{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3026-2SE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3026-2SE0","canonicalUrl":"https://aoctrl.com/siemens/3RB3026-2SE0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2SE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB3026-2SE0 solid-state overload relay, CLASS 20E, 12 A thermal current, 690 V rated, S0 size, contactor mounting, spring-loaded terminals.","salesMarkdown":"The Siemens 3RB3026-2SE0 is a SIRIUS solid-state overload relay in the S0 size, designed to protect motors against overload and phase imbalance. It mounts directly onto a contactor, saving DIN-rail space in the panel. Rated for CLASS 20E trip class, it allows a motor to draw starting current for up to 20 seconds before tripping — the standard choice for normal-starting loads like pumps and fans. The 12 A thermal current (Ith) is the continuous current the relay can carry without tripping — match this to the motor full-load current (FLA) on the nameplate. The auxiliary signaling contact is integrated and rated for switching: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V — enough to drive a PLC input or a small indicator lamp directly. The relay is marked for message \"tripped\" on the signaling contact (97/98), so the panel wiring can distinguish a trip condition from a healthy state. Shock resistance is 15g / 11 ms per IEC 60068-2-27, with the signaling contact derated to 9g / 11 ms in the tripped position — robust enough for most industrial environments. The S0 size measures 45 mm wide, 109 mm high, 85 mm deep — fits the standard contactor footprint. The screwdriver tip needed is Pozidriv PZ2 with a shaft diameter of 5 to 6 mm. Vibration resistance is 1-6 Hz at 15 mm amplitude, 6-500 Hz at 20 m/s² for 10 cycles — stable on a machine frame.","metaTitle":"Siemens 3RB3026-2SE0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB3026-2SE0 SIRIUS solid-state overload relay, CLASS 20E, 12 A thermal current, 690 V rated. S0 size, contactor mounting. Current production. RFQ for BOM line.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"85 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"45 mm","Height":"109 mm","at 24 V":"2 A","at 60 V":"0.55 A","Per Pole":"0.2 W","Stranded":"1x 10 mm²","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","Trip Class":"CLASS 20E","Rated Value":"690 V","During Storage":"-40 ... +80 °C","Thermal Current":"12 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","Mounting Position":"any","Solid Or Stranded":"2x (0,25 ... 1,5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"solid-state overload relay","Vibration Resistance":"1-6 Hz, 15 mm; 6-500 Hz, 20 m/s²; 10 cycles","at 480 V rated value":"12 A","at 600 V rated value":"12 A","Size Of Overload Relay":"S0","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-25 ... +60 °C","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","according to IEC 60068-2-27":"15g / 11 ms; Signaling contact 97 / 98 in position \"Tripped\": 9g / 11 ms","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"12 A","for AC motors at 500 V at 50 Hz":"1.5 ... 5.5 kW","for AC motors at 690 V at 50 Hz":"2.2 ... 7.5 kW","For Auxiliary And Control Circuit":"spring-loaded terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 50 A, J: 45 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gG: 63 A, RK5: 45 A","for 3-phase motors at 400 V at 50 Hz":"1.5 ... 5.5 kW","for AWG cables for auxiliary contacts":"1x (24 ... 16), 2x (24 ... 16)","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","operational current at AC-3e at 400 V rated value":"12 A","Size Of Contactor Can Be Combined Company-Specific":"S0","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"No","contact rating of auxiliary contacts according to UL":"B600 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 6 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","power loss [W] for rated value of the current at AC in hot operating state":"0.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3 ... 12 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=446468&mlfb=3RB3026-2SE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2SE0/alternatives.json"},"ai":{"faq":[{"question":"What does the note \"for message tripped\" mean?","answer":"It means the signaling contact (97/98) is wired to indicate a tripped condition — useful for a PLC input or alarm circuit to distinguish overload from normal operation."},{"question":"What are the key ratings for this overload relay?","answer":"CLASS 20E trip class, 12 A thermal current, 690 V rated insulation voltage. Auxiliary contact ratings: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3026-2SE0","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/3RB3026-2SE0 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}}