{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT7926-1BB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT7926-1BB00","canonicalUrl":"https://aoctrl.com/siemens/3RT7926-1BB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT7926-1BB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT7926-1BB00 varistor surge suppressor, S0 contactor size, AC/DC control voltage, clip-on mounting, 12 mm depth.","salesMarkdown":"## What This Varistor Does on a 3RT7 S0 Contactor The 3RT7926-1BB00 is a varistor-type surge suppressor designed to plug directly onto Siemens 3RT7 S0-size contactors. It clamps voltage transients from the coil circuit, protecting downstream PLC outputs and extending contactor life in inductive switching applications. It accepts both AC and DC control supply voltages: 24 to 70 V DC, and 24 to 48 V AC at both 50 Hz and 60 Hz. The varistor element absorbs the inductive kick when the contactor coil de-energizes, preventing the voltage spike from exceeding the coil's insulation rating. ## Physical Fit and Panel Integration This suppressor clips onto the contactor — no additional DIN rail space required. Its dimensions are 12 mm deep, 30 mm wide, and 19 mm high, so it adds negligible depth to the S0 contactor footprint. Mounting position is unrestricted, which helps in tight enclosures or when contactors are banked side-by-side. The operating temperature range is -10 to +55 °C, with storage from -25 to +70 °C. This covers most industrial control panel environments without derating. ## Lifecycle and Sourcing Reality RoHS compliance substance prohibition date is June 15, 2022, confirming it meets current EU substance restrictions.","metaTitle":"Siemens 3RT7926-1BB00 SIRIUS Surge Suppressor, Varistor, S0","metaDescription":"Siemens 3RT7926-1BB00 SIRIUS varistor surge suppressor for 3RT7 S0 contactors. AC/DC 24-70V DC, 24-48V AC. Clip-on, 12mm deep.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"12 mm","Width":"30 mm","at DC":"24 ... 70 V","title":"3RT7926-1BB00","Height":"19 mm","at 50 Hz":"24 ... 48 V","at 60 Hz":"24 ... 48 V","description":"Surge suppressor VARISTOR For plugging onto contactors 3RT7 S0","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-25 ... +70 °C","lifecycle_stage":"current","During Operation":"-10 ... +55 °C","Fastening Method":"clip-on","Mounting Position":"any","Size Of Contactor":"S0","Product Brand Name":"SIRIUS","Product Designation":"surge suppressor","Substance Prohibitance (Date)":"06/15/2022","Design Of The Surge Suppressor":"Varistor","Type Of Voltage Of The Control Supply Voltage":"AC/DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3e05dbb1a67d224c99dfdbd7610e582c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1646525&mlfb=3RT7926-1BB00"},"ai":{"faq":[{"question":"What voltage ranges does 3RT7926-1BB00 cover?","answer":"It covers 24 to 70 V DC and 24 to 48 V AC at both 50 Hz and 60 Hz. The AC/DC designation means it works on either supply type within those ranges."},{"question":"Will 3RT7926-1BB00 fit a panel designed around 6ES7193-4CC30-0AA0?","answer":"No — those are different component classes. The 6ES7193-4CC30-0AA0 is an ET 200S electronics module (43 mm deep, 15 mm wide, 132 mm high), while the 3RT7926-1BB00 is a contactor-mount surge suppressor (12 mm deep, 30 mm wide, 19 mm high). They serve different functions and mounting methods; no direct panel drop-in replacement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT7926-1BB00","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/3RT7926-1BB00 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}}