{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4JB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4JB1","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4JB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4JB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-4JB1 thermal overload relay, Size S2, Class 10, 690 V rated insulation voltage, 65 A at 480/600 V, screw terminals.","salesMarkdown":"## Size S2 Class 10 — what the ratings mean out here The 3RU2136-4JB1: This is a SIRIUS thermal overload relay, Size S2, designed to protect a motor from sustained overcurrent by tracking the heat buildup in the windings — the bimetallic strip bends and trips the contactor when the current stays high too long. Class 10 trip means if the motor draws 7.2 times the full-load current, the relay opens in under 10 seconds — fast enough to keep the rotor from cooking on a stalled pump or jammed conveyor. Rated insulation voltage is 690 V, and the motor power ratings at that voltage hit 55 kW — so it handles a 75-hp-class motor at 690 V three-phase without the insulation breaking down. ## Panel fit and thermal budget The relay measures 55 mm wide by 105 mm tall by 117 mm deep — it mounts in any orientation, stand-alone on the panel or ganged with a contactor, and the screw terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded wire. Each pole dissipates 5.2 W at full load — in a sealed enclosure with a few of these, the heat adds up. The operating range is -40 to +70 °C, with temperature compensation active from -40 to +60 °C so the trip curve stays accurate even if the panel gets warm. ## Auxiliary contact ratings for the control circuit The integrated auxiliary switch handles 2 A at 24 V DC, 3 A at 120 V AC, and 2 A at 230 V AC — enough to drive a PLC input or a signal lamp. At 400 V AC it's rated 1 A, and at 690 V AC it drops to 0.75 A, which covers the higher-voltage control schemes in some European panels. The trip indicator shows a \"Tripped\" message on the front — no guessing whether the relay opened on overload or someone bumped the reset.","metaTitle":"Siemens 3RU2136-4JB1 SIRIUS Thermal Overload Relay, Size S2","metaDescription":"Siemens 3RU2136-4JB1 SIRIUS thermal overload relay, Size S2, Class 10 trip. Rated 690 V, 65 A at 480/600 V. Active production, available 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":"3RU2136-4JB1","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 54...65 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":"30 kW","at 480 V rated value":"65 A","at 500 V rated value":"45 kW","at 600 V rated value":"65 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":"65 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","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":"65 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":"54 ... 65 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=398793&mlfb=3RU2136-4JB1"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for the 3RU2136-4JB1?","answer":"The relay carries a substance prohibitance date of October 15, 2014, indicating RoHS compliance. Standard Siemens documentation includes the CE declaration and manufacturer's declaration for the EU machinery directive."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4JB1","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/3RU2136-4JB1 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}}