{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU6116-1FB1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU6116-1FB1","canonicalUrl":"https://aoctrl.com/siemens/3RU6116-1FB1","factsUrl":"https://aoctrl.com/api/mcp/products/3RU6116-1FB1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3.5...5.0 A adjustable, Trip Class 10, Size S00, screw-type terminals, stand-alone installation.","salesMarkdown":"It provides Class 10 tripping for motors drawing between 3.5 and 5.0 A full-load current — the adjustable current response value is set via a dial on the front face. The thermal bimetallic element tracks motor heating directly, so it protects against sustained overcurrents without nuisance tripping on brief starting inrush, as long as the start time stays within the Class 10 curve. The adjustable range of 3.5...5.0 A is the first thing to check against your motor nameplate FLA. If your motor draws 4.2 A, this relay lands in the middle of its range — that is the sweet spot for accurate thermal protection. If your motor has a long acceleration time (high-inertia loads like centrifuges), you would need a Class 20 or 30 relay instead. The 6 kV surge voltage resistance means it handles typical industrial transient spikes without flashover. Operating frequency is 50...60 Hz — fine for any standard mains supply worldwide. Power dissipation is 6.1 W typical total, with 2.2 W per pole and 6.6 W at rated current in hot operating state. That is modest heat for a panel — no forced cooling needed in a standard enclosure, but keep the 6 mm side spacing to grounded parts for natural convection. This relay is designed for stand-alone installation — it does not snap directly onto a contactor coil assembly. The Size S00 designation means it shares the same mounting footprint as S00 contactors, so it fits neatly into a standard control panel layout. Dimensions are 89 mm high, 45 mm wide, 80 mm deep. Wire termination accepts 2× (0.5...1.5 mm²) solid or 2× (0.75...2.5 mm²) stranded for the main circuit, and 2× (20...16) AWG or 2× (20...18) AWG for auxiliary contacts. Tightening torque for main contact screws is 0.8...1.2 N·m — use a torque screwdriver to avoid terminal damage. The electrical connectors for the main circuit are arranged top and bottom, which keeps wiring straight and avoids crossing phases. ## Environmental limits and approvals Relative humidity during operation is 0...90 %. Shock resistance is 8 g for 11 ms per IEC 60068-2-27. Maximum installation altitude is 2 000 m above sea level — above that, derate the current-carrying capacity per the manufacturer's guidelines. The relay carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance for that cut-off.","metaTitle":"Siemens 3RU6116-1FB1 SIRIUS Thermal Overload Relay, 3.5-5 A,","metaDescription":"Siemens SIRIUS 3RU6116-1FB1 thermal overload relay, adjustable 3.5-5.0 A, Trip Class 10, Size S00. Screw terminals, stand-alone mount. Current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"80 mm","Width":"45 mm","title":"3RU6116-1FB1","Height":"89 mm","at 24 V":"2 A","Per Pole":"2.2 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 3.5...5.0 A size S00, class 10, for motor protection stand-alone installation main circuit: screw terminal AUX. circuit: screw terminal manual automatic reset","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"stand-alone installation","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","For Main Current Circuit":"screw-type terminals","power loss [W] total typical":"6.1 W","Operating Voltage Rated Value":"690 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"5 A","at AWG cables for main contacts":"2x (20 ... 16), 2x (20 ... 18), 2x 12","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 90 %","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 / 11 ms","Required Spacing For Grounded Parts At The Side":"6 mm","Size Of Contactor Can Be Combined Company-Specific":"S00","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Tightening Torque For Main Contacts With Screw-Type Terminals":"0.8 ... 1.2 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":"6.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3.5 ... 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/358c9e35c57afcc194d896021c046202.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621521&mlfb=3RU6116-1FB1"},"ai":{"faq":[{"question":"What is the adjustable current range of this overload relay?","answer":"The adjustable current response value is 3.5...5.0 A. Set the dial to match the motor nameplate full-load amps."},{"question":"What Trip Class is the 3RU6116-1FB1?","answer":"It is Trip Class 10, meaning it will trip within 10 seconds at 7.2× the current setting. Suitable for standard motor starting duty."},{"question":"Does the 3RU6116-1FB1 replace the 6ES7221-1BH32-0XB0?","answer":"No. The 6ES7221-1BH32-0XB0 is a Siemens SIMATIC S7-1200 digital input module — a completely different product class. The 3RU6116-1FB1 is a thermal overload relay for motor protection; it cannot drop into a panel specified for a PLC I/O module without a full redesign of that part of the circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU6116-1FB1","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/3RU6116-1FB1 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}}