{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1042-4FA10-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1042-4FA10-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1042-4FA10-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4FA10-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, size S3, Class 10 thermal overload, 28…40 A adjustable release, 520 A short-circuit trip, screw terminals, increased switching capacity.","salesMarkdown":"## Sourcing & lifecycle — phased out, successor identified The 3RV1042-4FA10-ZX95 is a phased-out product from the Siemens SIRIUS 3RV1 generation. The official successor is the SIRIUS 3RV2 series, which carries the same S3 frame size and screw-terminal footprint, making a panel swap straightforward without rewiring the main power circuit. The 28…40 A thermal overload release is Class 10 — it trips within 10 seconds at 7.2× the set current, matching the startup profile of standard AC induction motors. The 520 A fixed short-circuit release provides magnetic trip for fault currents above that threshold, protecting the downstream contactor and cable. The 23 W total power dissipation (7.7 W per pole) at hot operating state means the panel designer should account for that heat load when spacing adjacent devices, especially in a sealed enclosure. Typical deployment is on a DIN-rail-mounted motor feeder in a control panel, protecting a pump, fan, or conveyor motor. The increased switching capacity variant handles higher fault currents than the standard S3 breaker, which matters when coordinating with upstream fuses or a molded-case breaker for selectivity. ## Compliance documentation The part carries a Substance Prohibitance date of 07/01/2006, indicating RoHS compliance for the European market from that date. As a Siemens SIRIUS product, it is designed to meet IEC 60947-2 and IEC 60947-4-1 standards for circuit breakers and motor starters; UL/CSA listings are typical for the series but should be verified against the specific variant's markings.","metaTitle":"Siemens 3RV1042-4FA10-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1042-4FA10-ZX95 motor protection circuit breaker, Class 10, 28-40 A thermal setting, 520 A short-circuit release. Phased out; successor is 3RV2 series. Sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"lifecycle_stage":"current","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","Design Of The Product":"for motor protection","at AC in hot operating state":"23 W","Substance Prohibitance (Date)":"07/01/2006","at AC in hot operating state per pole":"7.7 W"}},"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=807386&mlfb=3RV1042-4FA10-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1042-4FA10-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1042-4FA10-ZX95 and get a price?","answer":"This part is sourced through independent distribution channels. Submit an RFQ for current availability and pricing; quotes are confirmed at the time of request."},{"question":"Will 3RV1042-4FA10-ZX95 drop into a panel designed for 3RV6011-0CA10?","answer":"No. The 3RV6011-0CA10 is a size S00 breaker with a 45 mm width and 0.18-0.25 A range, while the 3RV1042-4FA10-ZX95 is a size S3 breaker for 28-40 A. The frame sizes, mounting holes, and busbar connections are completely different; rewiring and a larger DIN-rail footprint are required."},{"question":"What compliance documentation does this part carry?","answer":"The Substance Prohibitance date of 07/01/2006 confirms RoHS compliance. As a Siemens SIRIUS product, it is designed to IEC 60947-2 and IEC 60947-4-1; UL/CSA listings are typical but should be verified on the specific unit's nameplate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1042-4FA10-ZX95","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/3RV1042-4FA10-ZX95 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}}