{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1021-1HA38-1KT1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1021-1HA38-1KT1","canonicalUrl":"https://aoctrl.com/siemens/3RV1021-1HA38-1KT1","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1021-1HA38-1KT1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1021-1HA38-1KT1, 8 A rated continuous current, Class 10 trip, 100 kA breaking capacity at 400 V AC, screw-type main terminals with spring-loaded auxiliary/control circuit terminals.","salesMarkdown":"## Motor protection circuit breaker, 8 A, Class 10 — SIRIUS 3RV1021-1HA38-1KT1 It switches a 3 kW motor load at 400 V AC (AC-3 duty) and delivers a 100 kA breaking capacity at 400 V AC, dropping to 42 kA at 500 V AC and 6 kA at 690 V AC. The main current circuit uses screw-type terminals (accepting 2x 0.25–2.5 mm² solid or 2x 24–14 AWG), while the auxiliary and control circuit uses spring-loaded terminals — a mixed termination scheme that saves panel wiring time on the control side while keeping power connections under a screw clamp. The 45 mm wide, 97 mm high, 96 mm deep footprint mounts via screw and snap-on onto a 35 mm DIN rail per EN 50022, in any mounting position. Power dissipation in hot operating state is 9.25 W, which should be factored into enclosure thermal calculations when grouping multiple breakers. At 240 V AC and 400 V AC the breaker achieves 100 kA breaking capacity — sufficient for most industrial panel fault levels. At 500 V AC it drops to 42 kA, and at 690 V AC to 6 kA. Operating frequency at AC-3 is 15 operations per hour maximum, which governs the duty cycle for motor starting applications. Shock resistance is 25 g for 11 ms. The auxiliary switch is transverse design and the product extension auxiliary switch is available as an option. Backwards and side clearances are 0 mm, meaning the breaker can be mounted flush against adjacent devices without derating — useful for dense panel layouts.","metaTitle":"Siemens 3RV1021-1HA38-1KT1 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1021-1HA38-1KT1 motor protection circuit breaker, 8 A continuous, Class 10 trip, 100 kA breaking at 400 V AC. Screw main terminals, spring-loaded aux. Quoted to o","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":"3 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":"42 kA","at AC at 690 V rated value":"6 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"9.25 W","Substance Prohibitance (Date)":"01.05.2012","Continuous Current Rated Value":"8 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":"3.1 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":"8 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":"5.5 ... 8 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=158261&mlfb=3RV1021-1HA38-1KT1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1021-1HA38-1KT1/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3RV1021-1HA38-1KT1?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time; the part is sourced through independent distribution channels."},{"question":"Will 3RV1021-1HA38-1KT1 drop into a panel specified around 3RV1011-1HA10?","answer":"Both are 45 mm wide SIRIUS motor protection breakers on the same DIN-rail footprint, so the mechanical fit is the same. The 3RV1021-1HA38-1KT1 carries a higher 8 A continuous rating versus the 3RV1011-1HA10, and its breaking capacity at 400 V is 100 kA versus the 3RV1011-1HA10's lower rating — verify the existing panel's SCCR and motor FLA before swapping."},{"question":"What is the depth of 3RV1021-1HA38-1KT1?","answer":"The depth is 96 mm, with a width of 45 mm and height of 97 mm."},{"question":"What conductor sizes does the main circuit accept?","answer":"The screw-type main terminals accept 2x 0.25–2.5 mm² solid conductors or 2x 24–14 AWG. The auxiliary and control circuit uses spring-loaded terminals."},{"question":"What compliance documentation is available for 3RV1021-1HA38-1KT1?","answer":"The part has a substance prohibition date of 01.05.2012, indicating RoHS compliance from that date. Standard Siemens SIRIUS documentation includes CE, UL, CSA, and IEC 60947 certifications; specific certificates are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1021-1HA38-1KT1","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/3RV1021-1HA38-1KT1 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}}