{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU1146-4LB0-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU1146-4LB0-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RU1146-4LB0-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4LB0-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS thermal overload relay, 3RU1146-4LB0-ZW98, Size S3, Trip Class 10, screw-type terminals, ATEX certified, IP20 front protection.","salesMarkdown":"## SIRIUS thermal overload relay, Size S3, Class 10 Rated for a wide operating temperature range of -20 to +70 °C and shock resistant to 8g / 10 ms, this relay is built for the vibration and thermal cycling common on conveyor drives, pump skids, and compressor panels. ATEX certification (DMT 98 ATEX G 001) is on record, so the relay can be specified for motor circuits in potentially explosive atmospheres (Zone 1 or Zone 2, gas groups) when paired with a suitably rated contactor and upstream protection. ## Auxiliary contact ratings and coordination The auxiliary contact block is rated for switching at multiple control voltages: 1 A at 24 V, 3 A at 120 V, 2 A at 230 V, and 1 A at 400 V. These are the make/break capacities for the signal circuit — useful for PLC inputs, alarm annunciators, or contactor coil control in the same panel. ## Mounting and wiring flexibility Mounting position is flexible: the relay can be rotated ±135° on a vertical mounting surface and tilted ±45° front-to-back, which helps when fitting into tight panel layouts or existing busbar arrangements. Dimensions are 70 mm wide × 120 mm high × 140 mm deep — a standard S3 footprint that matches the SIRIUS contactor range. Main circuit terminals accept screw-type connections for stranded wire: 2× (10 … 50 mm²) or 10 … 70 mm² single, and AWG equivalents 2× (10 … 1/0) or 1× (10 … 2/0). Auxiliary and control circuit terminals take 2× (0.5 … 1.5 mm²) solid or 2× (0.75 … 2.5 mm²) stranded, with AWG 2× (20 … 16) or 2× (18 … 14). This covers the full range of motor power wiring and control cabling in a typical MCC bucket. Substance prohibitance date of 07/01/2006 aligns with early RoHS compliance; the ATEX certification (DMT 98 ATEX G 001) provides the documentation needed for hazardous-area installations.","metaTitle":"Siemens 3RU1146-4LB0-ZW98 SIRIUS Thermal Overload Relay, Cla","metaDescription":"Siemens 3RU1146-4LB0-ZW98 SIRIUS thermal overload relay, Class 10, Size S3, ATEX certified. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"140 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"70 mm","Height":"120 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","Per Pole":"7 W","Stranded":"2x (10 ... 50 mm²), 10 ... 70 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":"S3","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Relative Humidity During Operation":"100 %","With Type Of Assignment 2 Required":"gG: 160 A","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 250 A","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":"S3","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":"1 000 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":"21 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"70 ... 90 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=371371&mlfb=3RU1146-4LB0-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU1146-4LB0-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What is 3RU1146-4LB0-ZW98's depth?","answer":"The depth is 140 mm, part of the S3 Size footprint (70 mm wide × 120 mm high × 140 mm deep)."},{"question":"What wire sizes does 3RU1146-4LB0-ZW98 accept?","answer":"Main circuit terminals accept stranded wire 2× (10 … 50 mm²) or 10 … 70 mm² single (AWG 2× 10 … 1/0 or 1× 10 … 2/0). Auxiliary terminals accept solid 2× (0.5 … 1.5 mm²) or stranded 2× (0.75 … 2.5 mm²) (AWG 2× 20 … 16 or 2× 18 … 14). All terminals are screw-type."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU1146-4LB0-ZW98","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/3RU1146-4LB0-ZW98 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}}