{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RH2921-2XN22-0GS0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RH2921-2XN22-0GS0","canonicalUrl":"https://aoctrl.com/siemens/3RH2921-2XN22-0GS0","factsUrl":"https://aoctrl.com/api/mcp/products/3RH2921-2XN22-0GS0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS auxiliary switch, solid-state compatible, front-mounted, 2 NO + 2 NC, spring-loaded terminals, 10 A maximum, snap-on mounting, IP20.","salesMarkdown":"The Siemens 3RH2921-2XN22-0GS0 is a front-mounted auxiliary switch block from the SIRIUS family, designed for use with contactor relays and power contactors. It provides 2 normally open and 2 normally closed contacts, with two of the NC contacts specifically rated as solid-state compatible — meaning they reliably switch low-level signals down to 17 V, 1 mA with a contact reliability of 1 faulty switching per 100 million operations. This variant is a customer-specific version, identified by the -0GS0 suffix and the petrol-colored label, and is intended for use with the 3RT2026-1FB40-1KS0 contactor. The spring-loaded terminals accept 2x (0.5... 1.5 mm²) with ferrule or 2x (0.5... 2.5 mm²) solid, and the block snaps onto a DIN rail. The maximum thermal current is 10 A, but the switching capacity varies significantly with voltage and duty. For AC-15 control circuit use at 690 V, the rated operational current is 1 A — that's the figure to check for pilot duty on higher-voltage contactor coils. At 24 V DC the rated value is 10 A, dropping to 0.26 A at 600 V DC, so verify your load voltage against the DC switching curve. The insulation rating is 690 V AC with degree of pollution 3, and surge voltage resistance is 6 kV. This means the block is suitable for 400 V line-to-line panels and will handle typical transient overvoltages in industrial environments without flashover. The front protection class is IP20 — finger-safe but not washdown-rated, so keep it inside the enclosure. Because it is a customer-specific variant (-0GS0 suffix), availability may be less immediate than a standard catalog number. The RFQ is the cleanest path to confirm lead time and pricing for this exact order code, especially if you are matching a petrol-labeled panel that was originally built to this variant. The block measures 36 mm wide, 47.7 mm deep, and 41.5 mm high. The spring-loaded terminals are tool-less for solid wire up to 2.5 mm²; for ferruled stranded, the range is 0.5 to 1.5 mm². AWG equivalents are 2x (20... 14). The leading contact is 0, lagging switching is 0, and instantaneous contacts are 2 — meaning all four contacts switch simultaneously with no intentional delay.","metaTitle":"Siemens 3RH2921-2XN22-0GS0 SIRIUS Auxiliary Switch, 2 NO + 2","metaDescription":"Siemens SIRIUS 3RH2921-2XN22-0GS0 auxiliary switch, solid-state compatible, 2 NO + 2 NC, 10 A max, spring-loaded terminals, snap-on mounting, IP20, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Note":"with 3RH2","Depth":"47.7 mm","Width":"36 mm","title":"3RH2921-2XN22-0GS0","Height":"41.5 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, solid-state compatible, on the front, 2 NO + 2 NC, 11/12, 23/24, 33/34, 41/42, current path: 1 NC (solid-state compatible), 1 NO, 1 NO, 1 NC (solid-state compatible), spring-loaded terminal, customer-specific, only for 3RT2026-1FB40-1KS0, label petrol","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":"2","With Core End Processing":"2x (0.5 ... 1.5 mm²)","Without Core End Processing":"2x (0.5 ... 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 ... 14)","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","Type Of Electrical Connection For Auxiliary And Control Circuit":"spring-loaded 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/0a0dbe1a43711a6cc84691d8f0503d90.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1419155&mlfb=3RH2921-2XN22-0GS0"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RH2921-2XN22-0GS0?","answer":"The standard catalog auxiliary switch 3RH2422-1AB00 provides a similar 2 NO + 2 NC contact arrangement but lacks the solid-state-compatible NC contacts and the customer-specific petrol label. It will not drop into a panel wired for the -0GS0 variant without verifying the contact assignment and wire labeling."},{"question":"What does the note 'with 3RH2' mean?","answer":"The note indicates this auxiliary switch block is designed to mount on and operate with SIRIUS 3RH2 contactor relays. It is mechanically keyed to that frame size."},{"question":"What compliance documentation is available for this part?","answer":"The part carries a 690 V AC insulation rating with degree of pollution 3 and 6 kV surge voltage resistance, indicating it meets IEC 60947-5-1 requirements for control circuit devices. Specific RoHS/REACH declarations are available from Siemens upon request as part of the standard SIRIUS documentation package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RH2921-2XN22-0GS0","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/3RH2921-2XN22-0GS0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}