{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2321-1HC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2321-1HC20","canonicalUrl":"https://aoctrl.com/siemens/3RV2321-1HC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2321-1HC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2321-1HC20, for starter combinations, 8 A at 480 V, 100 kA SCCR at 400 V, spring-loaded terminals, screw and snap-on DIN rail mount.","salesMarkdown":"It also carries 100 kA SCCR at 240 V, 42 kA at 500 V, and 6 kA at 690 V, so it holds up across common industrial voltages without needing an upstream current-limiting fuse. The 45 mm width (3 module spaces) and 97 mm depth fit standard distribution boards; clearance needs are 50 mm above and below, 30 mm to the side, zero forward or backward. That spring-cage saves panel build time vs screw clamps, but verify your ferrule length if using stranded. The 8 A rating at 480 V and 600 V sets the continuous current limit for the motor branch — pair it with a contactor sized for the same FLA. The switching rate is capped at 15 operations per hour under AC-3 duty (motor starting), adequate for most pump and fan cycles but not for frequent jogging. No ground-fault or phase-failure detection built in — those functions need an external relay or a different SIRIUS variant. ## Temperature range The wide storage range matters for spares held in unheated warehouses or shipped in cold climates — the breaker can sit at -50 °C without damage, though it won't be rated to switch until it warms above -20 °C.","metaTitle":"Siemens 3RV2321-1HC20 SIRIUS Circuit Breaker, 100 kA SCCR at","metaDescription":"Siemens 3RV2321-1HC20 SIRIUS circuit breaker for starter combinations. 100 kA SCCR at 400 V AC, 8 A rated current at 480 V, DIN rail mount. Sourced to order against RFQ.","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","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","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 standard mounting rail according to DIN EN 60715","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"1 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"8 A","at 500 V rated value":"42 kA","at 600 V rated value":"8 A","at 690 V rated value":"4 kA","Design Of The Product":"For starter combinations","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.33 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"2 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"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":"42 kA","at AC at 690 V rated value":"6 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":"9.25 W","at AC-3 at 400 V rated value":"8 A","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"8 A","at AWG cables for main contacts":"2x (18 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Between Main And Auxiliary Circuit":"400 V","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":"3.1 W","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 (Switching 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":"104 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0714b9fc1c964c8b77cf28ba335260f7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=16719&mlfb=3RV2321-1HC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2321-1HC20/alternatives.json"},"ai":{"faq":[{"question":"What is the SCCR of the 3RV2321-1HC20 at 400 V?","answer":"100 kA at 400 V AC, which also applies at 240 V AC. At 500 V it drops to 42 kA, and at 690 V to 6 kA."},{"question":"Where can I buy the 3RV2321-1HC20 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"What are the mounting dimensions and clearances for the 3RV2321-1HC20?","answer":"Width 45 mm, height 119 mm, depth 97 mm. Clearances: 50 mm above and below, 30 mm to the side, zero forward or backward. Mounts on 35 mm DIN rail per EN 60715, any orientation."},{"question":"Does the 3RV2321-1HC20 include ground fault or phase failure protection?","answer":"No — this variant has no ground-fault detection and no phase-failure detection. Those functions require an external relay or a different SIRIUS order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2321-1HC20","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/3RV2321-1HC20 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}}