{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2721-4BD10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2721-4BD10","canonicalUrl":"https://aoctrl.com/siemens/3RV2721-4BD10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2721-4BD10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2721-4BD10, size S0, 45 mm width, 25 kA at 400 V AC, UL 489, screw and snap-on 35 mm DIN rail.","salesMarkdown":"It carries a 25 kA interrupting rating at 400 V AC and is UL 489 / CSA C22.2 No. 5 listed, making it suitable for North American panel builds where branch-circuit protection is required. At 500 V the rating drops to 5 kA, and at 690 V to 2 kA, so if your line voltage is higher than 400 V, verify the available fault current is within these limits. The gG fuse backup ratings (63 A at 400 V, 50 A at 500/690 V) define the maximum upstream fuse for selectivity; exceed those and the breaker may not coordinate. Rated operational voltage spans 20...690 V, covering most low-voltage industrial supplies. The 5.5 kW motor rating at 230 V gives a quick sizing reference for direct-on-line motor starting at that voltage. Snap-on onto 35 mm DIN rail per DIN EN 60715 — no tools needed for the rail mount, though the screw-type terminals for the main circuit require a Pozidriv size 2 tip (shaft diameter 5 to 6 mm). Clearance requirements: 70 mm above and below, 30 mm to the side, 0 mm forward and backward — so you can butt it against the back panel or a busbar without extra spacing.","metaTitle":"Siemens 3RV2721-4BD10 SIRIUS Circuit Breaker, 45 mm, 25 kA a","metaDescription":"Siemens SIRIUS 3RV2721-4BD10 circuit breaker, size S0, 45 mm wide, 25 kA SCCR at 400 V AC. UL 489 listed. Current 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":"20 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":"20 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"20 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":"260 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3b9cc4ef638694a094792821ecc0ad2f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=181991&mlfb=3RV2721-4BD10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2721-4BD10/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV2721-4BD10?","answer":"Submit an RFQ through the storefront; pricing and stock are confirmed at quote time through independent distribution channels."},{"question":"What is 3RV2721-4BD10's listed depth?","answer":"The depth is 97 mm, which fits standard S0 depth envelopes."},{"question":"What is 3RV2721-4BD10's listed width?","answer":"The width is 45 mm, the standard S0 width for this series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2721-4BD10","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/3RV2721-4BD10 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}}