{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RU2136-4HB0-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RU2136-4HB0-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RU2136-4HB0-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4HB0-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RU2136-4HB0-ZX95 thermal overload relay, size S2, Class 10, 690 V rated, 22 kW at 400 V, contactor-mount, screw terminals.","salesMarkdown":"It's the part that sits between your contactor and motor, watching current draw and tripping on overload before the winding insulation gives up. The \"ZX95\" suffix flags a special version with a \"Tripped\" message indication — meaning the relay's auxiliary contacts signal a trip state rather than just a reset state, which matters for PLC or HMI feedback on a line. The thermal bimetal design compensates for ambient temperature from -40 to +60 °C, so it doesn't drift on a hot summer day in an unventilated panel. Mounts directly onto the contactor via the \"contactor mounting\" fastening method — no DIN rail bracket needed, no extra wiring between the two. Sits in any position, which helps when you're cramming gear into a tight enclosure. Main circuit connections are screw-type terminals, accepting 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. Dimensions are 55 mm wide, 90 mm high, 105 mm deep — fits the standard S2 footprint. The M6 main contact screws and Pozidriv PZ2 terminal screws are what you'd expect on this frame size. The relay is rated for motor duty up to 22 kW at 400 V, 30 kW at 500 V, and 45 kW at 690 V — those are the AC-3e (squirrel-cage motor starting) values. At 480 V and 600 V, the maximum continuous current is 50 A. The auxiliary contacts handle 2 A at 24 V, 3 A at 120 V, and 1 A at 400 V — enough to drive a PLC input or a small indicator lamp, but not a contactor coil directly. Per-pole power dissipation is 5.2 W. In a multi-motor panel with several relays, that heat adds up — factor it into your enclosure thermal calculation, especially if the panel is sealed. Substance prohibitance date is October 15, 2014. No UL or CSA marks are listed in the spec record.","metaTitle":"Siemens 3RU2136-4HB0-ZX95 SIRIUS Thermal Overload Relay, Cla","metaDescription":"Siemens SIRIUS 3RU2136-4HB0-ZX95 thermal overload relay, size S2, Class 10 trip, 690V rated, 22kW at 400V. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Note":"for message \"Tripped\"","Depth":"105 mm","Width":"55 mm","Height":"90 mm","at 24 V":"2 A","at 60 V":"0.3 A","Per Pole":"5.2 W","at 110 V":"0.22 A","at 120 V":"3 A","at 125 V":"0.22 A","at 220 V":"0.11 A","at 230 V":"2 A","at 400 V":"1 A","Trip Class":"CLASS 10","Rated Value":"690 V","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-40 ... +70 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Contactor mounting","For Main Contacts":"M6","Mounting Position":"any","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"thermal overload relay","at 400 V rated value":"22 kW","at 480 V rated value":"50 A","at 500 V rated value":"30 kW","at 600 V rated value":"50 A","at 690 V rated value":"45 kW","Size Of Overload Relay":"S2","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-40 ... +60 °C","Design Of Screwdriver Shaft":"Diameter 5 ... 6 mm","Size Of The Screwdriver Tip":"Pozidriv PZ 2","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":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"50 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","For Auxiliary And Control Circuit":"screw-type terminals","Between Main And Auxiliary Circuit":"690 V","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Slide switch","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Of The Auxiliary And Control Contacts":"M3","Between Auxiliary And Auxiliary Circuit":"415 V","reference code according to IEC 81346-2":"F","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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","shock resistance according to IEC 60068-2-27":"8g / 11 ms","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","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, quick: 10 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","power loss [W] for rated value of the current at AC in hot operating state":"15.6 W","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"40 ... 50 A","Design Of The Miniature Circuit Breaker For Short-Circuit Protection Of The Auxiliary Switch Required":"6A (SCC less than equal to 0.5 kA; U less than equal to 260V)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c063c21d45bb79954523f24f487aef5c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=148019&mlfb=3RU2136-4HB0-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RU2136-4HB0-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What does the \"Tripped\" message indication mean?","answer":"The ZX95 suffix means the relay's auxiliary contacts are wired to signal a \"Tripped\" state — the normally-open contact closes when the relay trips, giving a positive indication to a PLC or HMI. Standard relays often only signal the reset state."},{"question":"Does this relay mount on a DIN rail or directly on a contactor?","answer":"It mounts directly on the contactor — the fastening method is listed as \"contactor mounting.\" No DIN rail adapter is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RU2136-4HB0-ZX95","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/3RU2136-4HB0-ZX95 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}}