{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5HM42-0AA0, molded case circuit breaker, 4-pole, 25 A continuous rated current, breaking capacity 187 kA at 240 V AC, line protection design.","salesMarkdown":"The 25 A is the full-scale value; the adjustable thermal-magnetic trip starts at a minimum setting of 15 A. The interrupting capacity is where this breaker earns its panel space: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those numbers mean it can clear a fault at the full available short-circuit current of most industrial distribution boards without the upstream breaker needing to trip — selectivity stays intact. It's designed for high-fault locations like a transformer secondary or a main switchboard feeder. The ground-fault monitoring uses summation current formation on L+N conductors — that's a residual-current detection method built into the breaker body, not an external module. That 140 mm width across four poles is standard for a SENTRON 3VA2 frame — it fits the same DIN-rail or mounting-plate footprint as other 3VA2 4-pole breakers. No undervoltage release fitted (no voltage trigger), so if the panel spec calls for UVR the buyer needs a different variant or an add-on accessory. No trip indicator either — visual status is via the handle position only. The 3VA2 platform is Siemens' mainstream MCCB line, widely specified in commercial and industrial panels.","metaTitle":"Siemens 3VA2125-5HM42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA2125-5HM42-0AA0 molded case circuit breaker, 25 A continuous, 4-pole, line protection. Breaking capacity 187 kA at 240 V AC. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","Height":"181 mm","Maximum":"300 A","Minimum":"38 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"3.7 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [In]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","Initial Value":"15 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"25 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU330","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"160 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=68899&mlfb=3VA2125-5HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5HM42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-5HM42-0AA0 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 3VA2125-5HM42-0AA0's listed depth (86 mm) on this component line?","answer":"The depth is 86 mm, width 140 mm, height 181 mm — standard 3VA2 4-pole frame dimensions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5HM42-0AA0","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/3VA2125-5HM42-0AA0 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}}