{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2126-4AB0-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2126-4AB0-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RU2126-4AB0-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2126-4AB0-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU2126-4AB0-ZW96, size S0, Class 10, 690 V rated value, with integrated auxiliary switch and screw-type terminals, for message \"Tripped\".","salesMarkdown":"## What this relay does The Siemens 3RU2126-4AB0-ZW96 is a SIRIUS thermal overload relay — size S0, Class 10 trip curve — that protects motor circuits by monitoring current and opening the contactor on overload. The \"for message \\\"Tripped\\\"\" variant means the integrated auxiliary switch signals a trip condition directly to a PLC or indicator lamp, which saves a panel builder from wiring an extra block. Rated value is 690 V, with power ratings of 7.5 kW at 400 V and 500 V, and 11 kW at 690 V. The auxiliary contact carries 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V — enough to drive a small relay or input card directly. Mounts directly to the contactor — no DIN rail needed for the relay itself, though the contactor typically clips onto one. Size S0 footprint (45 mm wide, 85 mm deep, 85 mm tall) is the standard for this frame class. Screw terminals accept 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²) solid or stranded wire; use a PZ2 Pozidriv bit with a 5–6 mm shaft diameter. Temperature compensation is active from -40 to +60 °C, and the relay operates from -40 to +70 °C.","metaTitle":"Siemens 3RU2126-4AB0-ZW96 SIRIUS Thermal Overload Relay, Cla","metaDescription":"Siemens SIRIUS 3RU2126-4AB0-ZW96 thermal overload relay, Class 10, size S0, 690 V rated value, with integrated auxiliary switch and trip indication. 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","Width":"45 mm","Height":"85 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"2.7 W","at 110 V":"0.22 A","at 120 V":"3 A","at 125 V":"0.22 A","at 220 V":"0.11 A","at 230 V":"2 A","at 400 V":"1 A","Trip Class":"CLASS 10","Rated Value":"690 V","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"7.5 kW","at 480 V rated value":"16 A","at 500 V rated value":"7.5 kW","at 600 V rated value":"16 A","at 690 V rated value":"11 kW","Size Of Overload Relay":"S0","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-40 ... +60 °C","MTTF with high demand rate":"2 280 y","Design Of Screwdriver Shaft":"Diameter 5 ... 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","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":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"16 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"440 V","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Of The Auxiliary And Control Contacts":"M3","Between Auxiliary And Auxiliary Circuit":"440 V","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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","shock resistance according to IEC 60068-2-27":"8g / 11 ms","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","operational current at AC-3e at 400 V rated value":"16 A","Size Of Contactor Can Be Combined Company-Specific":"S0","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, quick: 10 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","power loss [W] for rated value of the current at AC in hot operating state":"8.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"11 ... 16 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/26b023cde52050e9bf143861baebd661.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1042962&mlfb=3RU2126-4AB0-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2126-4AB0-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the note \"for message Tripped\" on this relay?","answer":"The note indicates the integrated auxiliary switch is configured to signal a trip condition — it changes state when the overload relay trips, giving a direct digital signal to a controller or indicator."},{"question":"Will 3RU2126-4AB0-ZW96 drop into a panel specified around 3RU2116-1FC1?","answer":"Both are SIRIUS size S0 thermal overload relays with the same mounting pattern, so the 3RU2126-4AB0-ZW96 will physically fit the same contactor footprint. Verify the current setting range matches your motor FLA before swapping — the 3RU2116-1FC1 covers a different adjustment window."},{"question":"Where can I buy 3RU2126-4AB0-ZW96 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 a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2126-4AB0-ZW96","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/3RU2126-4AB0-ZW96 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}}