{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5136-4HB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5136-4HB1","canonicalUrl":"https://aoctrl.com/siemens/3RU5136-4HB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5136-4HB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU5136-4HB1, 40-50 A adjustable, Class 10 trip, 690 V, 50-60 Hz, screw-type terminals.","salesMarkdown":"The Siemens SIRIUS 3RU5136-4HB1 is a thermal overload relay rated 50 A operational current, adjustable from 40 to 50 A, with a Class 10 trip characteristic. It is designed for three-phase motor protection in industrial control panels, combining with the S2-size contactor frame. The operating voltage is rated 690 V at 50-60 Hz, and it mounts stand-alone with a vertical mounting surface that allows ±135° rotation and ±45° tilt. The 40-50 A adjustable current range covers the full-load amps of a 22-30 kW motor at 400 V (roughly 45-55 A FLA), so this relay directly protects that motor class. ## Panel and mounting considerations This relay installs stand-alone — it does not require a separate mounting base. The mounting position allows ±135° rotation and ±45° tilt from vertical, giving flexibility in tight enclosures. Required spacing to grounded parts at the side is 6 mm, so plan for that gap when laying out the DIN rail. Main contacts use screw-type terminals with a tightening torque of 3-5 N·m, accepting 2x (0.5-1.5 mm²) solid or stranded, or 2x (0.75-2.5 mm²) finely stranded with ferrules. For AWG, that's 2x (18-3) for main and 2x (20-16) for auxiliary contacts. ## Auxiliary circuit and short-circuit protection For the auxiliary switch circuit, the required short-circuit protection is a gL/gG fuse rated 6 A, or a quick-acting fuse rated 10 A. The auxiliary contacts use screw-type terminals. This relay has three poles for the main current circuit, with electrical connectors arranged top and bottom. The insulation voltage at degree of pollution 3 is rated 690 V AC.","metaTitle":"Siemens 3RU5136-4HB1 SIRIUS Thermal Overload Relay, 40-50 A,","metaDescription":"Siemens SIRIUS 3RU5136-4HB1 thermal overload relay, 40-50 A adjustable, Class 10 trip, 690 V, 50-60 Hz. Current lifecycle stage. Screw terminals. RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"118 mm","Width":"55 mm","title":"3RU5136-4HB1","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, 40...50 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":"stand-alone installation","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":"50 A","for 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","for 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":"40 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ffcc714c6f1801decc6ef1c47598fa71.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621244&mlfb=3RU5136-4HB1"},"ai":{"faq":[{"question":"What are the key ratings of the 3RU5136-4HB1?","answer":"The key ratings are: adjustable current 40-50 A, rated operational current 50 A, Class 10 trip, operating voltage 690 V at 50-60 Hz, and typical power loss 9 W."},{"question":"Does the 3RU5136-4HB1 combine with a specific contactor size?","answer":"Yes, it combines with the S2-size contactor frame from the Siemens SIRIUS family."},{"question":"What compliance documentation does the 3RU5136-4HB1 have?","answer":"The relay is RoHS compliant per the substance prohibitance date of July 1, 2006. It also meets shock resistance per IEC 60068-2-27 and has a rated surge voltage resistance of 6 kV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5136-4HB1","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/3RU5136-4HB1 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}}