{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2142-4JA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2142-4JA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2142-4JA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2142-4JA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV2142-4JA10, with overload relay function, Trip Class 10, 50 kA at 400 V, screw-type terminals, DIN rail mount.","salesMarkdown":"## What it is and where it fits The Siemens 3RV2142-4JA10 is a SIRIUS motor protection circuit breaker with an integrated overload relay function, designed to protect motors against short circuits, overloads, and phase failure. It snaps onto 35 mm DIN rail per DIN EN 60715 and uses screw-type terminals for the main circuit, so it lands in a standard motor control center or panel without surprises. Rated breaking capacity hits 50 kA at 400 V, which is enough to handle a stiff utility fault without cascading upstream. The Trip Class 10 means it trips fast enough to protect standard induction motors during a locked-rotor event — out here in the grease, that's the difference between a quick restart and a rewind job. ## Key ratings and what they mean for your panel At 400 V, the 50 kA interrupting rating covers most industrial secondary-side faults. At 690 V, it still holds 4 kA — enough for a 690 V motor branch in a European-style panel. The unit also carries a 63 A continuous rating at 480 V and 600 V, so it sizes into the 40–60 A motor range comfortably. Phase failure detection is built in — the unit will drop the motor on a lost phase before single-phasing cooks the winding. No ground fault detection on this variant, so if you need that, you'd add a separate ground-fault module downstream. Mounting position is any, which helps when you're squeezing this into a tight corner of the enclosure. Clearance requirements: 150 mm above and below, 30 mm to the side, and zero forward or backward — so it can sit flush against the backplane. ## Lifecycle and sourcing reality Sourcing is straightforward — we quote this part to order against an RFQ through our independent distribution channels. Availability and current pricing are confirmed at quote time. No long lead-time surprises on an active-line item like this.","metaTitle":"Siemens 3RV2142-4JA10 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2142-4JA10 SIRIUS motor protection circuit breaker with overload relay function. Trip Class 10, 50 kA breaking capacity at 400 V. Current lifecycle stage. Quoted to orde","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Note":"1","Depth":"176 mm","Solid":"2x (2.5 ... 16 mm²)","Width":"90 mm","Height":"165 mm","Upwards":"150 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"150 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","Mounting Position":"any","Solid Or Stranded":"2x (2,5 ... 50 mm²), 1x (10 ... 70 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"15 hp","at 240 V rated value":"100 kA","at 400 V rated value":"50 kA","at 480 V rated value":"63 A","at 500 V rated value":"7.5 kA","at 600 V rated value":"63 A","at 690 V rated value":"4 kA","Design Of The Product":"For motor protection with overload relay function","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"5 hp","at 200/208 V rated value":"20 hp","at 220/230 V rated value":"25 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"60 hp","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":"15 kA","at AC at 690 V rated value":"7.5 kA","Size Of The Circuit-Breaker":"S3","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"25 000","at AC in hot operating state":"34 W","at AC-3 at 400 V rated value":"63 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"25 000","Substance Prohibitance (Date)":"03/01/2017","at AC-3e at 400 V rated value":"63 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"63 A","Design Of The Short-Circuit Trip":"magnetic","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","For Main Contacts For Ring Cable Lug":"4.5 ... 6 N·m","Surge Voltage Resistance Rated Value":"8 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Of The Auxiliary And Control Contacts":"M3","at AC in hot operating state per pole":"11.3 W","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 %","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","For Main Contacts With Screw-Type Terminals":"4.5 ... 6 N·m","with high demand rate according to SN 31920":"50 %","shock resistance according to IEC 60068-2-27":"25g / 11 ms Sinus","Electrical Endurance (Operating Cycles) Typical":"25 000","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","Size Of Contactor Can Be Combined Company-Specific":"S3","Outer Diameter Of The Usable Ring Cable Lug Maximum":"19 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"819 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"45 ... 63 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=629988&mlfb=3RV2142-4JA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2142-4JA10/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2142-4JA10 at 400 V?","answer":"The rated breaking capacity at 400 V is 50 kA. At 690 V it drops to 4 kA."},{"question":"What is the trip class of this motor protection circuit breaker?","answer":"It is Trip Class 10, which means it will trip within 10 seconds at a locked-rotor current of 7.2× the thermal setting — standard protection for most general-purpose motors."},{"question":"Where can I buy 3RV2142-4JA10 and what is the price?","answer":"This part is sourced to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2142-4JA10","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/3RV2142-4JA10 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}}