{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SV3744-4","brand":"Siemens","brandSlug":"siemens","productSlug":"5SV3744-4","canonicalUrl":"https://aoctrl.com/siemens/5SV3744-4","factsUrl":"https://aoctrl.com/api/mcp/products/5SV3744-4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 5SV3744-4, 4-pole, Type B, 40 A rated, 500 mA residual trip, 10 kA SCCR, short-time delayed, DIN rail mount, IP20.","salesMarkdown":"The Siemens 5SV3744-4 is a SENTRON RCCB — a residual-current circuit breaker — in a 4-pole, Type B, short-time delayed design. It's rated 40 A continuous at 40 °C, trips on a 500 mA residual fault, and can clear a 10 kA short-circuit fault. The Type B classification means it detects smooth DC residual currents plus the usual AC and pulsed DC, so it's the right device for drives, UPS systems, or any load with rectifiers or frequency converters that dump DC fault current back onto the line. The short-time delayed characteristic (K-type or S-type in some families) prevents nuisance tripping from transient surge currents up to 3 kA. Snaps onto standard DIN rail (REG profile). Mounting position is unrestricted, which helps when you're wedging it into a tight corner of an existing panel. IP20 with conductors connected, so it's for use inside a distribution board enclosure, not out in the washdown zone. ## Thermal performance That's unusual for a thermal-magnetic device; it means the bimetal or electronic trip element is compensated for ambient temperature rise inside a warm panel.","metaTitle":"Siemens 5SV3744-4 SENTRON RCCB, Type B, 40 A, 4-Pole, 10 kA","metaDescription":"Siemens 5SV3744-4 SENTRON RCCB, 4-pole, Type B, 40 A rated, 500 mA trip, 10 kA SCCR, short-time delayed. DIN rail mount. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Residual Current Breakers (RCCB/RCBO)"],"specifications":{"Depth":"70 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","Maximum Permissible":"75 °C","Minimum Permissible":"-40 °C","Product Designation":"RCCB","at AC / rated value":"40 A","protection class IP":"IP20, if the distribution board is installed, with connected conductors","Overvoltage Category":"III","Design Of The Product":"Short-time delayed","Residual Current Type":"B","I2t value / permissible":"41 000 A²·s","at 40 °C / rated value":"40 A","at 45 °C / rated value":"40 A","at 50 °C / rated value":"40 A","at 55 °C / rated value":"40 A","at 60 °C / rated value":"40 A","at 65 °C / rated value":"40 A","at 70 °C / rated value":"40 A","Short-Circuit Current Rating":"10 kA","Number Of Modular Width Units":"4","Product Feature / Silicon-Free":"Yes","acc. to EN 60898 / rated value":"0.8 kA","For Testing Equipment / Minimum":"195 V","Let-Through Current / Permissible":"6 200 kA","Tripping Fault Current / Rated Value":"500 mA","Supply Voltage Frequency / Rated Value":"50 Hz","Surge Current Resistance / Rated Value":"3 kA","according to IEC 61008-1 / rated value":"0.8 kA","Switching Function / Short-Term Delayed":"Yes","size of installation devices / acc. to DIN 43880":"1","Mechanical Service Life (Operating Cycles) / Typical":"10 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a5428b70392542232233e406e6d777ba.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=810571&mlfb=5SV3744-4","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SV3744-4/alternatives.json"},"ai":{"faq":[{"question":"What does Type B residual current mean on this RCCB?","answer":"Type B detects smooth DC residual currents, AC sinusoidal, and pulsed DC — required for equipment with three-phase rectifiers, variable-frequency drives, or UPS systems where a Type A or AC device would miss a DC fault."},{"question":"What is the short-circuit current rating (SCCR) of the 5SV3744-4?","answer":"10 kA, which is the standard SCCR for a DIN-rail RCCB in a residential or light-commercial panel. It also carries an 0.8 kA rating per EN 60898 and IEC 61008-1 for the residual-current function."},{"question":"Will the 5SV3744-4 drop into a panel built for a 5SL4363-7?","answer":"Not without rewiring. The 5SL4363-7 is a 3-pole MCB; the 5SV3744-4 is a 4-pole RCCB. Same DIN-rail footprint, but the function and connections are different — the RCCB needs the neutral conductor through it, and it occupies 4 width units instead of 3."},{"question":"Where can I buy the 5SV3744-4?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SV3744-4","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/5SV3744-4 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}}