EN 60898 / rated value":"0.8 kA","Position / Of Power Supply Cord":"top or bottom","Let-Through Current / Permissible":"7 500 kA","Tripping Fault Current / Rated Value":"30 mA","supply voltage / at AC / rated value":"400 V","Surge Current Resistance / Rated Value":"1 kA","according to IEC 61008-1 / rated value":"0.8 kA","Switching Function / Short-Term Delayed":"No","operational current / at AC / rated value":"40 A","Supply Voltage / For Testing Equipment / Minimum":"100 V","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Switching Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$250.89","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=505208&mlfb=5SM3344-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3344-6/alternatives.json"},"ai":{"faq":[{"question":"What is 5SM3344-6's rated current and trip sensitivity?","answer":"Rated 40 A at 40 °C ambient with a 30 mA residual trip current, Type A detection, 4-pole, 400 V AC."},{"question":"Where can I buy 5SM3344-6 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is listed here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3344-6","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/5SM3344-6 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}}