{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4BA10-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4BA10-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2021-4BA10-ZW96, CLASS 10, 25 kA at 400 V, phase failure detection, screw terminals, 45 mm wide.","salesMarkdown":"## What this breaker does for a motor circuit The breaker also detects phase failure, so a lost phase on the line side won't cook the winding while the motor tries to single-phase run. Rated short-circuit breaking capacity hits 100 kA at 240 V and 25 kA at 400 V — that's enough to clear a bolted fault on a 400 V distribution board without upstream fuses needing to coordinate. The gL/gG fuse backup ratings (63 A at 400 V, 50 A at 500/690 V) give you a clean Type 2 coordination path for contactor combinations. Width is 45 mm, depth 97 mm — fits a standard 45 mm slot on a 35 mm DIN rail per DIN EN 60715. Screw and snap-on mounting means you can clip it onto the rail without tools, then secure with the screw if vibration is a concern. ## Terminals and wiring Main circuit terminals are M4 screw-type, accepting 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper. That's enough for a 10 mm² feed to a motor up to about 10 hp at 460/480 V. The screw terminals are standard for panel builders who prefer a positive clamp over spring cages for high-vibration environments.","metaTitle":"Siemens 3RV2021-4BA10-ZW96 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens 3RV2021-4BA10-ZW96 SIRIUS motor protection circuit breaker, CLASS 10 trip, 25 kA at 400 V. Phase failure detection, screw terminals. Active production. Quoted on request.","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":"20 A","at 500 V rated value":"5 kA","at 600 V rated value":"20 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":"1.5 hp","at 200/208 V rated value":"7.5 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 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":"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","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":"260 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":"13 ... 20 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=140276&mlfb=3RV2021-4BA10-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2021-4BA10-ZW96 at 400 V?","answer":"25 kA at 400 V. At 240 V it's 100 kA; at 690 V it drops to 2 kA."},{"question":"Does 3RV2021-4BA10-ZW96 detect phase failure?","answer":"Yes, phase failure detection is built in. No ground fault detection."},{"question":"What is the width of 3RV2021-4BA10-ZW96?","answer":"45 mm wide, 97 mm deep, 97 mm tall."},{"question":"Where can I buy the 3RV2021-4BA10-ZW96?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-ZW96","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/3RV2021-4BA10-ZW96 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}}