{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3133-4UW1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3133-4UW1","canonicalUrl":"https://aoctrl.com/siemens/3RB3133-4UW1","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3133-4UW1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB3133-4UW1 solid-state overload relay, Size S2, 50 A thermal current, 690 V rated, adjustable trip class 5E/10E/20E/30E, straight-through transformers, 55 x 81 x 109 mm.","salesMarkdown":"## Motor protection for 480/600 V branch circuits The Siemens 3RB3133-4UW1 is a SIRIUS solid-state overload relay in Size S2, designed to protect motors in 480 V and 600 V systems where the continuous thermal current is 50 A at both voltage levels. Rated voltage is 690 V with a maximum AC-3e switching voltage of 690 V, so it covers 400 V, 480 V, and 600 V motor branch circuits without derating. The trip class is field-adjustable among CLASS 5E, 10E, 20E, and 30E, letting the commissioning engineer match the relay's thermal curve to the motor's starting profile — a 5E setting for fast-cycling loads, 30E for high-inertia starts. ## Trip response and diagnostic output The relay trips when the motor current exceeds the upper current setting value by a factor of 3.5 or more, and resets when current drops below the lower setting value — this hysteresis prevents nuisance re-closure on a stalled motor. A dedicated signaling contact (97/98) changes state on trip, with a note for message 'tripped' — this can drive a PLC input or alarm lamp directly. The auxiliary switch is integrated into the relay housing, saving a separate add-on module and reducing wiring in the panel. ## Environmental and mechanical fit Dimensions are 55 mm wide, 81 mm high, and 109 mm deep — it mounts on DIN rail in any position, with stand-alone installation fastening. Operating temperature range is -25 to +60 °C, storage and transport from -40 to +80 °C, with temperature compensation active across the full operating band. Shock resistance is 15 g for 11 ms per IEC 60068-2-27, and vibration resistance covers 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s² for 10 cycles — suitable for machine-mounted panels on conveyors or presses. ## Wiring and termination Terminals accept solid or stranded wire: 1x 0.5–4 mm² or 2x 0.5–2.5 mm², with a Pozidriv PZ2 screwdriver tip and 5–6 mm shaft diameter for the clamping screws. The main current circuit uses straight-through transformers — the motor leads pass directly through the relay body, eliminating external current transformers and reducing panel wiring labor. Power dissipation per pole is 0.03 W, so thermal buildup in a crowded enclosure is negligible even at full rated current. ## Sourcing and lifecycle status Substance prohibitance date of 10/15/2014 confirms RoHS compliance for the European market. Sourced and quoted to order against the BOM quantity through independent distribution; availability and current pricing confirmed at RFQ time.","metaTitle":"Siemens 3RB3133-4UW1 SIRIUS solid-state overload relay, 50 A","metaDescription":"Siemens 3RB3133-4UW1 SIRIUS solid-state overload relay, 50 A thermal current at 480/600 V, adjustable trip class 5E-30E, 690 V rated.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"109 mm","Solid":"1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)","Width":"55 mm","title":"3RB3133-4UW1","Height":"81 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":"0.03 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":"690 V","description":"Overload relay 12.5...50 A Electronic For motor protection Size S2, Class 5E...30E Stand-alone installation Main circuit: Straight-through transformer Auxiliary circuit: Screw Manual-Automatic-Reset Internal ground fault detection","During Storage":"-40 ... +80 °C","Thermal Current":"50 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"stand-alone installation","Shock Resistance":"15g / 11 ms","Mounting Position":"any","Solid Or Stranded":"1x (0,5 ... 4 mm²), 2x (0,5 ... 2,5 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":"50 A","at 600 V rated value":"50 A","Size Of Overload Relay":"S2","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":"690 V","Substance Prohibitance (Date)":"10/15/2014","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"50 A","for AC motors at 500 V at 50 Hz":"11 ... 30 kW","for AC motors at 690 V at 50 Hz":"11 ... 45 kW","for remote-reset function at DC":"24 V","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","With Type Of Assignment 2 Required":"gG: 200 A","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"gG: 250 A","at AWG cables for auxiliary contacts":"1x (20 ... 14), 2x (20 ... 14)","for 3-phase motors at 400 V at 50 Hz":"7.5 ... 22 kW","Of The Auxiliary And Control Contacts":"M3","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":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Number Of Poles For Main Current Circuit":"3","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","For Auxiliary Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","operational current at AC-3e at 400 V rated value":"50 A","Size Of Contactor Can Be Combined Company-Specific":"S2","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":"690 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":"0.1 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"12.5 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$139.70","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/82c408fb92baca1edd49c405d3a9cc4f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=226061&mlfb=3RB3133-4UW1"},"ai":{"faq":[{"question":"What is the 3RB3133-4UW1's trip class range?","answer":"The trip class is adjustable among CLASS 5E, 10E, 20E, and 30E, allowing the relay to be tuned for different motor starting characteristics — from fast protection on short-cycle loads to longer thermal curves for high-inertia starts."},{"question":"What does the 'tripped' message on the 3RB3133-4UW1 mean?","answer":"The note for message 'tripped' indicates that the signaling contact (97/98) has changed state because the relay detected an overcurrent condition exceeding the upper current setting value by 3.5 times or more."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3133-4UW1","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/3RB3133-4UW1 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}}