{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2911-1MA02","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2911-1MA02","canonicalUrl":"https://aoctrl.com/siemens/3RH2911-1MA02","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1MA02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch block, 3RH2911-1MA02, 2 NC contacts, screw terminals, front mount for 3RT2 contactors and 3RH2 contactor relays, 10 A thermal, 690 V insulation.","salesMarkdown":"## What it is — front-mounted auxiliary switch for SIRIUS contactors The Siemens 3RH2911-1MA02 is a front-mounted auxiliary switch block for the SIRIUS family, designed to snap onto 3RT2 power contactors and 3RH2 contactor relays. It carries two normally-closed (NC) circuits — terminals 71/72 and 81/82 — with cable entry from below. The screw-type terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) conductors, or 2x (20...16) or 2x (18...14) AWG. Rated at 10 A thermal current (Ith), this block handles the full auxiliary contact rating of the contactor frame it mounts to. The AC-15 switching capacity tells you the real-world inductive load it can break: 10 A at 24 V, 6 A at 125/230/250 V, 3 A at 400 V, and 1 A at 690 V. For DC switching, the ratings drop faster — 6 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V — so check your DC control circuit voltage against the curve. The insulation voltage is 690 V at pollution degree 3, with a rated surge voltage resistance of 6 kV, meaning it's suitable for 400/480 VAC panels without additional creepage concerns. Mechanical life is 10 million switching cycles typical, which outlasts most contactor main contacts in cyclic service. ## Where it fits — panel integration Snap-on mounting to the contactor front. Dimensions: 36 mm wide, 37.5 mm high, 43.7 mm deep. IP20 on the front.","metaTitle":"Siemens 3RH2911-1MA02 Auxiliary Switch, 2 NC, 10 A, SIRIUS","metaDescription":"Siemens SIRIUS 3RH2911-1MA02 auxiliary switch block, 2 NC contacts, rated 10 A thermal, 690 V insulation. Snap-on front mount for 3RT2/3RH2 contactors. Active production, sourced t","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","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","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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=188586&mlfb=3RH2911-1MA02","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RH2911-1MA02/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2911-1MA02","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/3RH2911-1MA02 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}}