{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RP1540-2AB31","brand":"Siemens","brandSlug":"siemens","productSlug":"3RP1540-2AB31","canonicalUrl":"https://aoctrl.com/siemens/3RP1540-2AB31","factsUrl":"https://aoctrl.com/api/mcp/products/3RP1540-2AB31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS timing relay, 3RP1540-2AB31, 24 V DC, adjustable time 0.05–600 s, 5 A thermal current, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The adjustable time range spans 0.05 to 600 s, set via a front-panel potentiometer or DIP switches depending on variant — this unit carries a 0.85 initial value multiplier and 1.1 full-scale factor, meaning the actual delay equals the dial setting times these coefficients. Recovery time between cycles is 150 ms, and the minimum ON period is 200 ms, so it won't retrigger on fast transients. The relay contact is rated 1 A at 24 V DC, 0.2 A at 125 V DC, and 0.1 A at 250 V AC/DC — these are the switching limits, not the continuous carry current. The thermal current (Ith) is 5 A, which governs the continuous current through the contact path when the relay is not switching. For a 24 V DC control circuit, the 1 A switching rating is the number to check against your load's inrush and breaking requirements. The 22.5 mm width fits standard enclosure rail spacing; any mounting position is allowed. Screw terminals accept 2 x (24–16 AWG) solid or stranded conductors. The 22.5 mm width and 91 mm depth fit standard 35 mm DIN rail enclosures; no additional clearance is required in any direction (0 mm spacing upwards, downwards, forwards, backwards, and to the side). Basic insulation with pollution degree 3 suits industrial control panels where conductive dust or humidity is present.","metaTitle":"Siemens 3RP1540-2AB31 SIRIUS Timing Relay, 0.05–600 s, 24 V","metaDescription":"Siemens SIRIUS 3RP1540-2AB31 timing relay, 24 V DC coil, adjustable 0.05–600 s delay, 5 A thermal current. DIN rail mount. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Time Delay Relays"],"specifications":{"Depth":"91 mm","Solid":"24 ... 16","Width":"22.5 mm","Height":"84 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","ON-delay":"No","Stranded":"24 ... 16","at 125 V":"0.2 A","at 250 V":"0.1 A","Backwards":"0 mm","Downwards":"0 mm","OFF delay":"No","At The Side":"0 mm","Non-Volatile":"No","Relay Output":"Yes","Initial Value":"0.85","Pulse Delayed":"No","Pulse-Shaping":"No","Recovery Time":"150 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":"1","Mounting Position":"any","additive ON-delay":"No","at DC rated value":"24 V","minimum ON period":"200 ms","Product Brand Name":"SIRIUS","Star-Delta Circuit":"No","Type Of Insulation":"Basic insulation","Degree Of Pollution":"3","Product Designation":"timing relay","at AWG cables solid":"2x (24 ... 16)","protection class IP":"IP20","Passing Make Contact":"No","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Instantaneous Contact":"0","Passing Break Contact":"No","Semi-Conductor Output":"No","Power Supply Influence":"±1 %","at AWG cables stranded":"2x (24 ... 16)","power loss [W] maximum":"2 W","OFF delay/instantaneous":"No","Relative Repeat Accuracy":"1 %","Pulse Delayed/Instantaneous":"No","Pulse-Shaping/Instantaneous":"No","Substance Prohibitance (Date)":"05/28/2009","Material Of Switching Contacts":"AgNi","ON-delay/instantaneous contact":"No","Test Voltage For Isolation Test":"2 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":"EN 61000-6-2","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":"0.3 ... 1.5 mm²","Flashing Asymmetrically With Pulse Start":"No","Influence Of The Surrounding Temperature":"±5 %","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","Finely Stranded Without Core End Processing":"0.3 ... 1.5 mm²","Flashing Asymmetrically With Interval Start":"No","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","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":"EN 61000-6-4(3)","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","contact rating of auxiliary contacts according to UL":"R300 / B300","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":"spring-loaded 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":"$127.00","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/74394ef6d1e80600cb3fe262a0e9a652.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=316519&mlfb=3RP1540-2AB31","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RP1540-2AB31/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RP1540-2AB31 and what is the lead time?","answer":"The 3RP1540-2AB31 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock or lead-time figures are published here."},{"question":"What is the adjustable time range on this timing relay?","answer":"The adjustable time range is 0.05 to 600 seconds, set via front-panel controls. The actual delay equals the dial setting multiplied by the initial value factor (0.85) and full-scale factor (1.1)."},{"question":"What are the contact ratings for 3RP1540-2AB31?","answer":"The relay output is rated 1 A at 24 V DC, 0.2 A at 125 V DC, and 0.1 A at 250 V AC/DC. The thermal continuous current (Ith) is 5 A."},{"question":"Does 3RP1540-2AB31 mount on DIN rail?","answer":"Yes, it snaps onto 35 mm DIN rail using the integrated latch, and can also be screw-mounted. No clearance is needed in any direction around the housing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RP1540-2AB31","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/3RP1540-2AB31 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}}