{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RP2540-1BW30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RP2540-1BW30","canonicalUrl":"https://aoctrl.com/siemens/3RP2540-1BW30","factsUrl":"https://aoctrl.com/api/mcp/products/3RP2540-1BW30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RP2540-1BW30 multifunction timing relay, 12-240 V AC/DC supply, 5 A thermal current, 0.05-600 s adjustable, 22.5 mm DIN rail housing.","salesMarkdown":"## What it does on the DIN rail The Siemens 3RP2540-1BW30 is a SIRIUS multifunction timing relay in the 22.5 mm-wide DIN-rail housing, sitting on a standard 35 mm rail with screw-and-snap-on fastening so it lands in a control-cabinet slot next to other SIRIUS 3RP timers. ## Time range, output, and what the contact rating actually carries Time is adjustable from 0.05 s to 600 s, with the setting scale referenced against an initial value of 0.85 and a full-scale value of 1.1 — meaning the trim pots are read against a normalised scale, not against the absolute second count, and the panel-builder dials in the intended setpoint within that window. Settings are non-volatile, so the programmed setpoint survives a control-power blip; the function block listed here is delayed switching with two changeover outputs, no ON-delay, no OFF-delay, and no star-delta or pulse-shaping logic — it is a straightforward two-stage delayed switching timer. ## Panel-side mounting and wiring Mounting position is unrestricted (any), so the timer goes in vertically-packed cabinets without derating notes on the drawing; tightening torque on the screw terminals is 0.6 to 0.8 N·m, which matters when the same screwdriver is being used across the SIRIUS row to avoid cracking the housing. The terminal accepts solid conductors from 20 to 12 AWG and stranded from 20 to 14 AWG, covering the typical control-wire gauges run to a 5 A timer in a motor-starter bay.","metaTitle":"Siemens 3RP2540-1BW30 SIRIUS timing relay, 0.05–600 s","metaDescription":"Siemens 3RP2540-1BW30 SIRIUS multifunction timing relay, 12-240 V AC/DC coil, 5 A thermal, 0.05-600 s adjustable, DIN rail. Quoted to order against the BOM.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Time Delay Relays"],"specifications":{"Depth":"90 mm","Solid":"20 ... 12","Width":"22.5 mm","at DC":"12 ... 240 V","title":"3RP2540-1BW30","Height":"100 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","ON-delay":"No","Stranded":"20 ... 14","at 125 V":"0.2 A","at 240 V":"0.5 ms","at 250 V":"0.1 A","at 50 Hz":"12 ... 240 V","at 60 Hz":"12 ... 240 V","Backwards":"0 mm","Downwards":"0 mm","OFF delay":"No","At The Side":"0 mm","description":"Timing relay, electronic OFF delay without control signal or smooth passing make contact non-volatile 7 time ranges 0.05...600 s 12-240 V AC/DC, 2 change-over contacts at 50/60 Hz AC with LED, Screw terminal","Non-Volatile":"Yes","Relay Output":"Yes","Initial Value":"0.85","Pulse Delayed":"No","Pulse-Shaping":"No","Recovery Time":"250 ms","During Storage":"-40 ... +85 °C","Adjustable Time":"0.05 ... 600 s","Thermal Current":"5 A","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-40 ... +85 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.1","Delayed Switching":"2","Mounting Position":"any","Tightening Torque":"0.6 ... 0.8 N·m","additive ON-delay":"No","minimum ON period":"250 ms","Product Brand Name":"SIRIUS","Star-Delta Circuit":"No","Type Of Insulation":"Basic insulation","Degree Of Pollution":"3","Product Designation":"timing relay","protection class IP":"IP20","Adjustable Time Note":"minimum value at function N = 0.5 s","Passing Make Contact":"No","for AWG cables solid":"1x (20 ... 12), 2x (20 ... 14)","Design Of The Product":"rückfallverzögert ohne Steuersignal, nullspannungssicher, einschaltwischend","Instantaneous Contact":"0","Passing Break Contact":"No","Semi-Conductor Output":"No","Power Supply Influence":"1% in the whole voltage range to the set runtime","power loss [W] maximum":"2 W","OFF delay/instantaneous":"No","for AWG cables stranded":"1x (20 ... 12), 2x (20 ... 14)","Relative Repeat Accuracy":"1 %; +/-","Pulse Delayed/Instantaneous":"No","Pulse-Shaping/Instantaneous":"No","Substance Prohibitance (Date)":"09/12/2014","Material Of Switching Contacts":"AgSnO2","ON-delay/instantaneous contact":"No","Test Voltage For Isolation Test":"2.5 kV","additive ON-delay/instantaneous":"No","ON-delay/OFF-delay/instantaneous":"No","Control Supply Voltage Frequency 1":"50 ... 60 Hz","Relative Humidity During Operation":"10 ... 95 %","Star-Delta Circuit With Delay Time":"No","Passing Break Contact/Instantaneous":"No","Surge Voltage Resistance Rated Value":"4 000 V","EMC immunity according to IEC 61812-1":"corresponds to degree of severity 3","Flashing Symmetrically With Pulse Start":"No","due to burst according to IEC 61000-4-4":"2 kV network connection / 1 kV control connection","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"0.5 ... 4 mm²","Flashing Asymmetrically With Pulse Start":"No","Influence Of The Surrounding Temperature":"1% in the whole temperature range to the set runtime","Contact Reliability Of Auxiliary Contacts":"one incorrect switching operation of 100 million switching operations (17 V, 5 mA)","Product Extension Optional Remote Control":"No","Product Extension Required Remote Control":"No","Flashing Symmetrically With Interval Start":"No","Passing Make Contact/Instantaneous Contact":"No","Flashing Asymmetrically With Interval Start":"No","Design Of The Thread Of The Connection Screw":"M3","shock resistance according to IEC 60068-2-27":"11g / 15 ms","Retriggerable With Deactivated Control Signal":"No","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Switching Capacity Current With Inductive Load":"0.01 ... 3 A","operating frequency with 3RT2 contactor maximum":"5 000 1/h","vibration resistance according to IEC 60068-2-6":"10 ... 55 Hz / 0.35 mm","Retrotriggerable With Switched-On Control Signal":"No","EMC emitted interference according to IEC 61812-1":"ambience A (industrial sector)","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","electrostatic discharge according to IEC 61000-4-2":"4 kV contact discharge / 8 kV air discharge","At The Relay Outputs Switchover Delayed/Without Delay":"No","Flashing Symmetrically With Pulse Start/Instantaneous":"No","Relative Setting Accuracy Relating To Full-Scale Value":"5 %; +/-","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Flashing Symmetrically With Interval Start/Instantaneous":"No","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","Product Component Removable Terminal For Auxiliary And Control Circuit":"Yes","Retrotriggerable With Deactivated Control Signal/Instantaneous Contact":"No","Retrotriggerable With Switched-On Control Signal/Instantaneous Contact":"No","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$91.44 – $237.60","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c15654635b1892a0f7d74ce6c41e38ff.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=221438&mlfb=3RP2540-1BW30"},"ai":{"faq":[{"question":"What is the time range on 3RP2540-1BW30?","answer":"The adjustable time range on 3RP2540-1BW30 is 0.05 s to 600 s, set against a scale normalised to an initial value of 0.85 and a full-scale value of 1.1; the minimum ON period is 250 ms and recovery time is 250 ms, which puts the timer squarely in the interlock-and-sequencing class."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RP2540-1BW30","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/3RP2540-1BW30 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}}