{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3026-1PE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3026-1PE0","canonicalUrl":"https://aoctrl.com/siemens/3RB3026-1PE0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3026-1PE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB3026-1PE0, 4 A thermal current, 690 V rated, CLASS 10E, S0 size, contactor mounting, spring-loaded terminals.","salesMarkdown":"The Siemens 3RB3026-1PE0 is a SIRIUS solid-state overload relay — an electronic overload protection device for motor circuits, designed to mount directly onto a contactor (contactor mounting). It is rated for a thermal current of 4 A and a rated insulation voltage of 690 V, with a CLASS 10E trip class, meaning it will trip within 10 seconds at 7.2× the current setting, protecting motors against sustained overloads without nuisance tripping on startup inrush. The 4 A thermal current (Ith) is the continuous current the relay can carry under normal conditions — this is the rating you match to the motor FLA. The 690 V rated value covers most low-voltage motor circuits up to 600 V class. The CLASS 10E trip curve is standard for standard-start induction motors; it allows the motor to accelerate without tripping but still protects against locked-rotor or sustained overload. The S0 frame size is compact: 45 mm wide, 109 mm high, 85 mm deep. It mounts directly onto a contactor (contactor mounting), saving DIN-rail space in a panel. The spring-loaded terminals accept 2× (0.25–1.5 mm²) solid or stranded wire, or a single 10 mm² stranded — enough for the 4 A circuit without needing ferrules for smaller gauges. The auxiliary switch is integrated (design of the auxiliary switch: integrated) and provides a signal contact rated for 4 A at 120 V, 3 A at 230 V, 2 A at 24 V — enough to drive a PLC input or indicator lamp. The note for message \"tripped\" indicates the auxiliary contact position when the relay has tripped. This relay is sized for motor control centers and individual motor starters in the SIRIUS system. It clips onto a SIRIUS contactor (contactor mounting) — no separate DIN-rail footprint needed. Vibration resistance is 1–6 Hz at 15 mm amplitude, 6–500 Hz at 20 m/s² for 10 cycles; shock resistance is 15g for 11 ms on the main body, 9g for 11 ms on the signaling contact in tripped position — robust enough for most industrial environments. Storage and transport range is -40 to +80 °C.","metaTitle":"Siemens 3RB3026-1PE0 SIRIUS Solid-State Overload Relay, 4 A,","metaDescription":"Siemens 3RB3026-1PE0 SIRIUS solid-state overload relay, 4 A thermal current, 690 V rated, CLASS 10E trip. S0 size, contactor mounting. 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":"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":"0.03 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 10E","Rated Value":"690 V","During Storage":"-40 ... +80 °C","Thermal Current":"4 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":"4 A","at 600 V rated value":"4 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":"4 A","for AC motors at 500 V at 50 Hz":"0.37 ... 2.2 kW","for AC motors at 690 V at 50 Hz":"0.55 ... 3 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: 20 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gG: 35 A, RK5: 15 A","at AWG cables for auxiliary contacts":"1x (24 ... 16), 2x (24 ... 16)","for 3-phase motors at 400 V at 50 Hz":"0.37 ... 1.5 kW","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":"4 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":"0.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"1 ... 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ed0ba2d6730f8a06915f3addafeb06ee.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=4032&mlfb=3RB3026-1PE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB3026-1PE0/alternatives.json"},"ai":{"faq":[{"question":"What does the note 'for message tripped' mean?","answer":"It indicates that the integrated auxiliary switch changes state when the overload relay has tripped, providing a signal (e.g., to a PLC or indicator) that the relay is in the tripped position."},{"question":"What wire sizes does the spring-loaded terminal accept?","answer":"It accepts 2× (0.25–1.5 mm²) solid or stranded, or a single 10 mm² stranded conductor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3026-1PE0","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/3RB3026-1PE0 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}}