{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RB2016-2PD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RB2016-2PD0","canonicalUrl":"https://aoctrl.com/siemens/3RB2016-2PD0","factsUrl":"https://aoctrl.com/api/mcp/products/3RB2016-2PD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS solid-state overload relay, 3RB2016-2PD0, CLASS 20E, 3 poles, 1 NC auxiliary contact, ATEX Ex II (2) GD, current production.","salesMarkdown":"The Siemens 3RB2016-2PD0 is a SIRIUS solid-state overload relay — three-pole, CLASS 20E, with one NC auxiliary contact and screw-type main terminals plus spring-loaded auxiliary/control terminals. CLASS 20E means the relay will trip within 20 seconds at 7.2× the motor's full-load current, a standard protection curve for general-purpose induction motors driving pumps, fans, and conveyors where start-up transients are moderate. The ATEX approval (PTB 06 ATEX 3001 Ex II (2) GD) qualifies it for use in potentially explosive atmospheres as a protective device associated with category 2 equipment — a key check for panel builders in Zone 1 or Zone 21 environments. ## Auxiliary contact ratings and wiring The single NC auxiliary contact is rated for 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V — these are the continuous thermal current values, so the contact can handle the typical PLC input or contactor coil draw at those voltages without derating. The spring-loaded terminals accept 2× (0.25 … 1.5 mm²) solid or finely stranded wire, or 2× AWG 24–16 for the auxiliary circuit; the main circuit uses screw-type terminals. That split means the power wiring is torqued down and the control wiring is a quick push-in — a common panel-build workflow that saves time on the auxiliary side. Fastening method is contactor mounting — it clips directly onto the front of a corresponding SIRIUS contactor (no DIN rail needed for the relay itself), which saves one DIN-rail slot per motor starter combo. The relay itself is 45 mm wide, 64 mm tall, and 73 mm deep. Shock resistance is 15g / 11 ms, adequate for most industrial machinery. ## EMC and surge robustness Surge voltage resistance is rated at 6 kV, and the unit withstands burst transients of 2 kV on power ports and 1 kV on signal ports per IEC 61000-4-4, severity level 3. That level of immunity is typical for industrial control panels connected to a 400 V distribution network without dedicated surge protection on every branch — it means the relay won't nuisance-trip or latch up from nearby contactor switching or VFD PWM noise.","metaTitle":"Siemens 3RB2016-2PD0 SIRIUS solid-state overload relay, CLAS","metaDescription":"Siemens SIRIUS 3RB2016-2PD0 solid-state overload relay, CLASS 20E, ATEX Ex II (2) GD, 3 poles, 1 NC auxiliary contact, current production. Sourced to order.","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","For Auxiliary And Control Circuit":"spring-loaded terminals","Relative Humidity During Operation":"100 %","Surge Voltage Resistance Rated Value":"6 kV","for 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":"1 ... 4 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=160930&mlfb=3RB2016-2PD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RB2016-2PD0/alternatives.json"},"ai":{"faq":[{"question":"What auxiliary contact ratings does this relay have?","answer":"The single NC auxiliary contact is rated 2 A at 24 V, 4 A at 120 V, and 3 A at 230 V. These are the continuous thermal current values, sufficient for most PLC inputs and contactor coils."},{"question":"Does the 3RB2016-2PD0 have ATEX approval?","answer":"Yes, it carries PTB 06 ATEX 3001 Ex II (2) GD approval, qualifying it as a protective device associated with category 2 equipment for use in potentially explosive gas and dust atmospheres."},{"question":"What wire sizes does the auxiliary terminal accept?","answer":"The spring-loaded auxiliary terminals accept 2× (0.25 … 1.5 mm²) solid or finely stranded wire, or 2× AWG 24–16."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RB2016-2PD0","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/3RB2016-2PD0 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}}