{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU5146-4EB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU5146-4EB0","canonicalUrl":"https://aoctrl.com/siemens/3RU5146-4EB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RU5146-4EB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU5146-4EB0, 3-pole, adjustable 22-32 A, Trip Class 10, screw-type terminals, contactor mounting.","salesMarkdown":"It mounts directly onto a SIRIUS S3 contactor (no separate base required), saving DIN-rail space and wiring time. The adjustable current response range is 22 to 32 A, with a rated operational current of 32 A. The 22-32 A adjustable range covers motor FLA from 22 A to 32 A. The 3-pole design matches a three-phase motor. That heat has to go somewhere — the relay relies on natural convection, so the required 6 mm spacing to grounded parts at the side isn't optional. Stacking relays tighter than that derates the trip curve. Humidity tolerance is 0 to 100%, so condensation inside a non-condensing enclosure is fine, but direct washdown isn't — the screw terminals are IP20 at best without an enclosure. Mounting position: vertical surface with ±135° rotation or ±45° tilt front/back. The 3RU5146-4EB0 is the screw-terminal variant. If your panel uses spring-cage or ring-lug terminations, there's a sibling with the same current range and different terminal style — same trip curve, same S3 footprint. No rewiring of the panel layout needed, just the lug type. Dimensions: 70 mm wide, 120 mm tall, 140 mm deep. It clips onto the contactor — no DIN-rail footprint of its own. That means the contactor's width (typically 45 or 55 mm for S3) determines the combined width; the relay adds depth behind it. Wire sizes: main circuit accepts 2×(0.5-1.5 mm²) or 2×(0.75-2.5 mm²) solid/stranded, or AWG 2×(10-1/0). Auxiliary/control circuit: 2×(20-16) or 2×(18-14) AWG. Tightening torque for main terminals: 4-6 N·m. Use a torque screwdriver — under-torquing creates a hot joint that fools the bimetallic strip into early tripping. Short-circuit protection for the auxiliary switch: fuse gL/gG 6 A or quick-acting 10 A. That's for the control circuit, not the main power — the main circuit protection is sized to the upstream breaker or fuse feeding the contactor. Rated insulation voltage: 1000 V AC at pollution degree 3. Rated operating voltage: 1000 V. Surge voltage resistance: 8 kV. Shock resistance: 8 g for 10 ms per IEC 60068-2-27. Frequency: 50-60 Hz. Substance prohibitance date: July 1, 2006 — aligns with RoHS compliance.","metaTitle":"Siemens 3RU5146-4EB0 SIRIUS Thermal Overload Relay, 22-32 A,","metaDescription":"Siemens SIRIUS 3RU5146-4EB0 thermal overload relay. Adjustable 22-32 A, Trip Class 10, 3-pole, screw terminals. Current production. Sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"140 mm","Width":"70 mm","title":"3RU5146-4EB0","Height":"120 mm","at 24 V":"1 A","Per Pole":"4.5 W","at 110 V":"0.22 A","at 230 V":"2 A","Trip Class":"CLASS 10","description":"Overload relay 22...32 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":"16.5 W","Operating Voltage Rated Value":"1 000 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"32 A","for AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"0 ... 100 %","Surge Voltage Resistance Rated Value":"8 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":"S3","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":"4 ... 6 N·m","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","power loss [W] for rated value of the current at AC in hot operating state":"13.5 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"22 ... 32 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/473d7777af1e1ab810670c77a7a752df.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621246&mlfb=3RU5146-4EB0"},"ai":{"faq":[{"question":"What is the adjustable current range on this relay?","answer":"The adjustable current response value is 22 to 32 A. That's the range you set via the dial on the front of the relay to match the motor's full-load amperage."},{"question":"What contactor does this relay mount to?","answer":"It mounts directly onto a SIRIUS S3-size contactor, using the contactor mounting method. No separate base or adapter needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU5146-4EB0","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/3RU5146-4EB0 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}}