{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9387-0TB50","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9387-0TB50","canonicalUrl":"https://aoctrl.com/siemens/3VA9387-0TB50","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9387-0TB50","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA9387-0TB50 24 V module, 4 slots, 33x29x63 mm, IP20, for 3VA2 400/630/1000 breakers.","salesMarkdown":"The Siemens SENTRON 3VA9387-0TB50 is a 24 V module designed as an accessory for 3VA2 molded-case circuit breakers in the 400 A, 630 A, and 1000 A frame sizes. It mounts in the right switch pocket of the breaker and provides four slots for communication and measurement functions. The module draws a maximum of 0.1 A from the 24 V supply and dissipates 2.4 W. It powers the electronic trip unit and communicates with the breaker's internal systems, but it does not handle motor-drive, function-module, or residual-current communication, nor does it detect switch position (On/Off/Tripped). ## Fit and environment Physical footprint is 33 mm deep, 29 mm wide, and 63 mm tall. Supply voltage tolerance is ±20 %.","metaTitle":"Siemens 3VA9387-0TB50 24V Module, 4 Slots, IP20","metaDescription":"Siemens SENTRON 3VA9387-0TB50 24 V module accessory for 3VA2 400/630/1000 breakers. 4 slots, 0.1 A draw, 2.4 W loss, IP20. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Circuit Breaker Accessories"],"specifications":{"Depth":"33 mm","Width":"29 mm","Height":"63 mm","Maximum":"80 °C","Minimum":"-40 °C","Accessories":"Communication and measurement function","Number Of Slots":"4","lifecycle_stage":"current","Mounting Position":"Right switch pocket","Product Brand Name":"SENTRON","Degree Of Pollution":"3","Product Designation":"24 V module","protection class IP":"20 acc. to IEC60529","Overvoltage Category":"I","Design Of The Product":"Accessories for 3VA","Suitability For Operation":"3VA2 400/630","Consumed Current / Maximum":"0.1 A","power loss [W] / rated value":"2.4 W","Communication With Motor Drive":"No","Communication With Function Module":"No","Operating Resource Protection Class":"III according to IEC61558","Electronic Tripping Unit Power Supply":"Yes","Communication With Residual Current Equipment":"No","detection of switch position: On, Off, Tripped":"No","Data Exchange With The Electronic Tripping Unit":"No","Type Of Electrical Connection / At The Inputs For Supply Voltage":"screw-type terminals","Relative Symmetrical Tolerance / Of The Operating Range Of The Control Feed Voltage":"20 %"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f616d732cf75ab053b66035a07be5baf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=209049&mlfb=3VA9387-0TB50","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9387-0TB50/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA9387-0TB50 used for?","answer":"It is a 24 V module accessory that mounts in the right switch pocket of 3VA2 molded-case circuit breakers (400 A, 630 A, 1000 A frames). It provides four slots for communication and measurement add-ons and supplies power to the electronic trip unit."},{"question":"Where can I buy 3VA9387-0TB50?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for 3VA9387-0TB50?","answer":"The module carries protection class III per IEC 61558 and IP20 per IEC 60529. It is rated for pollution degree 3 and overvoltage category I. Standard Siemens documentation (datasheet, CE declaration) applies; specific RoHS/REACH/UL statements are available on request from the manufacturer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9387-0TB50","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/3VA9387-0TB50 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}}