{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3036-2UB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3036-2UB0","canonicalUrl":"https://aoctrl.com/siemens/3RB3036-2UB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3036-2UB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB3036-2UB0 solid-state overload relay, CLASS 20E, 50 A thermal current, 690 V, screw terminals, contactor mounting.","salesMarkdown":"The Siemens 3RB3036-2UB0 is a SIRIUS solid-state overload relay. It's a Size S2 unit with a CLASS 20E trip curve — meaning it lets a motor draw locked-rotor current for up to 20 seconds before tripping. That's the standard protection for standard-start induction motors driving pumps, fans, or conveyors where the load doesn't need a fast trip on stall. Rated thermal current is 50 A continuous, and it's rated for use on systems up to 690 V. At 480 V and 600 V, the full 50 A rating holds. That covers a solid range of North American and IEC motor full-load currents up to about 25 kW on a 400 V line. The integrated auxiliary contact is wired as a normally-closed 'tripped' signal. The note says 'for message tripped' — that's the contact that opens when the relay trips, giving your PLC or annunciator a clean status. It's rated 4 A at 120 V and 3 A at 230 V, so it'll drive a small relay or input directly. Mounts directly onto the contactor — no DIN rail needed. The fastening method is 'contactor mounting', so it clips onto the front of a matching SIRIUS contactor. That saves a DIN-rail slot and keeps the power wiring short. Main circuit terminals are M6 screw-type, accepting 1x 50 mm² stranded or 2x (10 to 35 mm²) stranded. That's heavy wire for a 50 A device — lets you land the motor leads without adapters. Control terminals take 0.5 to 4 mm² solid or 0.5 to 2.5 mm² stranded. Use a PZ2 Pozidriv screwdriver with a 5 to 6 mm shaft diameter. Dimensions are 55 mm wide, 99 mm high, 104 mm deep. That's a compact footprint for a 50 A relay — fits easily in a shallow enclosure. ## Environmental toughness Rated for the grease and grit of a real motor control center. Shock resistance is 15g for 11 ms, and it handles vibration from 1 to 500 Hz. That's enough for a lube route or a vibrating conveyor line — it won't trip from mechanical chatter. RoHS compliance date is October 15, 2014 — it meets the EU substance restrictions for new installations.","metaTitle":"Siemens 3RB3036-2UB0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens 3RB3036-2UB0 SIRIUS solid-state overload relay, CLASS 20E, 50 A thermal current, 690 V rated. Screw terminals, contactor mounting. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"tripped\"","Depth":"104 mm","Solid":"1x (0.5 ... 4 mm²), 2x (0.5 ... 2.5 mm²)","Width":"55 mm","title":"3RB3036-2UB0","Height":"99 mm","at 24 V":"2 A","at 60 V":"0.55 A","Per Pole":"0.6 W","Stranded":"2x (10 ... 35 mm²), 1x 50 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","Trip Class":"CLASS 20E","Rated Value":"690 V","description":"Overload relay 12.5...50 A Electronic For motor protection Size S2, Class 20E Contactor mounting Main circuit: Screw Auxiliary circuit: Screw Manual-Automatic-Reset","During Storage":"-40 ... +80 °C","Thermal Current":"50 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting","Shock Resistance":"15g / 11 ms","For Main Contacts":"M6","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":"screw-type terminals","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 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","for 3-phase motors at 400 V at 50 Hz":"7.5 ... 22 kW","Of The Auxiliary And Control Contacts":"M3","for AWG cables for auxiliary contacts":"1x (20 ... 14), 2x (20 ... 14)","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","For Main Contacts With Screw-Type Terminals":"3 ... 4.5 N·m","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","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":"1.8 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"12.5 ... 50 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$104.14","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/df0e8e41baa127b62a6fdc4737fe9449.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=293829&mlfb=3RB3036-2UB0"},"ai":{"faq":[{"question":"What does the 'for message tripped' note mean?","answer":"It means the integrated auxiliary contact is wired as a normally-closed signal that opens when the overload relay trips. That contact carries 4 A at 120 V or 3 A at 230 V, suitable for a PLC input or pilot light."},{"question":"What are the main circuit terminal sizes?","answer":"The main terminals are M6 screw-type. They accept 1x 50 mm² stranded cable, or 2x 10 to 35 mm² stranded. Control terminals take 0.5 to 4 mm² solid or 0.5 to 2.5 mm² stranded."},{"question":"Does the 3RB3036-2UB0 mount on a DIN rail?","answer":"No. It mounts directly onto a matching SIRIUS contactor. That saves panel space and keeps power wiring short."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3036-2UB0","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/3RB3036-2UB0 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}}