{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1136-1KB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1136-1KB0","canonicalUrl":"https://aoctrl.com/siemens/3RU1136-1KB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1136-1KB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1136-1KB0, CLASS 10, S2 size, screw terminals, IP20 front.","salesMarkdown":"This is the S2 frame size, the mid-range physical format in the SIRIUS family. It mounts directly onto a contactor (fastening method: contactor mounting, per the spec) and uses screw-type terminals for both the main and auxiliary circuits. The front is IP20 — safe for finger contact inside an enclosed panel, but not for open-panel washdown areas. Physical envelope: 55 mm wide, 105 mm tall, 118 mm deep. Those are the dimensions that matter when you're laying out a DIN-rail panel or a backplate. That means you can butt it against adjacent devices on three sides, which helps with panel density. Mounting position is flexible: vertical mounting surface with ±135° rotation and ±45° tilt front-to-back. That covers most panel orientations you'll encounter. The shock resistance is rated at 8g for 10 ms, which is adequate for industrial machinery but not for mobile equipment or high-vibration applications. ## Ratings that matter for the BOM This relay carries ATEX approval (DMT 98 ATEX G 001), so it's listed for use in potentially explosive atmospheres — a common requirement in chemical, grain, and pharmaceutical lines. Auxiliary contact ratings cover the standard control voltages you'll see in a panel: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, 1 A at 400 V. The 24 V rating at 1 A is the one most often used for PLC inputs — it's enough to drive a typical 24 VDC input module without a separate interposing relay. Wire range is generous: solid conductors from 0.5 to 2.5 mm² (doubled up), and stranded up to 35 mm². For the main circuit, AWG 18 to 1. That covers everything from control wiring to power feeds without needing adapters.","metaTitle":"Siemens 3RU1136-1KB0 SIRIUS Thermal Overload Relay, CLASS 10","metaDescription":"Siemens 3RU1136-1KB0 SIRIUS thermal overload relay, CLASS 10 trip, S2 size, IP20 front. Current-production part sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"118 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"55 mm","Height":"105 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"2.5 W","Stranded":"2x (0.75 ... 25 mm²), 0.75 ... 35 mm²","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","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 10","At The Side":"6 mm","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"8g / 10 ms","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Product Brand Name":"SIRIUS","Type Of Protection":"DMT 98 ATEX G 001","Product Designation":"thermal overload relay","Size Of Overload Relay":"S2","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"2x (18 ... 3), 1x (18 ... 1)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","Size Of Contactor Can Be Combined Company-Specific":"S2","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/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":"7.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9763c79e16590351182b766f07889d7c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=171388&mlfb=3RU1136-1KB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1136-1KB0/alternatives.json"},"ai":{"faq":[{"question":"What are the specifications of the 3RU1136-1KB0 overload relay?","answer":"Key specs: CLASS 10 trip, S2 size, 55 mm wide × 105 mm tall × 118 mm deep, IP20 front, screw-type terminals, ATEX approved (DMT 98 ATEX G 001), 6 kV surge voltage resistance, mounts directly on a contactor with 0 mm clearance on three sides."},{"question":"What is the difference between 3RU1136-1KB0 and 3RU2126-1KB0?","answer":"Both are S2-size, CLASS 10 thermal overload relays from the SIRIUS family. The 3RU2126-1KB0 is a newer design variant. The practical difference is in terminal layout and compatibility with certain contactor series — check the mounting interface against your specific contactor before swapping one for the other."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1136-1KB0","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/3RU1136-1KB0 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}}