{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-1KB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-1KB0","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-1KB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-1KB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-1KB0 thermal overload relay, Size S2, CLASS 10, 690 V rated, screw-type terminals, contactor-mount, integrated auxiliary switch.","salesMarkdown":"## CLASS 10 trip curve and motor protection The 3RU2136-1KB0: This suits standard induction motor starts where the inrush decays quickly — the relay rides through the start without nuisance tripping, but still protects against a locked-rotor condition. The thermal overload release (bimetal) tracks motor heating, not just instantaneous current. Temperature compensation from -40 to +60 °C keeps the trip curve stable across the panel ambient range. This relay mounts directly onto a Siemens SIRIUS contactor (Size S2) — no DIN rail needed for the relay itself. The 55 mm width, 90 mm height, and 105 mm depth match the contactor footprint, so the assembly occupies a single panel slot. The screwdriver spec is Pozidriv PZ2 with a 5–6 mm shaft diameter. ## Auxiliary contact ratings and trip signaling The integrated auxiliary switch provides a 'Tripped' signal — useful for feeding a PLC input or a status lamp. The 690 V rated value covers the main circuit voltage class. These lower-voltage ratings matter when the control circuit runs on a 24 VDC or 110 VAC supply — confirm the switched load stays within the curve.","metaTitle":"Siemens 3RU2136-1KB0 SIRIUS Overload Relay, CLASS 10, 690 V","metaDescription":"Siemens 3RU2136-1KB0 SIRIUS thermal overload relay, CLASS 10, 690 V rated, screw terminals, contactor-mount. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"Tripped\"","Depth":"105 mm","Width":"55 mm","title":"3RU2136-1KB0","Height":"90 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"2.5 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","at 690 V":"0.75 A","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 9...12.5 A Thermal For motor protection Size S2 Class 10 Contactor mounting Main circuit: screw terminal Auxiliary circuit: screw terminal Manual-Automatic-Reset","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":"M6","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":"5.5 kW","at 480 V rated value":"12.5 A","at 500 V rated value":"7.5 kW","at 600 V rated value":"12.5 A","at 690 V rated value":"7.5 kW","Size Of Overload Relay":"S2","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-40 ... +60 °C","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)":"09/08/2017","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"12.5 A","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 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":"415 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":"3 ... 4.5 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":"12.5 A","Size Of Contactor Can Be Combined Company-Specific":"S2","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":"7.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"9 ... 12.5 A","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"6A (SCC less than equal to 0.5 kA; U less than equal to 260V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c063c21d45bb79954523f24f487aef5c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=804445&mlfb=3RU2136-1KB0"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-1KB0","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/3RU2136-1KB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}