{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2321-4DC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2321-4DC10","canonicalUrl":"https://aoctrl.com/siemens/3RV2321-4DC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2321-4DC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker 3RV2321-4DC10, 45 mm width, for starter combinations, 100 kA breaking capacity at 240 V AC, screw-type terminals, DIN rail mount.","salesMarkdown":"Rated voltage spans 20 to 690 V, covering most low-voltage motor circuits globally. At 400 V the breaking capacity is 25 kA, at 500 V it drops to 5 kA, and at 690 V to 2 kA — so the SCCR headroom shrinks as line voltage rises; verify your point-of-fault current at the actual system voltage. The motor horsepower ratings are given for several common voltages: 3 hp at 230 V, 7.5 hp at 220/230 V, 15 hp at 460/480 V. This tells you the maximum motor frame it can protect at those voltages — not the continuous current rating alone, but the motor full-load current the breaker is calibrated to coordinate with. The switching frequency is limited to 15 operations per hour at AC-3 and AC-3e duty — that is about one start every four minutes, so it is sized for infrequent starting (pumps, fans, compressors) rather than jogging or high-cycle applications. Fuse backup ratings are specified: at 400 V use a gL/gG 63 A fuse upstream, at 500 V and 690 V use gL/gG 50 A. These are the maximum fuse sizes that preserve the breaker's interrupting rating — if you fuse higher, the breaker may not clear a fault safely. The conductor cross-section accepted is 2x 1 to 2.5 mm² or 2x 2.5 to 10 mm² solid or stranded, with M4 screws on the main contacts. ## Physical fit and clearance needs Dimensions are 45 mm width, 97 mm height, 97 mm depth. The 45 mm width is three standard 15 mm module spaces on DIN rail — important for panel fill calculations. Clearance requirements: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards and backwards. The zero forward/backward clearance means it can be mounted flush against a panel door or backplate without derating, but the 50 mm vertical gap above and below must be kept free for arc venting and heat dissipation.","metaTitle":"Siemens 3RV2321-4DC10 SIRIUS Circuit Breaker, 45 mm, 100 kA","metaDescription":"Siemens 3RV2321-4DC10 SIRIUS circuit breaker for starter combinations. 45 mm width, 100 kA breaking capacity at 240 V AC. DIN rail mount. Sourced to order.","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":"3RV2321-4DC10","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","at 400 V":"gL/gG 63 A","at 500 V":"gL/gG 50 A","at 690 V":"gL/gG 50 A","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 25 A N-release 325 A Screw 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","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"3 hp","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 480 V rated value":"25 A","at 500 V rated value":"5 kA","at 600 V rated value":"25 A","at 690 V rated value":"2 kA","Design Of The Product":"For starter combinations","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"55 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"10.5 W","at AC-3 at 400 V rated value":"25 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":"25 A","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"25 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 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":"3.5 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 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 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","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","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":"325 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/ae0ce82cd63105b5f4208ef453e1c7bb.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=501716&mlfb=3RV2321-4DC10"},"ai":{"faq":[{"question":"Where can I buy 3RV2321-4DC10 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3RV2321-4DC10's listed depth (97 mm) on this component line?","answer":"The depth is 97 mm, with a width of 45 mm and height of 97 mm. Clearance required: 50 mm above and below, 30 mm at the sides, zero forwards and backwards."},{"question":"What is 3RV2321-4DC10's listed width (45 mm) on this component line?","answer":"The width is 45 mm, which is three standard 15 mm DIN-rail module spaces. Height is 97 mm, depth 97 mm."},{"question":"What compliance documentation does this brand provide for 3RV2321-4DC10 (RoHS, REACH, UL, IEC)?","answer":"As a Siemens SIRIUS product, the 3RV2321-4DC10 is designed to meet applicable standards including DIN EN 60715 for DIN rail mounting. For specific compliance documentation (RoHS, REACH, UL, IEC), request the manufacturer's declaration at quote time — it is typically available as a standard document for current-production SIRIUS circuit breakers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2321-4DC10","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/3RV2321-4DC10 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}}