{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB3036-1UB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB3036-1UB0","canonicalUrl":"https://aoctrl.com/siemens/3RB3036-1UB0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB3036-1UB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB3036-1UB0 solid-state overload relay, size S2, 50 A thermal current, Class 10E trip class, 690 V rated, contactor mounting, integrated auxiliary contacts with message 'tripped' signaling.","salesMarkdown":"## Class 10E Solid-State Overload — What the Ratings Mean for Motor Protection The 3RB3036-1UB0 is a SIRIUS solid-state overload relay with a Class 10E trip class, meaning it will trip within 10 seconds at 7.2× the current setting — standard for protecting standard squirrel-cage motors during start-up where the acceleration time stays under 10 seconds. Rated thermal current Ith is 50 A at both 480 V and 600 V, so the same unit covers 480 V and 600 V motor branches without derating the continuous current. The maximum rated operational voltage is 690 V at AC-3e duty, which covers 400 V and 690 V line-to-line systems common in European and export panels. ## Auxiliary Contact Ratings — Sizing the Control Circuit The integrated auxiliary switch is rated 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V — these are the contact ratings for the 'tripped' signaling circuit, not the main power path. At 60 V the contact is rated 0.55 A, at 110 V it is 0.3 A, at 125 V it is 0.3 A, and at 220 V it is 0.11 A — the DC ratings drop significantly with voltage, so confirm the control voltage type before wiring. ## Mounting and Panel Fit — Contactor-Mount Size S2 Size S2 overload relay, 55 mm wide × 99 mm high × 104 mm deep, designed for direct contactor mounting — it fastens onto the contactor without extra DIN-rail space, keeping the panel layout tight. Mounting position is any orientation, which simplifies installation in crowded enclosures where vertical or horizontal mounting is the only option. Main circuit terminals accept solid 1×(0.5…4 mm²) or 2×(0.5…2.5 mm²), and stranded up to 2×(10…35 mm²) or 1×50 mm² — the screw-type terminals use a Pozidriv PZ 2 driver with a 5 to 6 mm shaft diameter. ## Environmental and Mechanical Ruggedness Operating temperature range is -25 to +60 °C with temperature compensation across the same span, so the trip curve stays accurate in hot panel ambient without manual adjustment. Shock resistance is 15 g / 11 ms per IEC 60068-2-27, though the signaling contact in the 'tripped' position is rated 8 g / 11 ms — the main relay body handles higher shock than the auxiliary contact when actuated. Vibration resistance covers 1–6 Hz at 15 mm amplitude and 6–500 Hz at 20 m/s² over 10 cycles — suitable for mounting on contactors driving pumps and compressors in industrial environments. Storage and transport temperature range is -40 to +80 °C, so the relay can sit in unheated warehouses or shipping containers without damage. ## Lifecycle and Sourcing — Active Production, No Obsolescence Worry The substance prohibitance date of October 15, 2014 confirms RoHS and REACH compliance — this part meets EU substance restrictions for current production. Sourced to order through independent distribution channels; availability and current pricing confirmed at RFQ against your BOM quantity.","metaTitle":"Siemens 3RB3036-1UB0 SIRIUS Solid-State Overload Relay","metaDescription":"Siemens 3RB3036-1UB0 SIRIUS solid-state overload relay, 50 A thermal current, Class 10E trip class, 690 V rated. Active production, sourced to order.","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":"3RB3036-1UB0","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 10E","Rated Value":"690 V","description":"Overload relay 12.5...50 A Electronic For motor protection Size S2, Class 10E 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","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","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":"$88.90","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1ab9dd10f2c30bf92436861719e395e7.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=17102&mlfb=3RB3036-1UB0"},"ai":{"faq":[{"question":"What does the note 'for message tripped' mean on the 3RB3036-1UB0?","answer":"The note 'for message tripped' indicates this variant has an integrated auxiliary contact that signals when the overload relay has tripped — it is a signaling version, not a basic overload relay without status output."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB3036-1UB0","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/3RB3036-1UB0 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}}