{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1HA30","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1HA30","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1HA30","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1HA30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1HA30 auxiliary switch block, 3 NO contacts, screw-type terminals, 10 A maximum, snap-on mounting, for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"## Front-Mounted Auxiliary Block for 3RT2/3RH2 The 3RH2911-1HA30 is a front-mounted auxiliary switch block that snaps onto Siemens 3RT2 contactors and 3RH2 contactor relays, adding three normally-open (NO) instantaneous contacts. It uses screw-type terminals and accepts 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) conductors per clamp, or 2x (20...16) and 2x (18...14) AWG. Part of the SIRIUS product brand, this block is rated for a mechanical service life of 10 million switching cycles typical, with contact reliability specified at 1 faulty switching per 100 million operations at 17 V and 1 mA. ## Current Ratings by Duty — AC-15 and DC-13 The auxiliary contacts carry a maximum of 10 A, but the real selection parameter is the rated operational current at the applied voltage and duty. In AC-15 (solenoid/contactor coil switching) at 690 V, the rating is 1 A. In DC-13 (solenoid valve) duty, the current drops with voltage: 10 A at 24 V, 6 A at 125 V, 3 A at 400 V, and 0.26 A at 600 V. For intermediate DC voltages, the rated values are 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, and 0.5 A at 440 V. These ratings define the maximum continuous current the contacts can make and break under inductive load — exceeding them shortens contact life or causes welding. ## Panel Fit and Environmental Limits The block measures 36 mm wide, 37.5 mm high, and 43.7 mm deep, with snap-on DIN rail mounting for quick panel integration. Front protection class is IP20, suitable for enclosed control panels where accidental finger contact is prevented by the enclosure door. Operating temperature range is -25 to +60 °C, with storage from -55 to +80 °C. Insulation voltage is rated 690 V at pollution degree 3, and surge voltage resistance is 6 kV — sufficient for industrial environments with moderate transient activity.","metaTitle":"Siemens 3RH2911-1HA30 Auxiliary Switch, 3 NO, 10 A, SIRIUS","metaDescription":"Siemens 3RH2911-1HA30 SIRIUS auxiliary switch block, 3 NO contacts, rated 10 A at 24 V, screw terminals, snap-on mounting for 3RT2/3RH2 contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"43.7 mm","Width":"36 mm","title":"3RH2911-1HA30","Height":"37.5 mm","Maximum":"10 A","at 24 V":"6 A","at 60 V":"2 A","at 110 V":"1 A","at 125 V":"6 A","at 220 V":"0.3 A","at 230 V":"6 A","at 250 V":"6 A","at 400 V":"3 A","description":"auxiliary switch, on the front, 3 NO,.3/.4,.3/.4,.3/.4, --/--, current path: 1 NO, 1 NO, 1 NO, --, screw terminal, for contactors 3RT2 and contactor relays 3RH2","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","Lagging Switching":"0","Product Brand Name":"SIRIUS","Suitability For Use":"Contactor relay and power contactor","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 440 V rated value":"0.5 A","at 600 V rated value":"0.26 A","Instantaneous Contact":"3","With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","at AC-15 at 690 V rated value":"1 A","protection class IP on the front":"IP20","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"screw-type terminals","insulation voltage with degree of pollution 3 at AC rated value":"690 V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.85","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/24df02416955b23328f31349cb1fb38a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=348819&mlfb=3RH2911-1HA30"},"ai":{"faq":[{"question":"What is the 3RH2911-1HA30 rated current at 24 V DC?","answer":"At 24 V DC, the auxiliary contacts are rated 10 A in DC-13 duty (solenoid valve switching). This is the maximum continuous current the contacts can make and break at that voltage."},{"question":"What contactors does the 3RH2911-1HA30 mount on?","answer":"It mounts on the front of Siemens 3RT2 contactors and 3RH2 contactor relays, adding three NO auxiliary contacts via screw-type terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1HA30","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/3RH2911-1HA30 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}}