{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3026-2VB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3026-2VB0","canonicalUrl":"https://aoctrl.com/siemens/3RB3026-2VB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2VB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, solid-state overload relay, size S0, 32 A thermal current, CLASS 20E, screw-type terminals, 45 x 87 x 84 mm.","salesMarkdown":"It's the component that sits between your contactor and motor, watching for overcurrent conditions and tripping on a CLASS 20E curve — that means it allows a 20-second overload at 7.2× the current setting before it opens, which is the standard match for standard-duty induction motors starting under load. The integrated auxiliary switch gives you a separate signaling contact (Note: for message \"tripped\") so the PLC or annunciator knows exactly when the relay has operated. ## Mounting and wiring reality This relay mounts directly onto the contactor — no DIN rail needed, no extra bracket. Fastening method is contactor mounting, so it clips onto the matching SIRIUS contactor and the power connections pass through. The main circuit uses screw-type terminals accepting 1x (0.5...4 mm²) solid or 2x (0.5...2.5 mm²) stranded, and the main contacts take M4 screws. For the power wiring, stranded 2x 10 mm² is also listed. The auxiliary contact terminals use a smaller Pozidriv PZ 2 screwdriver tip. Overall dimensions: 45 mm wide, 87 mm high, 84 mm deep — it's a compact S0 footprint that fits into standard panel layouts without surprises. The 32 A thermal current is the continuous current the relay can carry without tripping — that's the number you match to your motor's full-load amps. The CLASS 20E trip class means the relay won't nuisance-trip on a normal motor start but will clear a sustained overload before the motor insulation takes damage. The auxiliary contact ratings tell you what the signaling circuit can handle: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V — all AC values for the \"tripped\" signal contact. Shock resistance of 15g / 11 ms and vibration resistance per IEC 60068-2-27 mean it survives the typical bumps of a running machine.","metaTitle":"Siemens 3RB3026-2VB0 SIRIUS Solid-State Overload Relay, CLAS","metaDescription":"Siemens SIRIUS 3RB3026-2VB0 solid-state overload relay, size S0, 32 A thermal current, CLASS 20E trip class. Contactor-mount, screw terminals. Current production. Available to orde","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"84 mm","Solid":"1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)","Width":"45 mm","Height":"87 mm","at 24 V":"2 A","at 60 V":"0.55 A","Per Pole":"1 W","Stranded":"2x 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":"32 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"1x (0,5 ... 4 mm²), 2x (0,5 ... 2,5 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":"32 A","at 600 V rated value":"32 A","Size Of Overload Relay":"S0","For Main Current Circuit":"screw-type 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":"40 A","for AC motors at 500 V at 50 Hz":"7.5 ... 22 kW","for AC motors at 690 V at 50 Hz":"11 ... 37 kW","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 80 A, J: 100 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gG: 125 A, J: 150 A","at AWG cables for auxiliary contacts":"1x (20 ... 14), 2x (20 ... 14)","for 3-phase motors at 400 V at 50 Hz":"5.5 ... 18.5 kW","Of The Auxiliary And Control Contacts":"M3","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":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","operational current at AC-3e at 400 V rated value":"32 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":"3 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"10 ... 40 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=402550&mlfb=3RB3026-2VB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2VB0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RB3026-2VB0's trip class and what does it mean?","answer":"It is CLASS 20E, meaning the relay allows a 20-second overload at 7.2× the current setting before tripping — standard for normal motor starts."},{"question":"What is the auxiliary contact rating for the tripped signal?","answer":"The integrated auxiliary switch is rated 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V AC."},{"question":"Where can I buy 3RB3026-2VB0 and what is the lead time?","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/3RB3026-2VB0","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/3RB3026-2VB0 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}}