{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2025-1RB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2025-1RB0","canonicalUrl":"https://aoctrl.com/siemens/3RB2025-1RB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2025-1RB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2025-1RB0, CLASS 10E trip class, contactor mounting, 45 mm wide, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2025-1RB0 is a SIRIUS solid-state overload relay — CLASS 10E trip curve, designed to bolt directly onto a contactor (contactor mounting). It protects motors against overload and phase-loss by monitoring current through the main circuit and tripping the contactor coil when the thermal model exceeds the class threshold. The 45 mm width keeps it tight on the DIN rail, and the ATEX Ex II (2) GD marking (PTB 06 ATEX 3001) qualifies it for use in potentially explosive gas or dust atmospheres — so it's not just a general-purpose relay; it's certified for Zone 1/21 and Zone 2/22 applications where a standard thermal overload would be out of compliance. The main circuit terminals accept 0.5 to 4 mm² solid or 2x (0.5 to 2.5 mm²) stranded, which covers most motor leads up to about 2.5 kW at 400 V. Pollution degree 3 rated voltage of 690 V means it's rated for industrial environments with conductive pollution (dust, moisture) up to 690 V phase-to-phase — that's the standard for 400 V and 480 V systems with a solidly grounded neutral. ## Deployment context Mounts directly onto a contactor (contactor mounting) — no separate DIN-rail footprint needed, which saves panel width.","metaTitle":"Siemens 3RB2025-1RB0 SIRIUS Solid-State Overload Relay, CLAS","metaDescription":"Siemens 3RB2025-1RB0 SIRIUS solid-state overload relay, CLASS 10E trip, ATEX Ex II (2) GD, contactor-mount, 45 mm wide. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"75 mm","Solid":"0.5 ... 4 mm², 2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"73 mm","Maximum":"2 000 m","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","at 110 V":"0.3 A","at 120 V":"4 A","at 125 V":"0.3 A","at 220 V":"0.11 A","at 230 V":"3 A","Backwards":"0 mm","Downwards":"0 mm","Trip class":"CLASS 10E","At The Side":"6 mm","On The Front":"IP20","Mounting type":"Contactor mounting","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Shock resistance":"15g / 11 ms","Mounting position":"any","Product brand name":"SIRIUS","Type of protection":"PTB 06 ATEX 3001 Ex II (2) GD","Product designation":"solid-state overload relay","For Auxiliary Contacts":"0","For Main Current Circuit":"screw-type terminals","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"0.05 W","Relative humidity during operation":"100 %","due to burst acc. to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","at AWG conductors for main contacts":"2x (14 ... 10)","Surge voltage resistance rated value":"6 kV","Reference code acc. to DIN EN 81346-2":"F","at AC in hot operating state per pole":"0.02 W","With Degree Of Pollution 3 Rated Value":"690 V","Finely Stranded With Core End Processing":"0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 14)","For Auxiliary And Control Current Circuit":"screw-type terminals","Number of NC contacts for auxiliary contacts":"1","Number of NO contacts for auxiliary contacts":"1","Electrostatic discharge acc. to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Size of contactor can be combined company-specific":"S0","due to conductor-earth surge acc. to IEC 61000-4-5":"2 kV (line to earth) corresponds to degree of severity 3","Removable Terminal For Auxiliary And Control Circuit":"Yes","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 6 A","Adjustable pick-up value current of the current-dependent overload release":"0.1 ... 0.4 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=25748&mlfb=3RB2025-1RB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2025-1RB0/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RB2025-1RB0 and how is it quoted for volume purchases?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for volume pricing."},{"question":"What compliance documentation does Siemens provide for 3RB2025-1RB0?","answer":"The relay carries ATEX Ex II (2) GD certification (PTB 06 ATEX 3001), IEC 61000-4-4 burst immunity at severity 3, and pollution degree 3 rated voltage of 690 V. Standard Siemens documentation includes a CE declaration and the ATEX certificate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2025-1RB0","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/3RB2025-1RB0 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}}