{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3143-4XX1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3143-4XX1","canonicalUrl":"https://aoctrl.com/siemens/3RB3143-4XX1","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3143-4XX1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, Size S3, 3RB3143-4XX1, rated thermal current 115 A, adjustable trip classes 5E/10E/20E/30E, for message \"tripped\".","salesMarkdown":"The Siemens 3RB3143-4XX1 is a SIRIUS solid-state overload relay in Size S3, designed to protect motors against overload and phase failure. It carries a rated thermal current of 115 A at both 480 V and 600 V, with a maximum operating voltage of 1 000 V. The trip class is field-adjustable among CLASS 5E, 10E, 20E, and 30E, letting you match the relay to the motor's starting characteristics — useful when the same panel builds see different load profiles. Mounts in any position via stand-alone installation — no DIN-rail adapter required, though the 70 mm width and 106 mm height fit standard backpanel layouts. Depth is 124 mm, so account for that when spacing the enclosure door or adjacent components. The main current circuit uses straight-through transformers, meaning the motor leads pass directly through the relay body without looping. Screw terminals accept 2x (0.25... 1.5 mm²) solid or stranded wire; use a Pozidriv PZ 2 tip with a 5 to 6 mm shaft diameter. The auxiliary switch is integrated into the relay body, with contact ratings spanning 24 V at 2 A, 120 V at 4 A, and 230 V at 3 A — enough to drive a PLC input or a contactor coil directly. The relay also provides a dedicated \"tripped\" message output (the Note on the order code references this), so the control system sees a distinct signal when the relay has operated, not just a generic fault. The overload relay's trip threshold is set by the motor full-load current: the minimum trip occurs when IMotor is greater than the lower current setting value, and the maximum trip occurs when IMotor is less than the upper current setting value multiplied by 3.5. This gives a wide adjustment band for matching the relay to the motor nameplate. The S3 frame size covers the 115 A thermal current class, suitable for medium-horsepower motors in the 30–75 kW range depending on voltage and duty cycle.","metaTitle":"Siemens 3RB3143-4XX1 SIRIUS Solid-State Overload Relay, S3,","metaDescription":"Siemens 3RB3143-4XX1 SIRIUS solid-state overload relay, Size S3, rated thermal current 115 A, adjustable trip classes 5E-30E. Currently in production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"124 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"70 mm","title":"3RB3143-4XX1","Height":"106 mm","Maximum":"IMotor < upper current setting value x 3.5","Minimum":"IMotor > lower current setting value","at 24 V":"2 A","at 60 V":"0.55 A","Per Pole":"0.2 W","at 110 V":"0.3 A","at 120 V":"4 A","at 125 V":"0.3 A","at 220 V":"0.11 A","at 230 V":"3 A","Trip Class":"CLASS 5E, 10E, 20E and 30E adjustable","Rated Value":"1 000 V","description":"Overload relay 32...115 A Electronic For motor protection Size S3, Class 5E...30E Stand-alone installation Main circuit: Straight-through transformer Auxiliary circuit: Spring-type terminal Manual-Automatic-Reset","During Storage":"-40 ... +80 °C","Thermal Current":"115 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"stand-alone installation","Shock Resistance":"8g / 11 ms","Mounting Position":"any","Solid Or Stranded":"2x (0,25 ... 1,5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"solid-state overload relay","Vibration Resistance":"1-6 Hz, 15 mm; 6-500 Hz, 20 m/s²; 10 cycles","at 480 V rated value":"115 A","at 600 V rated value":"115 A","Size Of Overload Relay":"S3","For Main Current Circuit":"straight-through transformers","Temperature Compensation":"-25 ... +60 °C","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","according to IEC 60068-2-27":"15g / 11 ms; Signaling contact 97 / 98 in position \"Tripped\": 8g / 11 ms","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"03/01/2017","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"115 A","for AC motors at 500 V at 50 Hz":"22 ... 75 kW","for AC motors at 690 V at 50 Hz":"30 ... 90 kW","for remote-reset function at DC":"24 V","For Auxiliary And Control Circuit":"spring-loaded terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 315 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"8 kV","With Type Of Coordination 1 Required":"gG: 315 A","for 3-phase motors at 400 V at 50 Hz":"18.5 ... 55 kW","for AWG cables for auxiliary contacts":"2x (24 ... 16)","Between Auxiliary And Auxiliary Circuit":"300 V","due to burst according to IEC 61000-4-4":"2 kV (power ports), 1 kV (signal ports) corresponds to degree of severity 3","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","Finely Stranded Without Core End Processing":"2x (0.25 ... 1.5 mm²)","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","operational current at AC-3e at 400 V rated value":"115 A","Size Of Contactor Can Be Combined Company-Specific":"S3","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","Type Of Voltage Supply Via Input/Output Link Master":"No","contact rating of auxiliary contacts according to UL":"B600 / R300","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Response Time Of The Grounding Protection In Settled State":"1 000 ms","Response Value Current Of The Grounding Protection Minimum":"0.75 x IMotor","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 6 A","insulation voltage with degree of pollution 3 at AC rated value":"1 000 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","power loss [W] for rated value of the current at AC in hot operating state":"0.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"32 ... 115 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e573d985c47da8f40ebc92f80d3039b6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629753&mlfb=3RB3143-4XX1"},"ai":{"faq":[{"question":"Where can I buy 3RB3143-4XX1 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the note for message \"tripped\" on this component?","answer":"The order code 3RB3143-4XX1 carries a Note indicating it is configured for a \"tripped\" message output, meaning the auxiliary contact signals a distinct tripped state rather than a generic alarm."},{"question":"What is the depth of 3RB3143-4XX1?","answer":"The depth is 124 mm, which is the dimension from the mounting surface to the furthest protruding point of the relay body."},{"question":"What compliance documentation does Siemens provide for 3RB3143-4XX1?","answer":"The part carries a substance prohibitance date of 03/01/2017, indicating RoHS compliance from that date. The SIRIUS series typically provides CE, UL, and CSA certifications; specific documentation is available upon request with an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3143-4XX1","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/3RB3143-4XX1 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}}