{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-0JA38-1KT0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-0JA38-1KT0","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-0JA38-1KT0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0JA38-1KT0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1021-0JA38-1KT0 motor protection circuit breaker, CLASS 10 trip class, 1 A continuous current, 100 kA breaking capacity at 400 V AC, screw-type main terminals, spring-loaded auxiliary terminals, IP20 front, 45 mm width.","salesMarkdown":"The Siemens SIRIUS 3RV1021-0JA38-1KT0 is a motor protection circuit breaker designed for 1 A continuous current with CLASS 10 trip characteristics, meaning it trips within 10 seconds at 7.2× the thermal setting — standard for protecting standard induction motors during start-up. It mounts via screw or snap-on onto 35 mm DIN rail per EN 50022, takes any mounting position, and measures 45 mm wide by 97 mm high by 96 mm deep. The main circuit uses screw-type terminals accepting 2x (0.25... 2.5 mm²) solid or 2x (24... 14) AWG; the auxiliary and control circuit uses spring-loaded terminals. ## Breaking capacity and duty This breaker delivers 100 kA breaking capacity across the board — at 240 V, 400 V, 500 V, and 690 V AC — so it handles high-fault industrial panels without cascading upstream. The AC-3 motor-switching rating maxes out at 690 V, and at 400 V it's rated for 0.25 kW motor load. Maximum operating frequency in AC-3 duty is 15 operations per hour. ## Auxiliary switch and environmental ratings The auxiliary switch is transverse design and field-addable (product extension auxiliary switch is yes). Switching capacity: 1 A at 24 V, 0.15 A at 60 V, 0.5 A at 230 V. Surge voltage resistance is 6 000 V. Shock resistance is 25 g for 11 ms. Front protection class is IP20 — suitable for enclosed panels, not for washdown environments.","metaTitle":"Siemens 3RV1021-0JA38-1KT0 SIRIUS Motor Protection CB, CLASS","metaDescription":"Siemens SIRIUS 3RV1021-0JA38-1KT0 motor protection circuit breaker, CLASS 10 trip, 1 A continuous, 100 kA breaking capacity at 400 V AC. Active production. Quote on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"97 mm","at 24 V":"1 A","at 60 V":"0.15 A","at 230 V":"0.5 A","Backwards":"0 mm","Trip Class":"CLASS 10","At The Side":"0 mm","Rated Value":"690 V","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Shock Resistance":"25g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","at 400 V rated value":"0.25 kW","Design Of The Product":"for motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","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":"100 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"7.25 W","Substance Prohibitance (Date)":"01.05.2012","Continuous Current Rated Value":"1 A","Design Of The Auxiliary Switch":"transverse","at AWG cables for main contacts":"2x (24 ... 14)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AWG cables for auxiliary contacts":"2x (24 ... 14)","at AC in hot operating state per pole":"2.4 W","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"1 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"thermomagnetic","Arrangement Of Electrical Connectors For Main Current Circuit":"front side","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"100 000","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.7 ... 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=534624&mlfb=3RV1021-0JA38-1KT0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-0JA38-1KT0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV1021-0JA38-1KT0?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is 3RV1021-0JA38-1KT0's listed depth?","answer":"The depth is 96 mm, with a width of 45 mm and height of 97 mm, fitting standard 35 mm DIN rail per EN 50022."},{"question":"What compliance documentation does this part carry?","answer":"The RoHS substance prohibition date is 01.05.2012, indicating compliance with the EU RoHS directive from that date. The part is a Siemens SIRIUS product, which typically carries UL, CSA, and CE certifications, though specific marks are not listed in this record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-0JA38-1KT0","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/3RV1021-0JA38-1KT0 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}}