{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2721-4CD10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2721-4CD10","canonicalUrl":"https://aoctrl.com/siemens/3RV2721-4CD10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2721-4CD10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2721-4CD10 circuit breaker, size S0, 25 kA breaking capacity at 400 V AC, screw and snap-on DIN rail mount, for system protection per UL 489.","salesMarkdown":"The Siemens 3RV2721-4CD10 is a SIRIUS circuit breaker in the S0 frame size, designed for system protection per UL 489 and CSA C22.2 No. 5. Rated voltage range spans 20 to 690 V, with a 25 kA breaking capacity at 400 V AC and 55 kA at 400 V AC under the UL/CSA rating path. At 230 V, it handles motor loads up to 5.5 kW. Backup fuse ratings are specified per voltage: gG 63 A at 400 V, gG 50 A at 500 V and 690 V. These limit let-through energy and protect downstream components during a high-fault event. ## Panel integration and clearances Required clearances: 70 mm above and below, 30 mm to the side, 0 mm forward and backward. No extra side gap needed if mounted against a panel wall. Main contact screws are M4; use a Pozidriv size 2 screwdriver with a 5–6 mm diameter shaft.","metaTitle":"Siemens 3RV2721-4CD10 SIRIUS Circuit Breaker, 25 kA at 400 V","metaDescription":"Siemens 3RV2721-4CD10 SIRIUS circuit breaker, size S0, 25 kA breaking capacity at 400 V AC. Screw and snap-on DIN rail mount. Active production. Quoted 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","Height":"144 mm","Upwards":"70 mm","Forwards":"0 mm","at 400 V":"gG 63 A","at 500 V":"gG 50 A","at 690 V":"gG 50 A","Backwards":"0 mm","Downwards":"70 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 DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"1 ... 10 mm², max. 2x 10 mm²","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"5.5 kW","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 500 V rated value":"5 kA","at 690 V rated value":"2 kA","Design Of The Product":"For system protection according to UL 489/CSA C22.2 No. 5","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals","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":"22 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":"22 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"22 A","at AWG cables for main contacts":"2x (14 ... 10)","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","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"1 ... 16 mm², max. 6 + 16 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":"2.5 ... 3 N·m","with high demand rate according to SN 31920":"50 %","shock resistance according to IEC 60068-2-27":"25 g / 11 ms (rectangular impulse and sine pulse)","Electrical Endurance (Operating Cycles) Typical":"100 000","at 480 AC Y/277 V according to UL 489 rated value":"50 kA","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":"286 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$104.14","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2c750c12bda70c9199acb46446ede1a7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=383398&mlfb=3RV2721-4CD10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2721-4CD10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2721-4CD10 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What is the closest functional second-source to 3RV2721-4CD10?","answer":"The 3RV2023-4DA10 is a peer in the same SIRIUS family and S0 frame size, but it carries different breaking capacity and trip characteristics. Verify coordination and selectivity before substituting — the 3RV2721-4CD10 is designed for system protection per UL 489, while the 3RV2023-4DA10 may target motor protection. They are not drop-in replacements without re-evaluating the circuit."},{"question":"What compliance documentation does this brand provide for 3RV2721-4CD10?","answer":"The breaker is designed for system protection per UL 489 and CSA C22.2 No. 5. Standard compliance documentation (RoHS, REACH, CE, UKCA, EAC) is available from the manufacturer's technical documentation portal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2721-4CD10","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/3RV2721-4CD10 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}}