{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4CA40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4CA40","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4CA40","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4CA40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor protection circuit breaker, 3RV2021-4CA40, Trip Class 10, 25 kA at 400 V, 45 mm wide, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## Motor protection circuit breaker, Trip Class 10, 25 kA at 400 V The 25 kA at 400 V rating is the short-circuit breaking capacity that governs selectivity with upstream fuses or breakers. For the main current circuit, the connection uses ring cable lug with M4 screw terminals. The rated value range spans 20 to 690 V, covering most low-voltage motor applications. Mounting position is any. Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards, 0 mm backwards. The 97 mm depth and 97 mm height fit standard enclosure depths.","metaTitle":"Siemens 3RV2021-4CA40 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-4CA40 SIRIUS motor protection circuit breaker, Trip Class 10, 25 kA at 400 V, 45 mm wide, screw and snap-on DIN rail mounting. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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","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":"22 A","at 500 V rated value":"5 kA","at 600 V rated value":"22 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":"Ring cable lug connection","at 110/120 V rated value":"1.5 hp","at 200/208 V rated value":"7.5 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":"size 2 and Pozidriv 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","Design Of The Short-Circuit Trip":"magnetic","For Auxiliary And Control Circuit":"ring terminal lug connection","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","For Main Contacts For Ring Cable Lug":"2 ... 2.5 N·m","Surge Voltage Resistance Rated Value":"6 kV","Of The Auxiliary And Control Contacts":"M3","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","Number Of Poles For Main Current Circuit":"3","For Auxiliary Contacts For Ring Cable Lug":"1.2 ... 0.8 N·m","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","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","Outer Diameter Of The Usable Ring Cable Lug Maximum":"7.5 mm","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","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"16 ... 22 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=28987&mlfb=3RV2021-4CA40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4CA40/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2021-4CA40 at 400 V?","answer":"The breaking capacity is 25 kA at 400 V. At 240 V it reaches 100 kA, and at 690 V it is 2 kA."},{"question":"What are the mounting clearances for 3RV2021-4CA40?","answer":"Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards, 0 mm backwards."},{"question":"Does 3RV2021-4CA40 include phase failure detection?","answer":"Yes, phase failure detection is included. Ground fault detection is not included."},{"question":"Where can I buy 3RV2021-4CA40?","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/3RV2021-4CA40","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/3RV2021-4CA40 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}}