{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2153-4FX2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2153-4FX2","canonicalUrl":"https://aoctrl.com/siemens/3RB2153-4FX2","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2153-4FX2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RB2153-4FX2 solid-state overload relay, S6 size, 200 A rated operational current, adjustable trip classes 5E/10E/20E/30E, 1000 V AC-3e, for contactor mounting or stand-alone installation.","salesMarkdown":"## 200 A solid-state overload relay for motor protection The Siemens 3RB2153-4FX2 is a SIRIUS S6-size solid-state overload relay rated for 200 A operational current at up to 1000 V AC-3e. It protects three-phase motors by monitoring current through straight-through transformers and tripping on overload. Trip class is field-adjustable among CLASS 5E, 10E, 20E, and 30E. This lets you match the relay's thermal memory to the motor's starting profile — a high-inertia load like a centrifuge needs 20E or 30E to avoid nuisance trips during acceleration, while a pump or compressor can run on 10E. ## Electronic design and auxiliary contact ratings The overload release is electronic rather than bimetallic. This means no ambient-temperature tracking error — the relay compensates for -25 to +60 °C operating ambient and holds its trip curve across the range, unlike a thermal bimetal that drifts with panel heat. These cover the common PLC input and relay coil voltages found in most panels. The relay trips when motor current exceeds the upper setting by a factor of 3.5. This threshold is high enough to ride through brief inrush but catches sustained overloads before the motor insulation degrades. ## Panel fit and mounting options The 3RB2153-4FX2 measures 120 mm wide, 119 mm high, and 155 mm deep. It mounts directly onto a contactor or as a stand-alone unit on the DIN rail. The S6 frame size is the largest in the SIRIUS overload relay range, sized for the 200 A current path. The main current path uses straight-through transformers — no looping the motor leads through the relay body, which saves panel wiring time. Rated for 15g / 11 ms shock and 1-500 Hz vibration per IEC 60068-2-27. Sourced through independent distribution channels. No stock-holding claim; quoted to order per RFQ.","metaTitle":"Siemens 3RB2153-4FX2 SIRIUS solid-state overload relay","metaDescription":"Siemens 3RB2153-4FX2 SIRIUS solid-state overload relay, 200 A rated operational current, adjustable trip classes 5E-30E. 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":"155 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"120 mm","title":"3RB2153-4FX2","Height":"119 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","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 50...200 A for motor protection Size S6, CLASS 5...30E Contactor mounting/stand-alone installation Main circuit: straight-through transformer Auxiliary circuit: Spring-type terminal Manual-Automatic-Reset Internal ground fault detection","During Storage":"-40 ... +80 °C","Thermal Current":"200 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +80 °C","Fastening Method":"Contactor mounting/stand-alone installation","Shock Resistance":"15g / 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":"200 A","at 600 V rated value":"200 A","Size Of Overload Relay":"S6","For Main Current Circuit":"straight-through transformers","Temperature Compensation":"-25 ... +60 °C","according to IEC 60068-2-27":"15g / 11 ms","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"07/01/2006","Design Of The Auxiliary Switch":"integrated","Design Of The Overload Release":"electronic","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"200 A","for AC motors at 500 V at 50 Hz":"30 ... 132 kW","for AC motors at 690 V at 50 Hz":"55 ... 160 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: 355 A, Class L: 601 A","at AWG cables for auxiliary contacts":"2x (24 ... 16)","for 3-phase motors at 400 V at 50 Hz":"30 ... 90 kW","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":"200 A","Size Of Contactor Can Be Combined Company-Specific":"S6","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","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"50 ... 200 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ccddc356d218916b1a11715c2325c1b1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=136511&mlfb=3RB2153-4FX2"},"ai":{"faq":[{"question":"What does the note 'for message tripped' mean on the 3RB2153-4FX2?","answer":"The note indicates that the auxiliary contact position signals a 'tripped' status — the relay's integrated auxiliary switch changes state when the overload release operates, providing a discrete signal to a PLC or indicator lamp that the motor has been disconnected due to overload."},{"question":"What is the depth of the 3RB2153-4FX2?","answer":"The depth is 155 mm. Combined with the 120 mm width and 119 mm height, this relay occupies a standard S6 footprint that fits most 200 A motor starter assemblies."},{"question":"What trip classes can the 3RB2153-4FX2 be set to?","answer":"The trip class is adjustable among CLASS 5E, 10E, 20E, and 30E. This covers fast-acting protection for short-start motors (5E/10E) through high-inertia loads requiring extended acceleration (20E/30E)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2153-4FX2","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/3RB2153-4FX2 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}}