{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4EB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4EB0","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4EB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4EB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S2 thermal overload relay, 3RU2136-4EB0, CLASS 10, 15 kW at 400 V, 32 A at 480 V, contactor-mount, screw terminals.","salesMarkdown":"## CLASS 10 Trip — What It Means for Motor Starting The 3RU2136-4EB0 is a CLASS 10 thermal overload relay. That means at 7.2× the full-load current setting, the bimetal trip must open within 10 seconds. For a standard motor driving a pump, fan, or conveyor, CLASS 10 gives enough time for the starting inrush to pass without nuisance tripping, but it's not meant for high-inertia loads like flywheels or crushers — those need CLASS 20 or CLASS 30. If your motor starts against a heavy load and the relay trips during start, the CLASS 10 ceiling is the first thing to check. ## S2 Frame — Mounting and Panel Fit This is an S2-size overload relay from the SIRIUS family. It mounts directly onto the matching SIRIUS contactor via the fastening method listed as 'contactor mounting' — there is no DIN-rail clip on the relay itself. The main contacts use M6 screws. The dimensions are 55 mm wide, 90 mm high, 105 mm deep. That depth includes the contactor body underneath; plan for at least 120 mm of enclosure depth to clear the wiring and the manual reset button. ## Auxiliary Contact Ratings — Control Circuit Limits The integrated auxiliary switch is rated for control-circuit voltages across the board: 2 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V, and 0.75 A at 690 V. At 60 V it drops to 0.3 A; at 110 V and 125 V it's 0.22 A; at 220 V it's 0.11 A. These are the switching limits for the signal contacts — if your PLC output card sources more than 3 A at 120 V, you need an interposing relay. The per-pole power dissipation is 4.6 W, which matters for thermal budgeting inside a sealed enclosure. ## Motor Power Ratings — Which Voltage Matches Your Motor The relay's motor power ratings are voltage-dependent: 15 kW at 400 V, 18.5 kW at 500 V, and 30 kW at 690 V. At 480 V and 600 V the rating is 32 A — that's the current limit, not a power figure. For a 480 V motor, 32 A corresponds to roughly 22 kW (30 HP) in a standard NEMA design. The maximum rated voltage is 690 V, and the AC-3e rated voltage maximum is also 690 V. The trip class is thermal, so ambient temperature compensation is active from -40 to +60 °C.","metaTitle":"Siemens 3RU2136-4EB0 SIRIUS S2 Thermal Overload Relay","metaDescription":"Siemens 3RU2136-4EB0 SIRIUS S2 thermal overload relay, CLASS 10 trip, 15 kW at 400 V, 32 A at 480 V. Active production. Quoted to order against BOM.","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":"3RU2136-4EB0","Height":"90 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"4.6 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 22...32 A Thermal For motor protection Size S2, Class 10 Contactor mounting 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":"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":"15 kW","at 480 V rated value":"32 A","at 500 V rated value":"18.5 kW","at 600 V rated value":"32 A","at 690 V rated value":"30 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":"32 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":"32 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":"13.8 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"22 ... 32 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":"$49.53","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=104959&mlfb=3RU2136-4EB0"},"ai":{"faq":[{"question":"What does the 'Tripped' note on the 3RU2136-4EB0 mean?","answer":"The note 'for message Tripped' refers to the auxiliary contact position when the relay has tripped. It is not a fault code — it is the label for the signal contact that closes (or opens) when the bimetal releases. In a typical control circuit, this contact feeds a PLC input or a pilot light to indicate the relay has tripped. If you see 'Tripped' on the nameplate, it is the normally-open contact that closes on trip."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4EB0","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/3RU2136-4EB0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}