{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3026-2QB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3026-2QB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RB3026-2QB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2QB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB3026-2QB0-ZX95, CLASS 20E, rated thermal current 25 A, Size S0, contactor mounting.","salesMarkdown":"The Siemens 3RB3026-2QB0-ZX95 is a SIRIUS solid-state overload relay — no bimetal strip to drift, no heater packs to swap. It protects a motor branch against overload and phase-loss by monitoring current electronically and opening a signaling contact when it trips. That's the standard for standard-duty induction motors driving pumps, fans, or compressors — it lets the motor ride through starting inrush without nuisance tripping, but still clears a locked-rotor fast enough to avoid winding damage. Rated thermal current Ith is 25 A at 480 V and also at 600 V, so the relay's current-sensing path is rated for the full 25 A continuous regardless of whether the line is 480 V or 600 V. The maximum operating voltage is 690 V, which covers 480 V, 600 V, and 690 V nominal systems. The auxiliary contact is integrated and rated for switching: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.3 A at 125 V — plenty for a PLC digital input or a contactor coil. The note \"for message 'tripped'\" on the listing refers to the signaling contact position that closes when the relay has operated. Size S0 and contactor-mount fastening mean this relay bolts directly onto the bottom of a SIRIUS contactor of matching frame size — no DIN rail needed for the overload itself, though the contactor may be rail-mounted. The relay sits in any mounting position, which simplifies panel layout when space is tight. Dimensions are 45 mm wide, 87 mm high, 84 mm deep — the width matches a single S0 contactor width, so the contactor-plus-overload stack occupies one 45 mm column. Screw-type terminals on the main circuit accept solid 1x (0.5 to 4 mm²) or stranded 2x 10 mm², with a Pozidriv PZ 2 screwdriver tip specified. Storage and transport range is -40 to +80 °C. Shock resistance is 15g / 11 ms, and vibration resistance covers 1-6 Hz at 15 mm amplitude and 6-500 Hz at 20 m/s² for 10 cycles — robust enough for machine-mounted installations.","metaTitle":"Siemens 3RB3026-2QB0-ZX95 SIRIUS solid-state overload relay","metaDescription":"Siemens SIRIUS 3RB3026-2QB0-ZX95 solid-state overload relay, CLASS 20E, rated 25 A thermal current. Size S0, contactor-mount. Sourced to order against RFQ.","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":"0.4 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":"25 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":"25 A","at 600 V rated value":"25 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":"25 A","for AC motors at 500 V at 50 Hz":"4 ... 15 kW","for AC motors at 690 V at 50 Hz":"5.5 ... 22 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: 63 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, RK5: 100 A","for 3-phase motors at 400 V at 50 Hz":"3 ... 11 kW","Of The Auxiliary And Control Contacts":"M3","for AWG cables for auxiliary contacts":"1x (20 ... 14), 2x (20 ... 14)","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":"25 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":"1.2 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"6 ... 25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a6c39a8cdbe11adb082f9962d82ee424.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=364908&mlfb=3RB3026-2QB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB3026-2QB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Is the 3RB3026-2QB0-ZX95 compatible with Siemens SIRIUS 3RT2 contactors?","answer":"Yes. The relay uses contactor mounting (Size S0) and is designed to bolt directly onto SIRIUS 3RT2 contactors of matching frame size."},{"question":"Where can I buy Siemens 3RB3026-2QB0-ZX95 available via RFQ confirmation?","answer":"This part is sourced to order against a request for quote. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3026-2QB0-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/3RB3026-2QB0-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}}