{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RP1540-1AB31","brand":"Siemens","brandSlug":"siemens","productSlug":"3RP1540-1AB31","canonicalUrl":"https://aoctrl.com/siemens/3RP1540-1AB31","factsUrl":"https://aoctrl.com/api/mcp/products/3RP1540-1AB31","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS timing relay, 3RP1540-1AB31, 24 V DC, adjustable 0.05-600 s ON-delay, 5 A thermal current, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RP1540-1AB31 is a SIRIUS timing relay with a single adjustable ON-delay range from 0.05 to 600 seconds, triggered at 24 V DC. Its 5 A thermal current rating (Ith) governs the contact capacity for resistive loads at the rated voltage — at 24 V DC it switches 1 A, derating to 0.2 A at 125 V and 0.1 A at 250 V. The recovery time of 150 ms means the relay resets fast enough for rapid-cycle applications like conveyor indexing or pump sequencing. The 22.5 mm width and 91 mm depth fit standard sub-distribution boards and control panels; clearance at all sides is 0 mm, so it can be packed tight against adjacent devices. Terminals accept 20–14 AWG solid or stranded wire; tighten to 0.8–1.2 N·m.","metaTitle":"Siemens 3RP1540-1AB31 SIRIUS Timing Relay, 0.05-600 s, 5 A","metaDescription":"Siemens 3RP1540-1AB31 SIRIUS timing relay. Adjustable 0.05-600 s ON-delay, 5 A thermal current, 24 V DC. DIN-rail mount. Current production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Time Delay Relays"],"specifications":{"Depth":"91 mm","Solid":"20 ... 14","Width":"22.5 mm","Height":"83 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 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","Tightening Torque":"0.8 ... 1.2 N·m","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","protection class IP":"IP20","Passing Make Contact":"No","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","for AWG cables solid":"2x (20 ... 14)","Instantaneous Contact":"0","Passing Break Contact":"No","Semi-Conductor Output":"No","Power Supply Influence":"±1 %","power loss [W] maximum":"2 W","OFF delay/instantaneous":"No","for AWG cables stranded":"2x (20 ... 14)","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":"0.5 ... 2.5 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","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","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":"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":"$125.00","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=384482&mlfb=3RP1540-1AB31","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RP1540-1AB31/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RP1540-1AB31 and how do I get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 3RP1540-1AB31's adjustable time range?","answer":"The ON-delay is adjustable from 0.05 to 600 seconds, set via a front-panel potentiometer or DIP switches (no digital display)."},{"question":"What are the contact ratings at different voltages?","answer":"At 24 V DC it switches 1 A; at 125 V DC it switches 0.2 A; at 250 V DC it switches 0.1 A. The thermal current (Ith) is 5 A."},{"question":"Will 3RP1540-1AB31 drop into a panel specified around 5SJ3140-7?","answer":"No — 5SJ3140-7 is a miniature circuit breaker, not a timing relay. The 3RP1540-1AB31 serves a completely different function (time-delayed switching) and occupies a different DIN-rail footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RP1540-1AB31","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/3RP1540-1AB31 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}}