{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9573-0JG23","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9573-0JG23","canonicalUrl":"https://aoctrl.com/siemens/3VA9573-0JG23","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9573-0JG23","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON TA3.1 circular conductor terminal, internal, 2 cables, 4 units, for 3VA55/3VA65/3VA66, stranded 120-300 mm²: 42.4 Nm.","salesMarkdown":"The Siemens 3VA9573-0JG23 is a SENTRON TA3.1 wire connector designed as a circular conductor terminal for internal use, accepting two cables per unit and sold in a pack of four. It's the factory-specified accessory for 3VA55, 3VA65, and 3VA66 molded-case circuit breakers — if you're building or maintaining a panel around those frames, this is the terminal that lands the big feeders. ## Wire range and torque — what the numbers mean Each terminal accepts copper or aluminum stranded conductors from 4/0 AWG up to 600 kcmil, and finely stranded copper the same range. For the common metric sizes, stranded 120–300 mm² and finely stranded 120–185 mm² both torque to 42.4 Nm. That's a serious lug — you're landing service-entrance or large feeder conductors, not control wiring. The stripped length spec is 1.0 inch, which matches standard heavy-duty crimp lug prep. ## Control wire tap — a detail that saves a splice The TA3.1 includes a control wire voltage tap-off on each terminal. That means you can pick off the line-side voltage for a shunt trip, auxiliary relay, or meter without adding a separate tap block or splicing into the main conductor. On a 3VA55/65/66 install, that's one less junction to torque-check and one less point of failure.","metaTitle":"Siemens 3VA9573-0JG23 SENTRON TA3.1 Wire Connector, 2x4/0-60","metaDescription":"Siemens 3VA9573-0JG23 SENTRON TA3.1 wire connector for 3VA55/3VA65/3VA66 breakers. Accepts 2x4/0-600 kcmil Cu/Al stranded, 42.4 Nm torque. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Stranded":"120 300 mm2: 42.4 Nm","Accessories":"Wire connector","Finely Stranded":"120 185 mm2: 42.4 Nm","Stripped Length":"1.0 in","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"accessories","Design Of The Product":"circular conductor terminal, internal, 2 cables, 4 units","Designation / Of The Terminal":"TA3.1","For Copper Cable / Stranded / Maximum":"600 kcmil","For Copper Cable / Stranded / Minimum":"4/0 AWG","For Aluminum Cable / Stranded / Maximum":"600 kcmil","For Aluminum Cable / Stranded / Minimum":"4/0 AWG","For Copper Cable / Finely Stranded / Maximum":"600 kcmil","For Copper Cable / Finely Stranded / Minimum":"4/0 AWG","Type Of Electrical Connection / With Control Wire Tap":"Yes"}},"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=1414085&mlfb=3VA9573-0JG23","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9573-0JG23/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3VA9573-0JG23 accept?","answer":"It accepts copper or aluminum stranded conductors from 4/0 AWG up to 600 kcmil, and finely stranded copper the same range. In metric: stranded 120–300 mm² and finely stranded 120–185 mm², both torqued to 42.4 Nm. Stripped length is 1.0 inch."},{"question":"Which circuit breakers does the TA3.1 terminal fit?","answer":"It is the factory-specified wire connector for Siemens 3VA55, 3VA65, and 3VA66 molded-case circuit breaker frames. It's an internal circular conductor terminal accepting two cables per unit, sold in a pack of four."},{"question":"Does the TA3.1 terminal include a control wire tap?","answer":"Yes, each terminal has a control wire voltage tap-off built in. This lets you pick off line-side voltage for a shunt trip or auxiliary device without a separate tap block."},{"question":"Where can I buy the 3VA9573-0JG23?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9573-0JG23","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/3VA9573-0JG23 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}}