{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3342-4","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3342-4","canonicalUrl":"https://aoctrl.com/siemens/5SM3342-4","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3342-4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 4-pole, 25 A rated, 30 mA trip, Type B, short-time delayed, DIN rail, 400 V AC, 50/60 Hz.","salesMarkdown":"The Siemens SENTRON 5SM3342-4 is a 4-pole residual current circuit breaker (RCCB) rated at 25 A with a 30 mA trip threshold, Type B detection, and short-time delayed switching — built for universal current-sensitive protection on 400 V AC, 50/60 Hz networks. Type B residual current detection covers AC, pulsating DC, smooth DC, and high-frequency AC fault currents — the only type that catches rectifier-fed loads, VFD leakage, and UPS ground faults without nuisance tripping. Short-time delayed design means it withstands brief inrush or surge currents up to 3 kA without tripping, making it suitable for circuits with capacitive loads or equipment that draws a startup pulse. Above that, the curve steps down: 23.5 A at 50 °C, 22 A at 55 °C, 20.5 A at 60 °C, 19 A at 65 °C, 17.5 A at 70 °C (–). If the panel runs hot, size the upstream breaker accordingly. The let-through current is capped at 7 500 A and the I²t at 70 000 A²·s. Snap-on DIN rail (REG) mounting in any orientation. Occupies 4 modular width units — 72 mm wide, 90 mm tall, 77 mm deep plus 70 mm installation depth. Silicon-free construction — relevant for automotive or paint-shop panels where silicone outgassing can cause adhesion or coating defects.","metaTitle":"Siemens SENTRON 5SM3342-4 RCCB, 4-pole, 25 A, 30 mA, Type B","metaDescription":"Siemens SENTRON 5SM3342-4 4-pole RCCB, 25 A rated, 30 mA trip, Type B, short-time delayed. 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","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","at AC rated value":"25 A","Installation Depth":"70 mm","Product Brand Name":"SENTRON","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RCCB","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Short-time delayed","I2t value permissible":"70 000 A²·s","Residual Current Type":"B","at 40 °C rated value":"25 A","at 45 °C rated value":"25 A","at 50 °C rated value":"23.5 A","at 55 °C rated value":"22 A","at 60 °C rated value":"20.5 A","at 65 °C rated value":"19 A","at 70 °C rated value":"17.5 A","Product Feature Silicon-Free":"Yes","Number Of Modular Width Units":"4","Position Of Power Supply Cord":"Top or bottom (bottom for SIGRES function also in switched-off state)","Let-Through Current Permissible":"7 500 A","according to EN 60898 rated value":"0.8 kA","Tripping Fault Current Rated Value":"30 mA","Surge Current Resistance Rated Value":"3 kA","according to IEC 61008-1 rated value":"0.8 kA","Switching Function Short-Term Delayed":"Yes","Value Range Of The Operating Frequency":"50/60 Hz","value range of the supply voltage at AC":"400 V","Value Range Of The Supply Voltage Frequency":"50 Hz","Supply Voltage For Testing Equipment Minimum":"195 V","Mechanical Service Life (Switching Cycles) Typical":"10 000","Product Extension Installable Supplementary Devices":"Yes","for rated value of the current at AC in hot operating state per pole":"0.5 W"}},"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=293135&mlfb=5SM3342-4","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3342-4/alternatives.json"},"ai":{"faq":[{"question":"What is the 5SM3342-4 used for?","answer":"It is a 4-pole Type B RCCB rated 25 A, 30 mA trip, short-time delayed — used for personal shock protection and ground-fault detection on 400 V AC final circuits, especially where VFDs, rectifiers, or UPS equipment generate smooth DC or high-frequency leakage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3342-4","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/5SM3342-4 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}}