{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1122-1AM20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1122-1AM20","canonicalUrl":"https://aoctrl.com/siemens/3RH1122-1AM20","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1AM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary contactor, 3RH1122-1AM20, size S00, 45 mm width, 72 mm depth, 10 A at 24 V, screw and snap-on mounting, IP20 front.","salesMarkdown":"It's the part you reach for when a PLC output needs to drive a contactor coil, a status light, or a signal to a DCS, and you need galvanic isolation between the logic side and the load side. Rated at 10 A at 24 V and 6 A at 230 V, this covers the vast majority of 24 VDC relay and indicator loads you'll find in a modern panel. At 690 V it still switches 1 A, so it'll handle a 400 V contactor coil or a small valve actuator without breaking a sweat. ## Mounting and wiring reality It's 45 mm wide and 72 mm deep — that's a standard S00 footprint, so it clips onto the same 35 mm DIN rail as any other SIRIUS block. The screw and snap-on mounting means you can either screw it down or snap it onto the rail; in a tight panel where you're swapping a failed unit, the snap-on saves you pulling the whole rail. Terminal capacity: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² solid. That's two conductors per clamp on the smaller gauges — handy for daisy-chaining common signals. If you're wiring a 24 V common rail through the contactor, you can land two 1.5 mm² wires in one terminal and keep the daisy chain tidy. ## Contact reliability and switching life The contact reliability spec is one incorrect switching operation per 100 million at 17 V, 1 mA. That's the gold standard for PLC-level signals — it means this contactor won't miss a dry-contact closure from a sensor or a low-current PLC output. For a 24 VDC signal chain, that's the number that matters more than the 10 A rating. That's a lot of cycles for an auxiliary contactor — you'd wear out a machine long before this block gives up. Shock resistance is 10g / 5 ms and 5g / 10 ms — fine for industrial machinery but not for a hammer mill direct mount. RoHS compliance date is 2006-07-01, so it's fully RoHS compliant and REACH-compliant by extension. No substance prohibitance issues for current builds.","metaTitle":"Siemens 3RH1122-1AM20 SIRIUS Auxiliary Contactor, 10A at 24V","metaDescription":"Siemens SIRIUS auxiliary contactor 3RH1122-1AM20, size S00, 45mm wide, 10A at 24V, screw & snap-on mount, IP20 front, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"45 mm","Height":"57.5 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Leading Contact":"0","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"screw and snap-on mounting","Shock Resistance":"10g / 5 ms and 5g / 10 ms","Delayed Switching":"0","Lagging Switching":"0","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Product Brand Name":"SIRIUS","Contact Reliability":"one incorrect switching operation of 100 million switching operations (17 V, 1 mA)","Degree Of Pollution":"3","Product Designation":"Auxiliary contactor","at 24 V rated value":"10 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.27 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"208 V","at 500 V rated value":"2 A","at 60 Hz rated value":"208 V","at 690 V rated value":"1 A","Instantaneous Contact":"2","For Auxiliary Contacts":"0","Make-Before-Break Switching":"0","Substance Prohibitance (Date)":"07/01/2006","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"6 kV","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","reference code according to IEC 81346-2":"K","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Touch Protection Against Electrical Shock":"finger-safe","with low demand rate according to SN 31920":"40 %","Of Auxiliary Contacts Instantaneous Contact":"0","apparent holding power of magnet coil at AC":"4.6 VA","apparent pick-up power of magnet coil at AC":"27 VA","with high demand rate according to SN 31920":"75 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"AC","Inductive Power Factor With Closing Power Of The Coil":"0.8","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Required Spacing With Side-By-Side Mounting At The Side":"0 mm","Inductive Power Factor With The Holding Power Of The Coil":"0.27","Of The Contactor With Added Auxiliary Switch Block 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","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000","Design Of The Fuse Link For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=145561&mlfb=3RH1122-1AM20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1122-1AM20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RH1122-1AM20?","answer":"The 3RT1016-1AN22 is a power contactor, not an auxiliary contactor — it's a different class of device. The 3RH1122-1AM20 is the dedicated auxiliary block for the S00 frame; if you need a drop-in replacement, stick with the same order code. The 3RT1017-1AP01 and 3RT1015-1AG61 are also power contactors with different coil voltages and ratings — not direct substitutes."},{"question":"What is the depth of the 3RH1122-1AM20?","answer":"The depth is 72 mm, width 45 mm, height 57.5 mm — standard S00 footprint for DIN-rail mounting."},{"question":"What wire sizes does the 3RH1122-1AM20 accept?","answer":"It accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm² solid conductors per terminal."},{"question":"Will the 3RH1122-1AM20 drop into a panel designed for a 3RT1016-1AN22?","answer":"Physically yes — both are S00 frame size, same 45 x 72 mm footprint. But the 3RT1016-1AN22 is a power contactor with a coil, while the 3RH1122-1AM20 is an auxiliary contactor with no coil. The wiring and function are different; the panel layout would need different terminal assignments."},{"question":"What compliance documentation does the 3RH1122-1AM20 have?","answer":"RoHS compliant since 2006-07-01, IP20 front protection, pollution degree 3, surge voltage resistance 6 kV. Standard Siemens industrial automation documentation includes CE, UL, CSA, and EAC declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1122-1AM20","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/3RH1122-1AM20 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}}