{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1342-4LC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1342-4LC10","canonicalUrl":"https://aoctrl.com/siemens/3RV1342-4LC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1342-4LC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for starter combinations, 3RV1342-4LC10, 90 A continuous current, 45 kW at 400 V AC-3, 100 kA breaking capacity at 400 V, 3-pole, screw terminals, DIN rail mount.","salesMarkdown":"Its 90 A continuous current rating and 45 kW at 400 V AC-3 rating tell you it handles a 45 kW 400 V motor load in standard starting duty, with a switching frequency up to 15 operations per hour. Zero clearance required backwards or at the sides — you can pack breakers tight in a row without derating for air gaps. The 70 mm width, 165 mm height, and 174 mm depth fit a standard motor starter footprint; the any mounting position spec means vertical or horizontal rail orientation works. Screw-type box terminals on the main circuit accept solid 2x (2.5 to 16 mm²) or stranded 2x (10 to 50 mm²) and 1x (10 to 70 mm²), with AWG equivalents of 2x (10 to 1) and 1x (10 to 2). The auxiliary and control circuit uses separate screw terminals, and the product extension allows an auxiliary switch to be added. ## Protection and electrical ratings Rated voltage is 690 V, with AC-3 switching capability up to that same maximum. Breaking capacity falls with voltage: 100 kA at 240 V and 400 V, then 10 kA at 500 V, and 6 kA at 690 V. Surge voltage resistance is 6000 V, and touch protection is finger-safe (IP20 on the front). No ground fault or phase failure detection built in — this is a basic motor circuit protector, not a full electronic trip unit. Power loss in hot operating state is 38 W total, 12.7 W per pole.","metaTitle":"Siemens 3RV1342-4LC10 SIRIUS Circuit Breaker, 90 A, 45 kW at","metaDescription":"Siemens 3RV1342-4LC10 SIRIUS circuit breaker for starter combinations. 90 A continuous, 45 kW at 400 V, 100 kA breaking capacity. DIN rail mount, IP20 front. Active production. Quo","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"174 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"70 mm","Height":"165 mm","Stranded":"2x (10 ... 50 mm²), 1x (10 ... 70 mm²)","Backwards":"0 mm","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":"45 kW","Design Of The Product":"for starter combinations","Ground Fault Detection":"No","Phase Failure Detection":"No","For Main Current Circuit":"screw-type terminals with box 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":"10 kA","at AC at 690 V rated value":"6 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"38 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"90 A","at AWG cables for main contacts":"2x (10 ... 1), 1x (10 ... 2)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AC in hot operating state per pole":"12.7 W","Finely Stranded With Core End Processing":"2x (2.5 ... 35 mm²), 2.5 ... 50 mm²","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"90 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"magnetic","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":"50 000"}},"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=483128&mlfb=3RV1342-4LC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1342-4LC10/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV1342-4LC10's listed depth (174 mm) on this component line?","answer":"The depth is 174 mm, with a width of 70 mm and height of 165 mm."},{"question":"Will 3RV1342-4LC10 drop into a panel that was specified around 3RV6021-4DA10 without rewiring?","answer":"Both use the same 35 mm DIN rail mounting standard with zero side and backwards clearance, so the mechanical fit is identical. However, verify terminal wire ranges — the 3RV1342-4LC10 accepts solid 2x (2.5 to 16 mm²) and stranded 2x (10 to 50 mm²) — against your existing wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1342-4LC10","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/3RV1342-4LC10 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}}