{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA9187-0TB50","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA9187-0TB50","canonicalUrl":"https://aoctrl.com/siemens/3VA9187-0TB50","factsUrl":"https://aoctrl.com/api/mcp/products/3VA9187-0TB50","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA9187-0TB50, 24 V module, 4 slots, right switch pocket mount, screw terminals, IP20, 33 x 29 x 63 mm.","salesMarkdown":"The Siemens SENTRON 3VA9187-0TB50 is a 24 V module designed as an accessory for the 3VA2 molded case circuit breaker family, specifically the 100, 160, and 250 A frame sizes. It occupies the right switch pocket of the breaker, adding communication and measurement functions via its four slots. This is the part that brings remote monitoring and control capability to a 3VA2 installation — without it, the breaker is a standalone overcurrent device. Mounting is straightforward: the module snaps into the right-side pocket of the 3VA2 breaker. No DIN rail or additional bracket is needed — the breaker itself is the mounting surface. The module draws a maximum of 0.1 A from the control supply and dissipates 2.4 W, so it adds negligible thermal load to the enclosure. Power is delivered via screw-type terminals at the inputs for supply voltage, with a 20% symmetrical tolerance on the control feed voltage — meaning a nominal 24 VDC supply can sag to 19.2 V or rise to 28.8 V without dropping the module. Overvoltage category I means it is intended for circuits connected to the mains via a transformer or similar isolation — not for direct connection to the utility supply. Operating resource protection class III per IEC 61558 means the module is supplied from a safety extra-low voltage (SELV) source — the 24 V supply must come from a transformer or power supply that provides SELV output. The module also provides power to the electronic trip unit of the 3VA2 breaker, which is its primary function: it keeps the trip unit alive for communication and metering even when the main breaker contacts are open.","metaTitle":"Siemens 3VA9187-0TB50 24V Module, 4 Slots, Right Pocket Moun","metaDescription":"Siemens SENTRON 3VA9187-0TB50 24V module for 3VA2 100/160/250. 4 slots, IP20, screw terminals. Active production. Quoted 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 100/160/250","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/04d061c1c3fc4f1ef0736ab1b89b578f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=315684&mlfb=3VA9187-0TB50","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA9187-0TB50/alternatives.json"},"ai":{"faq":[{"question":"What is the 3VA9187-0TB50 used for?","answer":"It is a 24 V communication and measurement module that mounts in the right switch pocket of a Siemens 3VA2 molded case circuit breaker (100, 160, or 250 A frame). It adds four slots for communication and measurement functions and powers the breaker's electronic trip unit."},{"question":"Where can I buy the 3VA9187-0TB50?","answer":"The 3VA9187-0TB50 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What compliance documentation does Siemens provide for the 3VA9187-0TB50?","answer":"The module carries an IP20 rating per IEC 60529, pollution degree 3, overvoltage category I, and operating resource protection class III per IEC 61558. It is a Siemens SENTRON product, so standard Siemens declarations of conformity (CE, UKCA) and material compliance (RoHS, REACH) are available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA9187-0TB50","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/3VA9187-0TB50 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}}