{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2122-1BF40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2122-1BF40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RH2122-1BF40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2122-1BF40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2122-1BF40-ZX95 contactor relay, Size S00, 110 VDC coil, screw and snap-on mounting on 35 mm DIN rail, 2 instantaneous contacts, auxiliary switch extension.","salesMarkdown":"Its primary job is switching control circuits in panels — think PLC outputs driving motor contactor coils or signaling to downstream auxiliaries. ## Switching capacity — what the DC ratings mean for fit This relay carries a set of DC-12 switching ratings that define the load it can break across different voltages. At 24 V DC it is rated for 10 A; at 110 V DC that drops to 3 A; at 220 V DC it is 1.2 A; and at 600 V DC it falls to 0.26 A. For a maintenance planner, the 24 V DC 10 A rating is the one that covers most PLC output interposing and solenoid valve circuits — that is the fast-moving spare to keep on the shelf. The Size S00 body is 45 mm wide, 58 mm high, and 73 mm deep — fits standard panel layouts without special bracketry. Wire termination accepts 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or 2x 4 mm² solid or stranded. Operates in -25 to +60 °C ambient; stores in -55 to +80 °C. Pollution degree 3 (industrial environment with conductive pollution). Relative humidity minimum 10 %. RoHS compliance date for substance prohibitance is 10/01/2009. Surge voltage resistance rated at 6 kV.","metaTitle":"Siemens 3RH2122-1BF40-ZX95 Contactor Relay, 110 VDC, Size S0","metaDescription":"Siemens 3RH2122-1BF40-ZX95 contactor relay, Size S00, 110 VDC coil, rated 10 A at 24 VDC. Screw and snap-on mounting on 35 mm DIN rail. Current lifecycle stage. Sourced to order. R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"10 000 1/h","at DC":"7 ... 13 ms","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","Rated Value":"110 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","Full-Scale Value":"1.1","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","Degree Of Pollution":"3","at 24 V rated value":"10 A","at 60 V rated value":"4.7 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"3 A","at 220 V rated value":"1.2 A","at 230 V rated value":"10 A","at 400 V rated value":"3 A","at 440 V rated value":"0.5 A","at 500 V rated value":"2 A","at 600 V rated value":"0.26 A","at 690 V rated value":"1 A","Instantaneous Contact":"2","Relative Humidity Minimum":"10 %","Substance Prohibitance (Date)":"10/01/2009","Product Extension Auxiliary Switch":"Yes","closing power of magnet coil at DC":"4 W","holding power of magnet coil at DC":"4 W","Surge Voltage Resistance Rated Value":"6 kV","operating frequency at DC-12 maximum":"1 000 1/h","operating frequency at DC-13 maximum":"1 000 1/h","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","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)","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"2","Type Of Voltage Of The Control Supply Voltage":"DC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Identification Number And Letter For Switching Elements":"22 E","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","design of the miniature circuit breaker for short-circuit protection of the auxiliary circuit up to 230 V":"C characteristic: 6 A; 0.4 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2576f0977ff3212a4a2889eb0b42f36c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1684632&mlfb=3RH2122-1BF40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2122-1BF40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What are the key switching ratings for 3RH2122-1BF40-ZX95?","answer":"At 24 V DC it is rated for 10 A; at 110 V DC for 3 A; at 220 V DC for 1.2 A; and at 600 V DC for 0.26 A. The arcing time is 10 to 15 ms."},{"question":"How do I get pricing and availability for 3RH2122-1BF40-ZX95?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"What is the mounting method and panel clearance for this relay?","answer":"It mounts via screw or snap-on onto 35 mm DIN rail. Clearances needed: 10 mm upward, 10 mm forward, 10 mm downward, and 6 mm at the side. The body dimensions are 45 mm wide, 58 mm high, and 73 mm deep."},{"question":"Will 3RH2122-1BF40-ZX95 drop into a panel specified for 3RH2122-1BW40?","answer":"Both are Size S00 contactor relays on the same 35 mm DIN-rail footprint, so the mechanical fit and wiring clearances are the same. The difference is the coil voltage — this unit has a 110 V DC coil, while the -1BW40 variant uses a different coil rating. Verify the control voltage before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2122-1BF40-ZX95","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/3RH2122-1BF40-ZX95 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}}