{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4DA10-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4DA10-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4DA10-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4DA10-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-4DA10-ZW97, Trip Class 10, 45 mm wide, screw-type terminals, phase failure detection, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Motor protection circuit breaker for Class 10 trip curve The Siemens 3RV2021-4DA10-ZW97 is a SIRIUS motor protection circuit breaker designed for motor protection, with a Trip Class 10 characteristic that clears a stalled-rotor overload within 10 seconds at 7.2× rated current — matching the thermal curve of standard IEC induction motors up to 15 hp at 460/480 V. It includes phase failure detection, which trips the breaker on loss of one phase to prevent single-phasing damage on delta-connected loads. ## Breaking capacity and back-up fuse coordination Rated short-circuit breaking capacity varies with line voltage: 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. For installations requiring higher fault-current withstand, the evidence specifies maximum back-up fuse ratings: gL/gG 63 A at 400 V, gL/gG 50 A at 500 V, and gL/gG 50 A at 690 V. These fuse values define the upstream coordination limit — select a fuse at or below these ratings to maintain the breaker's listed SCCR. ## Integration: panel footprint and wiring The breaker occupies a 45 mm wide DIN-rail footprint, with depth of 97 mm and height of 97 mm. Clearance requirements: 50 mm upwards, 50 mm downwards, 30 mm at the sides, zero forwards and zero backwards. Main circuit connections use screw-type terminals, accepting 2× (1 to 2.5 mm²) or 2× (2.5 to 10 mm²) solid or stranded copper; the main contact terminal screw size is M4.","metaTitle":"Siemens 3RV2021-4DA10-ZW97 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens 3RV2021-4DA10-ZW97 SIRIUS motor protection circuit breaker, Trip Class 10, 45 mm wide, screw terminals, phase failure detection. 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":"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","Trip Class":"CLASS 10","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":"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 motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","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","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"25 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","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","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"18 ... 25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69e3aae776a3a972c11948ccacc118a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=665283&mlfb=3RV2021-4DA10-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4DA10-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV2021-4DA10-ZW97 used for?","answer":"It is a SIRIUS motor protection circuit breaker with Trip Class 10, designed to protect IEC induction motors against overload, short-circuit, and phase failure."},{"question":"What are the key ratings of 3RV2021-4DA10-ZW97?","answer":"Trip Class 10, breaking capacity 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, 2 kA at 690 V; phase failure detection; screw-type terminals; 45 mm wide."},{"question":"Where can I buy 3RV2021-4DA10-ZW97?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4DA10-ZW97","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/3RV2021-4DA10-ZW97 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}}