{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4KD1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4KD1","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4KD1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4KD1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-4KD1 thermal overload relay, Size S2, Trip Class 10A, rated 690 V, 55 mm width, 105 mm height, 117 mm depth.","salesMarkdown":"The Siemens 3RU2136-4KD1 is a SIRIUS-brand thermal overload relay in Size S2, designed to protect motors against overload and phase failure. The thermal bimetallic release compensates for ambient temperature changes across -40 to +60 °C, so the trip curve stays accurate whether the panel sits in a cold warehouse or a warm machine bay. Rated for a maximum of 690 V, the relay carries motor power ratings of 37 kW at 400 V, 45 kW at 500 V, and 55 kW at 690 V. The auxiliary contact block is integrated and provides signal ratings across multiple control voltages: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. These are the values to check against your PLC input card or control relay coil draw — the 24 VDC rating at 2 A is sufficient for most digital inputs, but verify the inrush if driving a contactor coil directly. This relay mounts in stand-alone installation — no DIN rail adapter required, though it can be snapped onto a 35 mm rail via the SIRIUS S2 base. Dimensions are 55 mm wide, 105 mm tall, 117 mm deep. The main circuit terminals accept screw-type connections with M6 screws; the auxiliary circuit accepts 2× (0.5 to 2.5 mm²) solid or stranded wire. Use a Pozidriv PZ2 screwdriver tip with a 5–6 mm shaft diameter. ## Note on the 'Tripped' message The spec record carries a note reading \"for message 'Tripped'\". This refers to the relay's auxiliary contact configuration: when the overload trips, the integrated auxiliary switch changes state to signal the condition. The 3RU2136-4KD1 is wired so that the normally-open contact closes on trip, sending a 'Tripped' signal back to the PLC or annunciator. Confirm the wiring diagram in the product documentation matches your control logic — some installations use the normally-closed contact in series with the contactor coil for direct shutdown.","metaTitle":"Siemens 3RU2136-4KD1 SIRIUS Thermal Overload Relay, Size S2,","metaDescription":"Siemens 3RU2136-4KD1 SIRIUS thermal overload relay, Size S2, Trip Class 10A, rated 690 V. Current lifecycle stage. Sourced to order against RFQ. Dimensions 55x105x117 mm.","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","Height":"105 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"5.7 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 10A","Rated Value":"690 V","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":"37 kW","at 480 V rated value":"73 A","at 500 V rated value":"45 kW","at 600 V rated value":"73 A","at 690 V rated value":"55 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":"73 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":"73 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":"17.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"62 ... 73 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,"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=311684&mlfb=3RU2136-4KD1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4KD1/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3RU2136-4KD1?","answer":"Trip Class 10A, rated voltage 690 V, Size S2. Motor power ratings: 37 kW at 400 V, 45 kW at 500 V, 55 kW at 690 V. Auxiliary contact ratings include 2 A at 24 V and 3 A at 120 V."},{"question":"Where can I buy the 3RU2136-4KD1 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request through the storefront; availability and current pricing are confirmed at quote time."},{"question":"What does the 'Tripped' note mean on this relay?","answer":"The auxiliary switch is configured to signal a 'Tripped' condition when the overload release activates. The normally-open contact closes on trip to send the signal to a PLC or indicator."},{"question":"What are the physical dimensions of the 3RU2136-4KD1?","answer":"Width 55 mm, height 105 mm, depth 117 mm. Stand-alone installation; mounting position any."},{"question":"Does the 3RU2136-4KD1 have RoHS compliance documentation?","answer":"Yes, the RoHS compliance date is October 15, 2014. The part is in the SIRIUS product family and carries standard Siemens compliance documentation for REACH and RoHS."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4KD1","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/3RU2136-4KD1 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}}