{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2026-2SB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2026-2SB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RB2026-2SB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2026-2SB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3-pole, CLASS 20E, screw terminals, contactor mounting, ATEX Ex II (2) GD, 1 NC auxiliary contact, 45 x 73 x 75 mm.","salesMarkdown":"The Siemens 3RB2026-2SB0-ZX95 is a SIRIUS solid-state overload relay — a three-pole device that protects motor circuits against overload and phase failure by monitoring current and tripping on a CLASS 20E curve. That CLASS 20E rating means it allows up to 20 seconds of locked-rotor current before tripping, matching the thermal characteristics of standard AC induction motors. It mounts directly onto a contactor, saving panel space, and carries ATEX Ex II (2) GD certification for use in potentially explosive atmospheres — the (2) indicates it can be installed in the safe area but protects equipment in Zone 1/21 or Zone 2/22 gas/dust environments. The auxiliary circuit provides one normally-closed contact rated for switching: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, and 0.55 A at 60 V, among other voltages — so it can directly signal a PLC input or drop out a holding circuit across common control voltages without an interposing relay. The main circuit uses screw-type terminals accepting 0.5 to 4 mm² solid or 0.5 to 2.5 mm² finely stranded with ferrules; auxiliary terminals accept 2x 0.5 to 2.5 mm² solid or 2x 0.5 to 1.5 mm² stranded. ## Ruggedness and environmental tolerance It withstands 15 g shock over 11 ms and surge voltages up to 6 kV, with EMC burst immunity at 2 kV on power ports and 1 kV on signal ports per IEC 61000-4-4 severity level 3. Mounting position is unrestricted, and the 45 x 73 x 75 mm footprint (width x height x depth) fits standard 45 mm-wide DIN-rail contactor assemblies. The 3RB2026-2SB0-ZX95 is listed as a current-production item within the SIRIUS portfolio. No official replacement has been announced; the part remains the direct fit for new builds and spares requiring a contactor-mounted solid-state overload with CLASS 20E and ATEX certification.","metaTitle":"Siemens 3RB2026-2SB0-ZX95 SIRIUS Solid-State Overload Relay,","metaDescription":"Siemens 3RB2026-2SB0-ZX95 SIRIUS solid-state overload relay, CLASS 20E trip, ATEX Ex II (2) GD, 3-pole, 1 NC aux, contactor-mount. 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","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","Per Pole":"0.02 W","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 20E","At The Side":"6 mm","During Storage":"-40 ... +80 °C","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","Product Brand Name":"SIRIUS","Type Of Protection":"PTB 06 ATEX 3001 Ex II (2) GD","Product Designation":"solid-state overload relay","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","for AWG cables for auxiliary contacts":"2x (20 ... 14)","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":"0.5 ... 2.5 mm², 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","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","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/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":"0.05 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=238413&mlfb=3RB2026-2SB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2026-2SB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does 3RB2026-2SB0-ZX95 carry?","answer":"It carries ATEX certification PTB 06 ATEX 3001 Ex II (2) GD for explosive atmospheres, and is RoHS-compliant with a substance prohibition date of 07/01/2006. EMC immunity is verified to IEC 61000-4-4 severity level 3."},{"question":"Where can I buy 3RB2026-2SB0-ZX95 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your volume and delivery requirements."},{"question":"What is the trip class and what does it mean?","answer":"It is CLASS 20E, meaning the relay allows up to 20 seconds of locked-rotor current before tripping — the standard thermal match for general-purpose AC induction motors."},{"question":"Does 3RB2026-2SB0-ZX95 mount directly on a contactor?","answer":"Yes, the fastening method is contactor mounting — it clips directly onto the matching SIRIUS contactor, saving panel space and eliminating separate wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2026-2SB0-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/3RB2026-2SB0-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}}