{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"5SM3448-0","brand":"Siemens","brandSlug":"siemens","productSlug":"5SM3448-0","canonicalUrl":"https://aoctrl.com/siemens/5SM3448-0","factsUrl":"https://aoctrl.com/api/mcp/products/5SM3448-0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON RCCB, 4-pole, type AC, instantaneous, 100 A rated current, 100 mA residual sensitivity, 400 V AC, 50 Hz.","salesMarkdown":"## Siemens 5SM3448-0 SENTRON RCCB — 4-Pole, 100 A, 100 mA, Type AC The Siemens 5SM3448-0 is a 4-pole residual current circuit breaker (RCCB) from the SENTRON family, rated for 100 A at 400 V AC, 50 Hz, with a 100 mA residual current sensitivity and instantaneous (type AC) tripping characteristic. Type AC detection responds to sinusoidal AC residual currents only. The 100 mA sensitivity provides supplementary protection against fire risk from earth faults. Rated for 100 A continuous load, this RCCB is sized for heavy sub-distribution or main incomer duty in commercial and industrial panelboards. ## Panel Integration Snap-on DIN rail mounting for standard 35 mm rail. The 4-pole width occupies four modular units (72 mm) in the enclosure. Spring-cage or screw terminals accept conductors up to the rated cross-section for 100 A; verify lug sizing against the panel's gland plate and fill factor.","metaTitle":"Siemens 5SM3448-0 SENTRON RCCB, 4-Pole, 100 A, 100 mA, 400 V","metaDescription":"Siemens SENTRON 5SM3448-0 RCCB, 4-pole, type AC, instantaneous, 100 A, 100 mA, 400 V AC, 50 Hz. 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":{"Number Of Poles":"4","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"RCCB","Design Of The Product":"Instantaneous","value range of the supply voltage at AC":"400 V","Value Range Of The Supply Voltage Frequency":"50 Hz"}},"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=177878&mlfb=5SM3448-0","alternativesUrl":"https://aoctrl.com/api/mcp/products/5SM3448-0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of 5SM3448-0?","answer":"4-pole RCCB, type AC (sinusoidal residual current only), 100 A rated current, 100 mA residual sensitivity, 400 V AC, 50 Hz, instantaneous tripping."},{"question":"Will 5SM3448-0 drop into a panel specified around 5SQ2670-2YA63?","answer":"No — the 5SQ2670-2YA63 is a 4-pole MCB (miniature circuit breaker) with a 63 A rating and C-curve overcurrent protection, while the 5SM3448-0 is an RCCB with 100 A rating and no overcurrent protection. They serve different functions and are not drop-in substitutes without rewiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/5SM3448-0","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/5SM3448-0 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}}