{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3622-4KK14","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3622-4KK14","canonicalUrl":"https://aoctrl.com/siemens/5SM3622-4KK14","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3622-4KK14","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 5SM3 series RCCB, 2-pole, 25 A at AC, B+ fault current type, short-time delayed, DIN rail mount, IP20.","salesMarkdown":"## What this RCCB does on the line The Siemens 5SM3622-4KK14 is a 2-pole residual current circuit breaker (RCCB) from the SENTRON 5SM3 series, rated 25 A at 230 V AC and 50/60 Hz. It's a short-time delayed design (Type B+ fault current detection), meaning it handles smooth DC residual currents plus high-frequency AC components — common on drives, UPS systems, and PV inverters where standard AC/DC-sensitive RCCBs might nuisance trip. The 3 kA surge current resistance handles the inrush from capacitive loads or nearby lightning-induced transients. ## Thermal derating and conductor sizing The 25 A rating holds at ambient up to 45 °C. Above that, derate linearly: 24 A at 50 °C, 23 A at 55 °C, 22 A at 60 °C, 21 A at 65 °C, 20 A at 70 °C. If your panel runs hot (near a drive or transformer), the 20 A floor at 70 °C still covers most 20 A branch circuits without upsizing the RCCB. Terminals accept solid or stranded copper from 1.5 mm² up to 25 mm² — covers everything from a 1.5 mm² lighting circuit to a 25 mm² feeder. The 70 mm depth and 90 mm height are standard for this class; no panel cutout surprises. It's a fast mover in the RCCB category — the 25 A B+ type is a common spec for European-style panels with VFD or UPS loads. Keep it on the shelf if your facility runs mixed DC/AC residual current circuits.","metaTitle":"Siemens 5SM3622-4KK14 RCCB, B+ Type, 25 A, 2-Pole, DIN Rail","metaDescription":"Siemens SENTRON 5SM3622-4KK14 RCCB, 25 A rated, 2-pole, B+ fault current type, 10 kA SCCR, short-time delayed, DIN rail mount. Active 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":"70 mm","Solid":"1.5 ... 25 mm²","Width":"72 mm","Height":"90 mm","Stranded":"1.5 ... 25 mm²","at 40 Cel":"25 A","at 45 Cel":"25 A","at 50 Cel":"24 A","at 55 Cel":"23 A","at 60 Cel":"22 A","at 65 Cel":"21 A","at 70 Cel":"20 A","Rated Value":"50 Hz","Mounting type":"DIN rail (REG)","During Storage":"-40 ... +75 °C","Number of poles":"2","lifecycle_stage":"current","Mounting position":"any","Installation depth":"70 mm","Product brand name":"SENTRON","Ambient temperature":"-25 ... +45 °C","Operating frequency":"50/60Hz","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","Number of width units":"4","Type of fault current":"B+","acc. to DIN EN 61346-2":"F","acc. to DIN EN 81346-2":"F","I2t-value / permissible":"70 000 A²·s","circuit-breaker / Design":"5SM3","Short-circuit current rating":"10 kA","Current / at AC / rated value":"25 A","Product feature / silicon-free":"Yes","Position / of power supply cord":"Top or bottom (bottom for SIGRES function also in switched-off state)","Protection against electrical shock":"Finger and back-of-hand safe","Supply voltage / at AC / rated value":"230 V","Surge current resistance / rated value":"3 kA","Switching function / short-term delayed":"Yes","Tripping residual current / rated value":"300 mA","Tightening torque / with screw-type terminals":"2.5 ... 3 N·m","Size of installation devices / acc. to DIN 43880":"1","Supply voltage / for testing equipment / minimum":"195 V","Mechanical service life (switching cycles) / typical":"10 000"}},"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=233374&mlfb=5SM3622-4KK14","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3622-4KK14/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source — 5SY4304-7CV?","answer":"The 5SY4304-7CV is a different class (MCB, not RCCB) — it won't drop into the same application. The 5SM3622-4KK14 is a residual current device; the 5SY series are miniature circuit breakers. No direct functional substitute exists; stick with the 5SM3 series for B+ type RCCB requirements."},{"question":"What compliance documentation does this brand provide for 5SM3622-4KK14?","answer":"The product carries Siemens SENTRON branding and is designed to DIN EN 61346-2 and DIN EN 81346-2 standards. It's rated overvoltage category III and finger/back-of-hand safe per protection against electrical shock. For specific RoHS/REACH/UL declarations, these are managed at the brand level — request compliance documentation with your RFQ."},{"question":"Where can I buy 5SM3622-4KK14 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here. Submit an RFQ for volume pricing and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3622-4KK14","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/5SM3622-4KK14 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}}