{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1342-4DC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1342-4DC10","canonicalUrl":"https://aoctrl.com/siemens/3RV1342-4DC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1342-4DC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for starter combinations, 3RV1342-4DC10, 25 A continuous rated current, 11 kW motor power at 400 V AC-3, 100 kA breaking capacity at 400 V, screw-type terminals, IP20 front, snap-on mounting.","salesMarkdown":"## SIRIUS 3RV1342-4DC10 — Motor Circuit Breaker for Starter Combinations It carries a continuous rated current of 25 A and is rated for 11 kW motor power at 400 V AC-3 duty, which means it directly protects a motor load of that size without an additional fuse upstream for coordination type 1 or 2, depending on the upstream breaker. Breaking capacity is 100 kA at 240 V and 400 V AC, dropping to 30 kA at 500 V and 12 kA at 690 V. At 690 V the rated voltage maximum for AC-3 operation, the device still clears 12 kA — sufficient for most industrial distribution panels where the fault current at the motor branch is typically lower than at the main bus. Terminals are screw-type with box terminals for the main circuit, accepting 2x (2.5…16 mm²) solid or 2x (10…50 mm²) stranded, with a single conductor up to 70 mm² stranded. This wire range covers standard motor feeder cables from 2.5 mm² for small motors up to 50 mm² for the 25 A rating, with headroom for parallel feeds. Auxiliary and control circuits also use screw terminals, consistent with the main circuit. Compliance documentation includes RoHS substance prohibitance dated July 1, 2006, indicating the part meets the EU RoHS directive for lead, mercury, cadmium, and other restricted substances. The part carries no ground fault or phase failure detection — it is a straight thermal-magnetic motor circuit breaker, not a multifunction electronic protector. ## Integration Notes Dimensions are 70 mm wide, 165 mm high, 174 mm deep. The 70 mm width is three 18 mm module spaces on a DIN rail, matching the footprint of a standard 3-pole motor circuit breaker. The 174 mm depth includes the screw terminals and any protruding conductors — ensure 200 mm clearance in front of the rail for wiring access. Power dissipation is 21 W total in hot operating state, or 7 W per pole. Operating frequency is limited to 15 switching operations per hour at AC-3 maximum. This is typical for a motor circuit breaker — it is not designed for frequent switching like a contactor. For applications requiring more than 15 starts per hour, use a contactor for the switching duty and the breaker only for protection. Shock resistance is 25g for 11 ms, adequate for most industrial environments including conveyor systems and machine tools.","metaTitle":"Siemens 3RV1342-4DC10 SIRIUS Circuit Breaker, 25 A, 11 kW at","metaDescription":"Siemens 3RV1342-4DC10 SIRIUS circuit breaker for starter combinations. 25 A continuous, 11 kW at 400 V AC-3, 100 kA breaking capacity at 400 V. Screw terminals, IP20 front. Active","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":"11 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":"30 kA","at AC at 690 V rated value":"12 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"21 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"25 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":"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":"25 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=137012&mlfb=3RV1342-4DC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1342-4DC10/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV1342-4DC10 at 400 V?","answer":"The breaking capacity is 100 kA at 400 V AC, which is the highest rating in its class and allows installation downstream of high-fault transformers without additional fusing."},{"question":"What wire sizes does 3RV1342-4DC10 accept?","answer":"Main circuit screw terminals accept 2x (2.5…16 mm²) solid or 2x (10…50 mm²) stranded, with a single conductor up to 70 mm² stranded. Auxiliary terminals are also screw type."},{"question":"Where can I buy 3RV1342-4DC10 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1342-4DC10","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/3RV1342-4DC10 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}}