{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4QB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4QB1","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4QB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4QB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, size S2, 3RU2136-4QB1, Class 10, 30 kW at 400 V, screw terminals, integrated auxiliary switch.","salesMarkdown":"It mounts directly to a contactor or stands alone, and its thermal bimetallic release tracks motor heating with temperature compensation from -40 to +60 °C — meaning the trip point stays stable whether the panel is in a cold warehouse or a hot NEMA enclosure next to a furnace. Rated insulation voltage is 690 V, and the relay is rated for motor loads up to 30 kW at 400 V (AC-3e duty), 37 kW at 500 V, and 55 kW at 690 V. The 57 A current rating at 480 V and 600 V confirms its place in North American 480 V systems as well as IEC 400 V installations. The integrated auxiliary switch (1 N/O + 1 N/C, flagged by the 'Tripped' message) carries 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. The 24 V 2 A rating is the one most PLC input cards will see — it comfortably drives a 24 VDC relay or a digital input module, provided the total loop draw stays under that figure. At 120 VAC the 3 A rating handles a typical motor-starter pilot light or alarm annunciator. The 0.75 A at 690 V is for the rare case where the auxiliary feeds a 690 V control transformer; most panels never see that. Dimensions are 55 mm wide, 105 mm tall, 117 mm deep — the S2 footprint. It mounts in any position, stand-alone or ganged to a SIRIUS contactor. Main circuit terminals accept 2 x (0.5 to 1.5 mm²) or 2 x (0.75 to 2.5 mm²) solid or stranded copper, terminated with a Pozidriv PZ2 screwdriver (shaft diameter 5 to 6 mm). The M6 screw on the main contacts is common for this frame size; torque it to the manufacturer's spec, not by feel.","metaTitle":"Siemens 3RU2136-4QB1 SIRIUS Thermal Overload Relay, Class 10","metaDescription":"Siemens SIRIUS 3RU2136-4QB1 thermal overload relay, size S2, Class 10, 30 kW at 400 V. Screw terminals, integrated auxiliary switch. Quoted to order against RFQ.","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":"5.2 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","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":"57 A","at 500 V rated value":"37 kW","at 600 V rated value":"57 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":"57 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":"57 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":"47 ... 57 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=70494&mlfb=3RU2136-4QB1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4QB1/alternatives.json"},"ai":{"faq":[{"question":"What is the Class 10 trip characteristic for this overload relay?","answer":"Class 10 means the relay will trip within 10 seconds at 600% of the current setting. This is the standard for standard-duty motor starting — it lets the motor accelerate under load without nuisance tripping, provided the start time stays under 10 seconds."},{"question":"What motor power can this relay handle at 400 V?","answer":"At 400 V AC-3e duty, the 3RU2136-4QB1 is rated for 30 kW. At 500 V it handles 37 kW, and at 690 V it handles 55 kW. For North American 480 V systems the current rating is 57 A."},{"question":"Where can I buy the 3RU2136-4QB1 and get current pricing?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the 'Tripped' message noted on this relay?","answer":"The note 'for message Tripped' refers to the auxiliary switch contact that changes state when the relay has tripped on overload. It provides a remote indication — typically wired to a PLC input or alarm panel — that the relay has operated and needs manual reset."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4QB1","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/3RU2136-4QB1 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}}