{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH7122-1AH00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH7122-1AH00","canonicalUrl":"https://aoctrl.com/siemens/3RH7122-1AH00","factsUrl":"https://aoctrl.com/api/mcp/products/3RH7122-1AH00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS contactor relay, size S00, 4-pole (2 NO + 2 NC), AC coil, screw-type terminals, snap-on 35 mm DIN rail mounting, IP20 front protection.","salesMarkdown":"The Siemens 3RH7122-1AH00 is a SIRIUS contactor relay in size S00, designed as a 4-pole switching element with 2 normally-open and 2 normally-closed auxiliary contacts, identified by the switching element code 22 E. The control supply voltage is AC only; the coil draws 27 VA apparent pick-up power and 5.4 VA apparent holding power at an inductive power factor of 0.8 and 0.27 respectively. ## Rated operational currents — what the values mean for your circuit The auxiliary contacts are rated at 6 A for 24 V, 230 V, and 400 V circuits, and at 1 A for 110 V and 690 V, with a derated 0.3 A at 220 V — these are the maximum continuous currents the contacts can make and break under the respective AC voltage conditions. For DC-13 duty (solenoid loads), the maximum operating frequency is 1 000 operations per hour, which sets the cycling limit for applications like valve or brake control. The contacts are specified for PLC-level reliability at 17 V and 5 mA, meaning they can switch low-energy signals without the oxide-film issues that plague standard contacts — important when feeding directly into a digital input card. Installation altitude is limited to 2 000 m above sea level without derating. Shock resistance is 15g for 5 ms and 8g for 10 ms under sine-pulse conditions. Auxiliary and control circuits terminate via screw-type terminals, accepting solid or stranded conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², or 2x 4 mm². Finely stranded wire with core-end processing uses the same ranges. The product supports an auxiliary switch extension, allowing additional contact blocks to be added on-site without removing the base relay. For BOM freeze or second-source evaluation, the closest functional peer in the SIRIUS range is the 3RT7016-1AF01, which shares the same S00 frame size and DIN-rail footprint but uses a different coil voltage and contact configuration — verify the coil rating and contact arrangement before substituting.","metaTitle":"Siemens 3RH7122-1AH00 SIRIUS Contactor Relay, 4-pole, AC coi","metaDescription":"Siemens SIRIUS 3RH7122-1AH00 contactor relay, size S00, 4-pole (2 NO + 2 NC), AC coil, screw terminals, snap-on 35mm DIN rail. Rated 6 A at 24 V, 230 V, 400 V. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Width":"45 mm","Height":"57.5 mm","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","During Storage":"-25 ... +70 °C","lifecycle_stage":"current","During Operation":"-10 ... +55 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","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","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"Contactor relay","at 24 V rated value":"6 A","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"6 A","at 50 Hz rated value":"48 V","at 60 Hz rated value":"48 V","at 690 V rated value":"1 A","protection class IP on the front":"IP20","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"24 kV","operating frequency at DC-13 maximum":"1 000 1/h","shock resistance with sine pulse at AC":"15g / 5 ms, 8g / 10 ms","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Contact Reliability Of Auxiliary Contacts":"acceptability for PLC control (17 V, 5 mA)","apparent holding power of magnet coil at AC":"5.4 VA","apparent pick-up power of magnet coil at AC":"27 VA","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","shock resistance at rectangular impulse at AC":"10g / 5 ms, 5g / 10 ms","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","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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","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=1533810&mlfb=3RH7122-1AH00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH7122-1AH00/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for the 3RH7122-1AH00?","answer":"The 3RT7016-1AF01 is the closest functional peer in the SIRIUS range, sharing the same S00 frame size and DIN-rail mounting, but it has a different coil voltage and contact arrangement — verify the coil rating and contact configuration before substituting."},{"question":"What are the key ratings for the 3RH7122-1AH00?","answer":"It is a 4-pole contactor relay (2 NO + 2 NC) with an AC coil, rated 6 A at 24 V, 230 V, and 400 V, and 1 A at 110 V and 690 V. The coil draws 27 VA pick-up and 5.4 VA holding power. It mounts on 35 mm DIN rail and has IP20 front protection."},{"question":"Will the 3RH7122-1AH00 drop into a panel specified around the 3RT7016-1AF01 without rewiring?","answer":"Both parts share the same S00 frame size and snap onto 35 mm DIN rail, so the mechanical footprint is identical. However, the coil voltage and contact configuration differ — verify the control supply and auxiliary contact arrangement before assuming a drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH7122-1AH00","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/3RH7122-1AH00 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}}