{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2016-2SD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2016-2SD0","canonicalUrl":"https://aoctrl.com/siemens/3RB2016-2SD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2016-2SD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3-pole, CLASS 20E trip class, contactor mounting, screw-type main terminals, spring-loaded aux/control terminals, ATEX Ex II (2) GD.","salesMarkdown":"The Siemens 3RB2016-2SD0 is a SIRIUS solid-state overload relay for three-phase motor circuits, rated CLASS 20E trip class. That CLASS 20E rating means it allows a 20-second cold-start locked-rotor time before tripping — sized for standard induction motors with moderate acceleration profiles like fans or centrifugal pumps, where the inrush decays within that window without nuisance tripping. It mounts directly onto a contactor (contactor mounting), not a DIN rail — so the panel layout needs the contactor footprint already in place. ## ATEX and environmental rating Certified PTB 06 ATEX 3001 Ex II (2) GD — this relay is approved for use in potentially explosive atmospheres (gas and dust) as an associated apparatus, suitable for Zone 1/2 gas and Zone 21/22 dust areas when installed in a certified enclosure. Shock resistance 15g / 11 ms. Surge voltage resistance rated 6 kV, with burst immunity per IEC 61000-4-4 severity 3 (2 kV on power ports, 1 kV on signal ports). The auxiliary contacts are rated for switching at multiple control voltages: 2 A at 24 V, 4 A at 120 V, 3 A at 230 V, with lower ratings at 60 V (0.55 A), 110 V (0.3 A), 125 V (0.3 A), and 220 V (0.11 A). These are the maximum switching currents — useful when sizing the control transformer or verifying the relay can drive the PLC input or contactor coil it feeds. ## Dimensions and mounting clearances Dimensions: 45 mm width, 64 mm height, 73 mm depth. Mounting position any. That zero-clearance on four sides means it can be packed tight against other components in the panel — useful when retrofitting into an existing contactor assembly where space is already allocated.","metaTitle":"Siemens 3RB2016-2SD0 SIRIUS Solid-State Overload Relay, CLAS","metaDescription":"Siemens SIRIUS 3RB2016-2SD0 solid-state overload relay, CLASS 20E trip, 3-pole, contactor mounting, ATEX Ex II (2) GD. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Overload Relays"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 1.5 mm²)","Width":"45 mm","Height":"64 mm","Upwards":"0 mm","at 24 V":"2 A","at 60 V":"0.55 A","Forwards":"0 mm","Per Pole":"0.02 W","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 20E","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":"2x (18 ... 14)","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":"S00","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":"3 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=265699&mlfb=3RB2016-2SD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2016-2SD0/alternatives.json"},"ai":{"faq":[{"question":"What does CLASS 20E mean on this overload relay?","answer":"CLASS 20E means the relay allows a 20-second cold-start locked-rotor time before tripping. That suits standard induction motors with moderate acceleration loads like fans and centrifugal pumps, where the inrush current decays within that window without causing a nuisance trip."},{"question":"Where can I buy the 3RB2016-2SD0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm position."},{"question":"What compliance certifications does the 3RB2016-2SD0 carry?","answer":"It carries ATEX certification PTB 06 ATEX 3001 Ex II (2) GD for explosive atmospheres. It also meets IEC 61000-4-4 burst immunity severity 3 and has a surge voltage resistance of 6 kV."},{"question":"What are the terminal types on the 3RB2016-2SD0?","answer":"The main current circuit uses screw-type terminals; the auxiliary and control circuit uses spring-loaded terminals. Wire sizes: 2x (0.25... 1.5 mm²) solid or finely stranded with ferrule for aux/control, and 2x (18... 14 AWG) for main contacts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2016-2SD0","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/3RB2016-2SD0 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}}