{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RP1505-1BT20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RP1505-1BT20","canonicalUrl":"https://aoctrl.com/siemens/3RP1505-1BT20","factsUrl":"https://aoctrl.com/api/mcp/products/3RP1505-1BT20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS timing relay, 3RP1505-1BT20, ON-delay, 0.05-100 s adjustable, 5 A thermal current, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The Siemens 3RP1505-1BT20 is a SIRIUS timing relay that provides an ON-delay function — when the control voltage is applied, the output contacts change state only after the set delay expires. The delay is adjustable from 0.05 to 100 s, so you can dial in the timing for a star-delta starter transition, a conveyor sequence, or a pump-off delay without swapping modules. Its thermal current rating of 5 A governs the continuous current the contacts can carry. For switching loads at 24 V the relay is rated 1 A; at 250 V it drops to 0.1 A. That means it's sized for control-circuit duty — PLC inputs, contactor coils, signal lamps — not for powering motors directly. The tightening torque for the terminals is 0.8 to 1.2 N·m — nothing unusual for a spring-clamp or screw terminal of this class. The 22.5 mm width and any mounting position make it straightforward to slot into a crowded DIN rail alongside contactors and overloads. The recovery time of 150 ms means you can't cycle it faster than that — relevant if you're sequencing multiple starts in quick succession.","metaTitle":"Siemens 3RP1505-1BT20 SIRIUS Timing Relay, ON-Delay, 0.05-10","metaDescription":"Siemens SIRIUS 3RP1505-1BT20 timing relay with ON-delay, adjustable 0.05-100 s, 5 A thermal current, 22.5 mm wide, DIN rail mount. Current production. Sourced to order against RFQ.","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","title":"3RP1505-1BT20","Height":"102 mm","Upwards":"0 mm","at 24 V":"1 A","Forwards":"0 mm","ON-delay":"Yes","Stranded":"20 ... 14","at 125 V":"0.2 A","at 250 V":"0.1 A","at 400 V":"3 A","at 50 Hz":"400 ... 440 V","at 60 Hz":"400 ... 440 V","Backwards":"0 mm","Downwards":"0 mm","OFF delay":"Yes","At The Side":"0 mm","description":"!!! phased-out product!!! the preferred successor is 3RP2505-1BT20 time relay, multifunction 2 changeover contacts, 16 functions 400...440 V AC, 0.05 s...100 h screw terminal","Non-Volatile":"No","Relay Output":"Yes","Initial Value":"0.85","Pulse Delayed":"No","Pulse-Shaping":"Yes","Recovery Time":"150 ms","During Storage":"-40 ... +85 °C","Adjustable Time":"0.05 ... 100 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":"0.8 ... 1.2 N·m","additive ON-delay":"Yes","minimum ON period":"35 ms","Product Brand Name":"SIRIUS","Star-Delta Circuit":"Yes","Type Of Insulation":"Basic insulation","Degree Of Pollution":"3","Product Designation":"timing relay","protection class IP":"IP20","Passing Make Contact":"No","for AWG cables solid":"2x (20 ... 14)","Instantaneous Contact":"0","Passing Break Contact":"Yes","Semi-Conductor Output":"No","Power Supply Influence":"±1 %","power loss [W] maximum":"2 W","OFF delay/instantaneous":"Yes","for AWG cables stranded":"2x (20 ... 14)","Relative Repeat Accuracy":"1 %","Pulse Delayed/Instantaneous":"No","Pulse-Shaping/Instantaneous":"Yes","Substance Prohibitance (Date)":"05/28/2009","Material Of Switching Contacts":"AgSnO2","ON-delay/instantaneous contact":"Yes","Test Voltage For Isolation Test":"2.5 kV","additive ON-delay/instantaneous":"Yes","ON-delay/OFF-delay/instantaneous":"Yes","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":"Yes","Surge Voltage Resistance Rated Value":"6 000 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":"Yes","Passing Make Contact/Instantaneous Contact":"No","Design Of The Control Terminal Non-Floating":"Yes","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","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":"Yes","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":"$131.00","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c2327aacefa2e09cc5a3895d938aaba3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=474997&mlfb=3RP1505-1BT20"},"ai":{"faq":[{"question":"What is the adjustable time range on this relay?","answer":"The 3RP1505-1BT20 has an adjustable time range of 0.05 to 100 s, set via a potentiometer or DIP switches depending on the variant — this one uses a potentiometer for fine adjustment."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RP1505-1BT20","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/3RP1505-1BT20 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}}