{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2321-1CC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2321-1CC20","canonicalUrl":"https://aoctrl.com/siemens/3RV2321-1CC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2321-1CC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2321-1CC20 circuit breaker for starter combinations, 100 kA SCCR at 400 V AC, spring-loaded terminals, 45 x 119 x 97 mm.","salesMarkdown":"## What this breaker does in a panel The headline number here is the interrupting rating: 100 kA at 240 V, 400 V, and 500 V AC, dropping to 10 kA at 690 V AC. The 690 V rating at 10 kA still covers most industrial 690 V drives and distribution. No screw torque to verify, no loosening from vibration — a maintenance advantage on a line that sees frequent starts. The breaker occupies 45 mm width, 119 mm height, 97 mm depth on the DIN rail. That 50 mm top clearance is the one that catches panel builders — skimping on it blocks heat dissipation from the bimetal trip and can cause nuisance tripping at rated current. The -20 °C floor matters for unheated enclosures in cold climates — the bimetal trip curve shifts below that, but the spec says it's rated down to -20. ## What it does not do — and why that matters This breaker has no ground-fault detection and no phase-failure detection. It is a thermal-magnetic motor circuit protector, not a full-featured electronic motor protection relay. If the application requires ground-fault or phase-loss tripping, you need an external relay (e.g., Siemens 3RB series) upstream or in series. For a standard pump or fan starter where the contactor already provides phase-loss protection via the control circuit, this omission is irrelevant. The switching frequency is capped at 15 operations per hour at AC-3 and AC-3e duty. That is fine for most motor starting (a pump cycling every 4 minutes), but not for jogging or rapid reversing. If the application calls for frequent inching, step up to a dedicated contactor with a higher mechanical life.","metaTitle":"Siemens 3RV2321-1CC20 SIRIUS Circuit Breaker, 100 kA SCCR at","metaDescription":"Siemens SIRIUS 3RV2321-1CC20 circuit breaker for starter combinations. 100 kA SCCR at 400 V AC, spring-loaded terminals, 45 mm wide. Current lifecycle active. Sourced to order agai","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","title":"3RV2321-1CC20","Height":"119 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S0 for starter combination Rated current 2.5 A N-release 33 A Spring-type terminal Standard switching capacity","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.17 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"2.5 A","at 500 V rated value":"100 kA","at 600 V rated value":"2.5 A","at 690 V rated value":"10 kA","Design Of The Product":"For starter combinations","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"spring-loaded terminals","at 200/208 V rated value":"0.5 hp","at 220/230 V rated value":"0.5 hp","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"1.5 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"10 kA","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","at AC-3 at 400 V rated value":"2.5 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"2.5 A","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"2.5 A","at AWG cables for main contacts":"2x (18 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"2.4 W","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","with high demand rate according to SN 31920":"50 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Operating Cycles) Typical":"100 000","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"33 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7d7826f40fe09e0de38c4c4353fb0659.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=122190&mlfb=3RV2321-1CC20"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2321-1CC20","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/3RV2321-1CC20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}