{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1CA20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1CA20","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1CA20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1CA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-1CA20 motor protection circuit breaker, Class 10 trip, 100 kA breaking capacity at 400 V AC, spring-loaded terminals, 45 mm wide, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Motor protection circuit breaker for high-fault-current panels Rated insulation voltage spans 20…690 V, and the breaking capacity holds at 100 kA up through 500 V AC, then steps to 10 kA at 690 V AC. That covers most 400 V and 480 V distribution systems found in industrial plants; the 690 V rating handles mining or marine installations where 690 V is the standard motor voltage. Spring-loaded terminals on the main circuit accept 2× (1…10 mm²) solid or stranded, which covers the typical motor feeder up to about 7.5 kW (10 hp) at 400 V. ## Trip class and ambient derating in mill environments Class 10 trip is the standard for standard-efficiency induction motors; if the motor manufacturer specifies Class 10, this breaker is a direct fit. Operating ambient range is -20…+60 °C, which takes the radiant heat near a furnace line or motor control center without derating the thermal trip curve — a common concern when the MCC sits close to the process. Storage and transport range extends to -50…+80 °C, so the part survives warehouse extremes and unheated shipping containers. The 45 mm width (3 module spaces on a DIN rail) leaves room for a contactor and overload relay in the same enclosure — tight for a 100 kA rated device.","metaTitle":"Siemens 3RV2021-1CA20 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-1CA20 SIRIUS motor protection circuit breaker, Class 10 trip, 100 kA breaking capacity at 400 V AC, spring-loaded terminals, DIN rail mount. Sourced to order agains","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":"119 mm","Upwards":"50 mm","Forwards":"0 mm","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","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.17 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"2.5 A","at 500 V rated value":"100 kA","at 600 V rated value":"2.5 A","at 690 V rated value":"10 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","at 200/208 V rated value":"0.5 hp","at 220/230 V rated value":"0.5 hp","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"1.5 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"10 kA","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","at AC-3 at 400 V rated value":"2.5 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":"2.5 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"2.5 A","at AWG cables for main contacts":"2x (18 ... 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":"2.4 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 ... 6 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","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","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":"33 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":"1.8 ... 2.5 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=507405&mlfb=3RV2021-1CA20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1CA20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV2021-1CA20 and how do I get a price?","answer":"The 3RV2021-1CA20 is sourced 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 delivery commitment."},{"question":"What is 3RV2021-1CA20's listed depth?","answer":"The depth is 97 mm, which fits standard 120 mm deep enclosures with clearance for wiring behind the DIN rail."},{"question":"What is 3RV2021-1CA20's listed width?","answer":"The width is 45 mm, occupying three 15 mm module spaces on a 35 mm DIN rail."},{"question":"Will 3RV2021-1CA20 drop into a panel specified around 3RV2021-1GA25 without rewiring?","answer":"Both use the same SIRIUS 3RV2 footprint — 45 mm wide, same DIN rail mounting, same screw and snap-on fastening. The terminal arrangement is identical, so the panel cutout and wiring layout are compatible. The difference is in the trip setting range and breaking capacity; verify the motor FLA falls within the 3RV2021-1CA20's adjustable range before substitution."},{"question":"What compliance documentation does this brand provide for 3RV2021-1CA20?","answer":"Siemens SIRIUS components are typically supplied with CE declaration, UL/CSA listing, and RoHS/REACH compliance declarations. Specific document numbers are available on request with the RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1CA20","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/3RV2021-1CA20 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}}