{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2133-4UD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2133-4UD0","canonicalUrl":"https://aoctrl.com/siemens/3RB2133-4UD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2133-4UD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2133-4UD0 solid-state overload relay, 3-pole, adjustable trip class 5E/10E/20E/30E, screw-type main terminals, spring-loaded auxiliary terminals, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2133-4UD0 is a SIRIUS solid-state overload relay for three-phase motor protection. It mounts directly to a contactor (contactor mounting per the specification) and provides adjustable trip classes 5E, 10E, 20E, and 30E, letting you match the thermal curve to the motor start profile — a 5E setting for fast-starting pumps, 30E for high-inertia loads like centrifuges. Three poles for the main current circuit, with screw-type terminals accepting 1 x 18–2 AWG or 2 x 4 AWG max (finely stranded 1–35 mm²). The auxiliary and control circuit uses spring-loaded terminals (2 x 24–16 AWG, solid 2 x 0.25–1.5 mm²). This terminal split is common on SIRIUS overloads: the power path gets a high-torque screw clamp for vibration resistance, while the signal/aux side gets tool-less spring cages for faster wiring. Surge voltage resistance rated at 6 kV, with burst immunity per IEC 61000-4-4 severity 3 (2 kV on power ports, 1 kV on signal ports). That places it in the same noise-immunity class as the contactor it mounts to — no additional suppression needed for standard industrial panels. The auxiliary contact ratings cover both AC and DC control voltages: 4 A at 120 V AC, 3 A at 230 V AC, 2 A at 24 V DC, 0.55 A at 60 V DC, 0.3 A at 125 V DC, and 0.11 A at 220 V DC. These are the make/break capacities for the N/O and N/C contacts feeding the PLC input or holding circuit. Operating temperature range -25 to +60 °C, storage and transport -40 to +80 °C, with 100 % relative humidity during operation. Shock resistance 15g / 11 ms. Mounting position any.","metaTitle":"Siemens 3RB2133-4UD0 SIRIUS solid-state overload relay, 3-po","metaDescription":"Siemens 3RB2133-4UD0 SIRIUS solid-state overload relay, 3-pole, adjustable trip class 5E/10E/20E/30E, screw main terminals, spring-loaded aux, ATEX Ex II (2) GD, current production","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"109 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"55 mm","Height":"92 mm","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","Per Pole":"0.02 W","Stranded":"2x (max. 25 mm²), 1 ... 35 mm²","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","Backwards":"0 mm","Downwards":"0 mm","Trip Class":"CLASS 5E, 10E, 20E and 30E adjustable","At The Side":"6 mm","During Storage":"-40 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Type Of Protection":"PTB 06 ATEX 3001 Ex II (2) GD","Product Designation":"solid-state overload relay","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"07/01/2006","at AWG cables for main contacts":"2 x (max. 4), 1 x (18 ... 2)","For Auxiliary And Control Circuit":"spring-loaded terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (24 ... 16)","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","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":"S2","electrostatic discharge according to IEC 61000-4-2":"6 kV contact discharge / 8 kV air discharge","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","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":"0.05 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"12.5 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$129.62","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=461615&mlfb=3RB2133-4UD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2133-4UD0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RB2133-4UD0?","answer":"The depth is 109 mm, width 55 mm, height 92 mm. Zero clearance required upwards, forwards, backwards, and downwards; 6 mm clearance at the side."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2133-4UD0","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/3RB2133-4UD0 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}}