{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5136-4FB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5136-4FB0","canonicalUrl":"https://aoctrl.com/siemens/3RU5136-4FB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5136-4FB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU5136-4FB0, adjustable current response 28-40 A, Trip Class 10, 690 V, 50-60 Hz, for contactor mounting on S2 size.","salesMarkdown":"It mounts directly onto a S2-size contactor (the company-specific combination size), so it integrates as a single assembly on the DIN rail — no separate bracket or wiring between the contactor and the relay. The adjustable current response range of 28 to 40 A covers a common band for medium-horsepower three-phase motors. The rated operational current of 40 A is the top of the adjustment range, meaning you size the motor full-load current within that window and set the dial to match. If your motor has a longer acceleration time (high-inertia loads like fans or centrifuges), Class 10 may be too fast and cause nuisance tripping; you would then step to a Class 20 or 30 relay. Rated operating voltage of 690 V AC at 50-60 Hz covers the common 400 V and 480 V three-phase systems with headroom for 690 V applications. Main circuit terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded, or 2× (18 to 3 AWG) and 1× (18 to 1 AWG). Tightening torque for main contacts is 3 to 5 N·m — a standard screwdriver range, no special tooling required. That heat must be dissipated within the enclosure — account for it in your thermal budget, especially if the relay is mounted in a sealed cabinet with other heat sources. Operating temperature range of -20 to +70 °C suits most indoor industrial environments; storage and transport range of -55 to +80 °C covers cold-weather shipping and hot warehouse storage. Relative humidity tolerance of 0 to 100 % means condensation is not a problem for the relay itself. Fastening method is contactor mounting — the relay clips directly onto the S2 contactor. Mounting position allows rotation of ±135° on a vertical surface and tilting of ±45° front-to-back, giving flexibility in tight panels. Required spacing to grounded parts at the side is 6 mm. Dimensions are 118 mm depth, 55 mm width, 105 mm height. The 118 mm depth means the assembly protrudes into the enclosure — verify your enclosure depth if using a shallow box. Auxiliary circuit terminals accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) or 2× (20 to 16 AWG) and 2× (18 to 14 AWG). The relay carries a substance prohibition date of 07/01/2006, aligning with RoHS compliance for the European directive. Surge voltage resistance is rated at 6 kV, and shock resistance per IEC 60068-2-27 is 8g for 10 ms. Installation altitude is limited to 2000 m above sea level.","metaTitle":"Siemens 3RU5136-4FB0 SIRIUS Thermal Overload Relay, 28-40 A,","metaDescription":"Siemens 3RU5136-4FB0 SIRIUS thermal overload relay, adjustable 28-40 A, Trip Class 10, 690 V, 50-60 Hz, contactor mounting. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"118 mm","Width":"55 mm","title":"3RU5136-4FB0","Height":"105 mm","at 24 V":"1 A","Per Pole":"5.2 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 28...40 A size S2, class 10 for motor protection for mounting onto contactors main circuit: screw terminal AUX. circuit: screw terminal manual automatic reset","lifecycle_stage":"current","During Operation":"-20 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","Mounting Position":"with vertical mounting surface +/-135° rotatable, with vertical mounting surface +/- 45° tiltable to the front and back","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Thermal overload relay","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"9 W","Operating Voltage Rated Value":"690 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 A","at AWG cables for main contacts":"2x (18 ... 3), 1x (18 ... 1)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","shock resistance according to IEC 60068-2-27":"8g / 10 ms","Required Spacing For Grounded Parts At The Side":"6 mm","Size Of Contactor Can Be Combined Company-Specific":"S2","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 gL/gG: 6 A, quick: 10 A","Tightening Torque For Main Contacts With Screw-Type Terminals":"3 ... 5 N·m","insulation voltage with degree of pollution 3 at AC rated value":"690 V","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":"28 ... 40 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f507f514c2076c464326939e3ab72ea1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621238&mlfb=3RU5136-4FB0"},"ai":{"faq":[{"question":"What is the adjustable current range of 3RU5136-4FB0?","answer":"The adjustable current response value is 28 to 40 A, with a rated operational current of 40 A."},{"question":"What Trip Class is 3RU5136-4FB0?","answer":"Trip Class 10 — the relay trips within 10 seconds at 7.2× the current setting, suitable for standard-start induction motors."},{"question":"What contactor size does 3RU5136-4FB0 mount on?","answer":"It mounts on the S2 size contactor (company-specific combination size) via direct contactor mounting."},{"question":"Where can I buy 3RU5136-4FB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5136-4FB0","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/3RU5136-4FB0 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}}