{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4BA15-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4BA15-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4BA15-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA15-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor protection circuit breaker, 3RV2021-4BA15-ZX95, Class 10 trip, 45 mm width, 97 mm depth, screw and snap-on 35 mm DIN rail.","salesMarkdown":"It is part of the SIRIUS brand, a widely used industrial control component family. The breaker is rated for a voltage range of 20 to 690 V and offers a Class 10 trip characteristic, meaning it will trip within 10 seconds at 7.2x the thermal setting — fast enough to protect standard induction motors during a locked-rotor event without nuisance tripping on normal starts. Ground fault detection is not included, so for applications requiring ground-fault protection, an external GFCI or residual-current device would need to be added downstream. Depth is 97 mm, height 97 mm — a compact cube that fits in shallow enclosures. Clearance distances: 50 mm upwards and downwards, 30 mm at the sides, 0 mm forwards and backwards. That means you can butt it against the back panel and adjacent devices on the sides, but need breathing room above and below for arc venting and heat dissipation. Short-circuit breaking capacity is 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. At 480 V it is rated for 20 A continuous, and at 600 V also 20 A. At 400 V, 25 kA covers typical industrial service-entrance fault levels. For backup protection with gL/gG fuses: 63 A at 400 V, 50 A at 500 V and 690 V. This coordination data lets you size the upstream fuse to clear before the breaker reaches its breaking limit, maintaining selectivity in a distribution panel. Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 120/125/230 V, 0.15 A at 60 V. These are for the internal auxiliary switch used to signal the breaker's status to a PLC or indicator light. The main contact terminals accept M4 screws and 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire.","metaTitle":"Siemens SIRIUS 3RV2021-4BA15-ZX95 Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV2021-4BA15-ZX95 motor protection circuit breaker, Class 10 trip, 100 kA at 240 V, 45 mm wide. DIN-rail mount. Current production. Sourced 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":"97 mm","Upwards":"50 mm","at 24 V":"1 A","at 60 V":"0.15 A","Forwards":"0 mm","at 120 V":"0.5 A","at 125 V":"0.5 A","at 230 V":"0.5 A","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 Auxiliary Switch":"laterally","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)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","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","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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":"1","number of NO contacts for auxiliary contacts":"1","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Operating Cycles) Typical":"100 000","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","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","For Short-Circuit Protection Of The Auxiliary Switch Required":"Fuse gL/gG: 10 A, miniature circuit breaker C 6 A (short-circuit current Ik < 400 A)","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=239513&mlfb=3RV2021-4BA15-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA15-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RV2021-4BA15-ZX95?","answer":"The 3RV2021-4CA25 is a peer within the same SIRIUS family. Both are 45 mm wide motor protection breakers with Class 10 trip, but the 4CA25 variant typically has a different current setting range or auxiliary contact configuration. Check the specific current range and auxiliary contact count to confirm drop-in fit without rewiring."},{"question":"Will the 3RV2021-4BA15-ZX95 drop into a panel specified for the 3RV2021-4CA25?","answer":"Yes, both share the same 45 mm width, 97 mm depth, and DIN-rail mounting. The footprint and terminal layout are identical, so no rewiring or panel modification is needed. The difference is in the internal current setting range and possibly auxiliary contact configuration — verify those match your motor FLA before swapping."},{"question":"How do I get current pricing and availability for the 3RV2021-4BA15-ZX95?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our independent distribution network. Availability is typically good for current-production SIRIUS parts."},{"question":"What compliance documentation does Siemens provide for this breaker?","answer":"As a SIRIUS motor protection circuit breaker, it carries CE marking for the European market and is designed to meet IEC/EN 60947-2 and 60947-4-1 standards. UL and CSA listings are typical for the SIRIUS family, though the specific listing for this variant should be confirmed from the product label or Siemens documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4BA15-ZX95","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/3RV2021-4BA15-ZX95 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}}