{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH1911-1HA22-ZW97","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH1911-1HA22-ZW97","canonicalUrl":"https://aoctrl.com/siemens/3RH1911-1HA22-ZW97","factsUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1HA22-ZW97","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH1911-1HA22-ZW97, 4-pole 2 NO + 2 NC, 10 A, screw-type terminals, snap-on mounting for SIRIUS contactors.","salesMarkdown":"The Siemens SIRIUS 3RH1911-1HA22-ZW97 is a 4-pole auxiliary switch block with 2 normally open and 2 normally closed contacts, rated for a maximum of 10 A and designed for snap-on mounting onto SIRIUS contactor relays and power contactors. This is the variant with the ZW97 modifier — a multi-unit packaging configuration (140 units per pack) that signals bulk procurement, not a standard single-unit order code. The 10 A maximum is the thermal continuous current (Ith) — the block can carry 10 A through any closed contact indefinitely at rated temperature. But switching capacity depends on voltage and duty: at 24 V it switches 6 A (AC-15, typical for solenoid loads), at 110 V it drops to 1 A, and at 400 V it handles 3 A. The AC-15 rating at 690 V is 1 A — that's the inductive load capability at the insulation voltage ceiling. For DC switching, the 24 V rated value is 10 A, but at 220 V it falls to 1.2 A, and at 600 V to just 0.26 A. The buyer selecting this for a 24 VDC control circuit gets the full 10 A; for a 230 VAC pilot circuit, expect 6 A. The insulation system is rated 690 V AC with pollution degree 3 (typical for industrial control panels where conductive dust or humidity is present), and surge voltage resistance is 6 kV. That means it can be used in 400 V motor starter circuits without additional isolation, as long as the contactor it mounts on shares the same pollution environment. For low-energy signal switching (PLC inputs, sensor signals), the contacts are rated for gold-level reliability, not just power switching. Mechanical life is 10 million switching cycles typical. Snap-on mounting directly onto SIRIUS contactor relays and power contactors — no DIN rail required. The block clips onto the front of the contactor, adding auxiliary contacts without increasing panel width. Dimensions are compact: 36.5 mm wide, 41.5 mm deep, 37.5 mm high, fitting within the contactor envelope for size S00 and S0 frames. Screw-type terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) with core-end processing, or 2x (20 to 16 AWG) or 2x (18 to 14 AWG) for solid/stranded. The IP20 front protection means the terminals are finger-safe but the block is not sealed — install inside a cabinet rated for the environment.","metaTitle":"Siemens 3RH1911-1HA22-ZW97 Auxiliary Switch Block, 4-pole, 1","metaDescription":"Siemens SIRIUS 3RH1911-1HA22-ZW97 auxiliary switch block, 2 NO + 2 NC, 10 A, screw terminals, snap-on mounting. Phased-out; successor is 3RH2 series. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH1","Depth":"41.5 mm","Width":"36.5 mm","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","During Storage":"-55 ... +80 °C","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"snap-on mounting","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":"2","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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=252502&mlfb=3RH1911-1HA22-ZW97","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH1911-1HA22-ZW97/alternatives.json"},"ai":{"faq":[{"question":"What replaces 3RH1911-1HA22-ZW97?","answer":"The official successor is the SIRIUS 3RH2 series auxiliary switch blocks, such as the 3RH2122-1WB40. Note the 3RH2 blocks are physically larger (45 mm wide, 73 mm deep) and mount on DIN rail rather than directly on the contactor front. Panel rework is required for a drop-in replacement."},{"question":"Where can I buy 3RH1911-1HA22-ZW97?","answer":"This phased-out part is sourced to order against an RFQ through independent industrial distribution. Availability and current pricing are confirmed at quote time. Submit an RFQ for a firm price and lead time on new-old-stock or surplus units."},{"question":"What is the contact configuration of 3RH1911-1HA22-ZW97?","answer":"It is a 4-pole block with 2 normally open (NO) and 2 normally closed (NC) instantaneous contacts, designated 22 E per EN 50012."},{"question":"Will 3RH1911-1HA22-ZW97 fit a panel designed for 3RH2122-1WB40?","answer":"No, the 3RH1911 is significantly smaller — 36.5 mm wide and 41.5 mm deep versus 45 mm wide and 73 mm deep for the 3RH2122-1WB40. The 3RH1911 also snaps onto the contactor front rather than mounting on DIN rail. A panel designed for the larger 3RH2 block will have excess space and different mounting provisions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH1911-1HA22-ZW97","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/3RH1911-1HA22-ZW97 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}}