{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5JQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5JQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5JQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5JQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5JQ42-0AA0, molded case circuit breaker, 4-pole, 25 A, ETU560 electronic trip unit, line protection version, 187 kA breaking capacity at 240 V.","salesMarkdown":"At 690 V it still clears 3.8 kA, enough for most 690 V distribution. The ETU560 release gives you adjustable long-time delay (tr) from 0.5 to 25 seconds, plus adjustable N-conductor protection (OFF, 40% to 160%) — useful for sizing the neutral on 4-wire systems where harmonics or unbalanced loads are a concern. Communication function is built in, so it can talk to a BMS or SCADA without an add-on module. The 3VA2125-5JQ42-0AA0 measures 140 mm wide, 181 mm tall, and 86 mm deep — a 4-pole MCCB that fits standard SENTRON mounting plates and busbar systems.","metaTitle":"Siemens 3VA2125-5JQ42-0AA0 SENTRON MCCB, 25 A, 4-Pole, ETU56","metaDescription":"Siemens SENTRON 3VA2125-5JQ42-0AA0 molded case circuit breaker, 25 A rated current, 4-pole, ETU560 release, 187 kA at 240 V. 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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"76 kA","at 690 V":"3.8 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]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Communication Function":"Yes","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":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Summation current formation L + N conductor","Design of the overcurrent release":"ETU560","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 40% bis160%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"25","Adjustable response value time / tr min.":"0.5","Adjustable response value time / tsd max.":"0.5 s","Adjustable response value time / tsd min.":"0.05 s","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","Adjustable response value current / lg max.":"25 A","Adjustable response value current / lg min.":"15 A","Adjustable response value current / li max.":"300 A","Adjustable response value current / li min.":"38 A","Adjustable response value current / lr min.":"10 A","Adjustable response value current / tg max.":"0.8 s","Adjustable response value current / tg min.":"0.05 s","Adjustable response value current / Isd max.":"250 A","Adjustable response value current / Isd min.":"15 A","Ground fault protection can be switched ON/OFF":"Yes","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LSIG","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","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=436685&mlfb=3VA2125-5JQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5JQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"187 kA at 240 V, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 3.8 kA at 690 V. The high 240 V rating makes it suitable for high-fault applications like transformer secondary protection."},{"question":"Does the 25 A rating derate at higher ambient temperatures?","answer":"No derating needed — the 25 A rated continuous current holds flat from 40 °C through 70 °C. This simplifies panel design in hot environments."},{"question":"Where can I buy 3VA2125-5JQ42-0AA0 and how is it quoted?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or price is published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5JQ42-0AA0","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/3VA2125-5JQ42-0AA0 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}}