{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4HD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4HD1","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4HD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4HD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-4HD1 thermal overload relay, size S2, Class 10 trip, 22 kW at 400 V AC-3e, screw-type terminals, integrated auxiliary switch.","salesMarkdown":"## Class 10 trip and what it means for your motor The 3RU2136-4HD1 is a SIRIUS thermal overload relay — the bimetallic strip heater that sits between your contactor and the motor, watching for overcurrent. That's fast enough to protect a standard squirrel-cage induction motor during a locked-rotor event without nuisance-tripping on a normal start. The voltage ceiling matches the main contactor's rating, so you can run this on a 690 V distribution system without a separate voltage-reduction tap. ## Panel fit and terminal details Size S2 frame — 55 mm wide, 105 mm tall, 117 mm deep — mounts in any orientation on the DIN rail or directly to the panel backplate (cites:,). The normally-open contact closes when the relay trips, feeding a PLC input or alarm lamp. ## Temperature tolerance and compliance Temperature-compensated from -40 to +60 °C ambient, so the trip curve stays accurate whether the panel is in a hot mill or a cold warehouse (cites:). The substance-prohibitance declaration dates to October 15, 2014 — this relay meets RoHS and REACH requirements for that compliance window (cites:).","metaTitle":"Siemens 3RU2136-4HD1 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens 3RU2136-4HD1 SIRIUS thermal overload relay, Class 10 trip, 22 kW at 400 V AC-3e. Active production, screw terminals, size S2.","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":"3RU2136-4HD1","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","Trip Class":"CLASS 10","Rated Value":"690 V","description":"Overload relay 40... 50 A Thermal For motor protection Size S2, Class 10 Stand-alone installation Main circuit: Screw Auxiliary circuit: spring-type terminal 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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"22 kW","at 480 V rated value":"50 A","at 500 V rated value":"30 kW","at 600 V rated value":"50 A","at 690 V rated value":"45 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":"50 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","For Auxiliary And Control Circuit":"spring-loaded 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 ... 14)","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)","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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","operational current at AC-3e at 400 V rated value":"50 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":"40 ... 50 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=457777&mlfb=3RU2136-4HD1"},"ai":{"faq":[{"question":"Where can I buy the 3RU2136-4HD1 and get a price?","answer":"This relay is available through independent industrial distribution. Submit an RFQ for current pricing and lead time — availability is confirmed at quote time, not on the listing."},{"question":"What does the 'Note for message Tripped' mean on this relay?","answer":"That note labels the auxiliary contact function — the integrated switch changes state when the bimetallic strip has tripped, providing a dry-contact signal to a PLC or alarm circuit (cites:,)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4HD1","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/3RU2136-4HD1 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}}