{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3345-6","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3345-6","canonicalUrl":"https://aoctrl.com/siemens/5SM3345-6","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3345-6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3345-6, 4-pole Type A RCCB, 125 A rated current, 30 mA sensitivity, 400 V AC, 10 kA short-circuit current rating, DIN rail mount.","salesMarkdown":"The Siemens SENTRON 5SM3345-6 is a 4-pole Type A residual current circuit breaker (RCCB) rated for 125 A with a 30 mA trip sensitivity, operating at 400 V AC and 50 Hz. ## Panel integration Snap-on DIN rail (REG) mounting per. Occupies 4 modular width units (72 mm wide, 77 mm deep, 90 mm tall) — plan for that 4-MU slot in the distribution board. The IP20 rating applies once the board is installed with conductors connected; the front face is touch-safe, but the terminals are not finger-proof until wired. The 125 A rating on a 4-pole RCCB is a heavy feeder or submain device — not a final-circuit unit. At 125 A and 400 V, the per-pole power loss in hot operating state is 8.9 W, so four poles dissipate about 35.6 W inside the enclosure; factor that into the thermal budget, especially if the board is densely populated. The 30 mA sensitivity is standard for personnel protection (shock hazard) under IEC 61008-1. The device is instantaneous (no short-time delay), so it trips immediately on a residual fault; it cannot be used for selective coordination with downstream RCDs unless you add a time-delay module upstream. Rated for ambient temperatures from -25 °C to +45 °C, with storage down to -40 °C. Overvoltage category III (distribution-level). Silicon-free construction — relevant for automotive or paint-shop environments where silicone outgassing causes adhesion failures.","metaTitle":"Siemens 5SM3345-6 SENTRON RCCB, 125A 30mA 4P Type A","metaDescription":"Siemens SENTRON 5SM3345-6 4-pole RCCB, 125 A rated, 30 mA sensitivity, Type A, 400 V AC, 10 kA SCCR. Current lifecycle stage. 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","Width":"72 mm","Height":"90 mm","Maximum":"45 °C","Minimum":"-25 °C","Number Of Poles":"4","lifecycle_stage":"current","Fastening Method":"DIN rail (REG)","Mounting Position":"any","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Instantaneous","Product Feature Silicon-Free":"Yes","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"top or bottom","according to EN 60898 rated value":"1.25 kA","according to IEC 61008-1 rated value":"1.25 kA","Switching Function Short-Term Delayed":"No","Value Range Of The Operating Frequency":"50 Hz","value range of the supply voltage at AC":"400 V","Ambient Temperature During Storage Minimum":"-40 °C","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"100 V","Mechanical Service Life (Operating Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","for rated value of the current at AC in hot operating state per pole":"8.9 W"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1,235.71","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=205532&mlfb=5SM3345-6","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3345-6/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 5SM3345-6?","answer":"Pricing and stock are confirmed at quote time. Submit an RFQ — this part is sourced through independent distribution and quoted to order, with current availability and pricing provided on request."},{"question":"Will 5SM3345-6 drop into a panel specified around 5SL4363-7?","answer":"No — the 5SL4363-7 is a 3-pole miniature circuit breaker (MCB) occupying 3 modular units (54 mm wide), while the 5SM3345-6 is a 4-pole RCCB at 4 modular units (72 mm wide). The depth (77 mm vs 76 mm) and height (both 90 mm) are close, but the width difference and different function (MCB vs RCCB) mean the panel layout and wiring must change."},{"question":"What compliance documentation does Siemens provide for 5SM3345-6?","answer":"The part is rated according to EN 60898 and IEC 61008-1, with a 1.25 kA rated value per those standards. It carries overvoltage category III and IP20 protection class. RoHS and REACH compliance documentation is standard for the SENTRON series, though specific certificates are not listed in this record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3345-6","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/5SM3345-6 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}}