{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM2343-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM2343-0","canonicalUrl":"https://aoctrl.com/siemens/5SM2343-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM2343-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON, RCD-unit, 4 poles, 40 A, 30 mA, AC type, instantaneous, 3 MW, IP20, 50 Hz.","salesMarkdown":"The Siemens 5SM2343-0 is a SENTRON RCD-unit (residual current device) designed for 4-pole AC circuits. It is rated 40 A at 50 Hz with a 30 mA fault trip threshold, AC residual current type, and instantaneous (non-time-delayed) response — meaning it trips immediately when leakage exceeds 30 mA, suitable for general shock protection in residential or commercial distribution boards. The unit occupies 3 modular width units (roughly 52.5 mm) on a DIN rail, with a depth of 70 mm and height of 90 mm. It mounts in any position and accepts top or bottom supply connections. At 40 °C ambient the continuous rating is 37.2 A, dropping to 32 A at 70 °C. The 40 A nominal rating applies at the standard 30 °C reference; above that, follow the derating curve from the spec table to avoid nuisance tripping from thermal effects rather than actual leakage. Rated insulation voltage is 460 V AC, surge voltage resistance 4 kV, overvoltage category III, pollution degree 2 — standard for fixed-installation distribution boards. The IP20 rating applies only when the distribution board is installed with connected conductors; the device itself is not sealed for wet environments. The unit is not sealable and has no adjustable trip threshold or OFF-delay. It is designed as a companion for the 5SL4 series MCBs (product variation noted for 5SL4).","metaTitle":"Siemens 5SM2343-0 SENTRON RCD, 40 A 30 mA 4-Pole AC Type","metaDescription":"Siemens 5SM2343-0 SENTRON RCD-unit, 4-pole, 40 A rated, 30 mA trip, AC type, instantaneous. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 mm","Width":"123 mm","title":"5SM2343-0","Height":"90 mm","Maximum":"75 °C","Minimum":"-40 °C","Sealable":"No","description":"RC unit for 5SL4, 4-pole, type AC, In: 40 A, 30 mA, Un AC: 400 V","Design Of Pole":"4 poles","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"REG","Mounting Position":"any","at AC rated value":"40 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Variations":"for 5SL4","Degree Of Pollution":"2","Product Designation":"RCD-unit","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"instantaneous","Residual Current Type":"AC","at 40 °C rated value":"37.2 A","at 45 °C rated value":"37.2 A","at 50 °C rated value":"36 A","at 55 °C rated value":"34.8 A","at 60 °C rated value":"34 A","at 65 °C rated value":"33.2 A","at 70 °C rated value":"32 A","OFF-delay time adjustable":"No","For Testing Equipment Minimum":"195 V","Number Of Modular Width Units":"3","Position Of Power Supply Cord":"top or bottom","Rated Fault Current Adjustable":"No","Protection Function False Tripping":"Yes","Tripping Fault Current Rated Value":"30 mA","insulation voltage (Ui) rated value":"460 V","Surge Voltage Resistance Rated Value":"4 000 V","Value Range Of The Operating Frequency":"50 Hz","Type Of Voltage Of The Operating Voltage":"AC","Value Range Of The Supply Voltage Frequency":"50 Hz","Mechanical Service Life (Operating Cycles) Typical":"10 000","for rated value of the current at AC in hot operating state per pole":"3.6 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b2ebf958d9404169f43343046dc8ed0b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=376997&mlfb=5SM2343-0"},"ai":{"faq":[{"question":"What are the key ratings of 5SM2343-0?","answer":"4-pole, 40 A rated current, 30 mA trip threshold, AC residual current type, instantaneous response, 460 V insulation voltage, 4 kV surge resistance, 50 Hz operating frequency."},{"question":"Where can I buy 5SM2343-0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What is the physical size of 5SM2343-0?","answer":"Width 123 mm (3 modular width units), height 90 mm, depth 70 mm."},{"question":"Does 5SM2343-0 work with 5SL4 series MCBs?","answer":"Yes, the product variation is explicitly noted as 'for 5SL4', meaning it is designed to pair with Siemens 5SL4 miniature circuit breakers in the same distribution board."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM2343-0","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/5SM2343-0 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}}