{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4FB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4FB1","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4FB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4FB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-4FB1 thermal overload relay, S2 frame size, CLASS 10 trip class, 18.5 kW at 400 V, 37 kW at 690 V, screw-type terminals, integrated auxiliary switch with message 'Tripped'.","salesMarkdown":"## CLASS 10 trip coordination The 3RU2136-4FB1: This sets the coordination window with the upstream MCCB — a Type 1 or Type 2 coordination study needs this number to verify the breaker clears before the relay damage curve is exceeded. The relay's thermal memory prevents immediate restart after a trip, protecting the motor winding from repeated locked-rotor events. ## S2 frame mounting and wiring S2 frame size, 117 mm depth, 55 mm width, 105 mm height — mounts standalone on the panel backplate or directly to the matching SIRIUS contactor. Any mounting position is allowed, and temperature compensation is active from -40 °C to +60 °C, so the trip accuracy holds regardless of orientation or ambient conditions inside the enclosure. ## Auxiliary contact and signalling This contact signals the PLC or HMI that the relay has operated, so the control logic can sequence a restart or trigger an alarm without waiting for a manual reset. The relay is RoHS compliant per the substance prohibitance date of 10/15/2014. Power dissipation is 5.2 W per pole at rated current — account for this in the enclosure thermal budget, especially in a multi-relay panel with restricted airflow.","metaTitle":"Siemens 3RU2136-4FB1 SIRIUS Overload Relay, CLASS 10","metaDescription":"Siemens 3RU2136-4FB1 SIRIUS thermal overload relay, S2 frame, CLASS 10 trip, 18.5 kW at 400 V. 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":"117 mm","Width":"55 mm","title":"3RU2136-4FB1","Height":"105 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"5.2 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 28...40 A Thermal For motor protection Size S2, Class 10 Stand-alone installation Main circuit: Screw Auxiliary circuit: Screw Manual-Automatic-Reset","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"stand-alone installation","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":"18.5 kW","at 480 V rated value":"40 A","at 500 V rated value":"22 kW","at 600 V rated value":"40 A","at 690 V rated value":"37 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)":"10/15/2014","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 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":"40 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":"15.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"28 ... 40 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":"$59.69","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=288113&mlfb=3RU2136-4FB1"},"ai":{"faq":[{"question":"What motor power does 3RU2136-4FB1 cover at 400 V?","answer":"Rated for 18.5 kW at 400 V and 37 kW at 690 V, making it suitable for standard European motor sizes in those voltage tiers."},{"question":"What does the 'Tripped' message contact do on 3RU2136-4FB1?","answer":"The integrated auxiliary switch provides a 'Tripped' signal contact rated 2 A at 24 V, 3 A at 120 V, and 2 A at 230 V. It closes when the relay operates, giving the PLC or HMI a discrete input that the overload has tripped."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4FB1","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/3RU2136-4FB1 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}}