{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1HA02-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1HA02-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1HA02-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1HA02-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RH2911-1HA02-ZW98 auxiliary switch block, 2 NC contacts, 10 A maximum, screw-type terminals, snap-on mounting for 3RT2 contactors and 3RH2 contactor relays.","salesMarkdown":"## What this auxiliary switch does on a 3RT2 or 3RH2 base The 3RH2911-1HA02-ZW98: This is a front-mounted auxiliary switch block for Siemens SIRIUS contactors (3RT2) and contactor relays (3RH2). It adds two normally-closed (NC) contacts to the base device, wired via screw-type terminals that accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors, or 2x (20 to 16) and 2x (18 to 14) AWG. The snap-on mounting means it clips directly onto the front of the contactor or relay without tools — no extra DIN rail space needed. The IP20 front protection is standard for enclosed panels; keep the panel door closed during operation. ## Current ratings across the voltage range — what they mean for your circuit The maximum thermal current is 10 A, but the real switching capacity depends on the voltage and load type. At 24 V AC-15 (solenoid/contactor coil duty) it switches 6 A; at 230 V AC-15 it handles 6 A; at 400 V AC-15 it drops to 3 A. For DC loads, the 24 V rated value is 10 A, but at 220 V DC it falls to 1.2 A, and at 600 V DC it's just 0.26 A. The contact reliability spec — one faulty switching per 100 million operations at 17 V, 1 mA — means this switch handles low-signal PLC inputs reliably, not just power circuits. The mechanical life of 10 million switching cycles covers most panel applications for years. ## Panel fit and environmental limits Dimensions are 36 mm wide, 37.5 mm high, 43.7 mm deep — it adds about 44 mm to the front of the contactor. Operating temperature range is -25 to +60 °C; storage range is -55 to +80 °C. The insulation voltage is rated 690 V AC with pollution degree 3, and surge voltage resistance is 6 kV — suitable for 400 V line-to-line panels with proper clearance.","metaTitle":"Siemens 3RH2911-1HA02-ZW98 Auxiliary Switch, 2 NC, 10 A","metaDescription":"Siemens 3RH2911-1HA02-ZW98 auxiliary switch block, 2 NC contacts, rated 10 A max. Snap-on mount for 3RT2/3RH2 contactors. Active production. Quoted to order.","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":"3RH2911-1HA02-ZW98","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, 2 NC,.1/.2,.1/.2, --/--, --/--, current path: 1 NC, 1 NC, --, --, screw terminal, for contactors 3RT2 and contactor relays 3RH2, multi-unit packaging, pack = 60 units","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":"0","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/81527aa2815aeabaa2dc4807ee68334d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=208989&mlfb=3RH2911-1HA02-ZW98"},"ai":{"faq":[{"question":"What is the 3RH2911-1HA02-ZW98's contact configuration?","answer":"It provides two normally-closed (NC) auxiliary contacts, wired via screw-type terminals. The contact sequence is 1 NC, 1 NC."},{"question":"What wire sizes fit the screw terminals?","answer":"The terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) conductors, and 2x (20 to 16) or 2x (18 to 14) AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1HA02-ZW98","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/3RH2911-1HA02-ZW98 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}