{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-7KP32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-7KP32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-7KP32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7KP32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-7KP32-0AA0, 3-pole molded case circuit breaker, 400 A rated continuous current (Iu), ETU850 electronic overcurrent release, line protection version.","salesMarkdown":"## What this 400 A MCCB does on your line At 240 V it can interrupt up to 330 kA of fault current; at 415 V and 440 V that drops to 242 kA, at 500 V to 187 kA, and at 690 V to 9 kA — so the voltage class of your distribution board determines which interrupting rating governs your coordination study. The ETU850 release gives you adjustable time-current curves (tr max 25 s) and a ground-fault detection option — though this specific variant ships without ground-fault monitoring. Communication and other measurement functions are built in, so it can talk to a higher-level control system for energy monitoring or remote trip indication. ## Temperature derating — don't spec the 400 A number alone Above that it derates linearly: 376 A at 55 °C, 352 A at 60 °C, 324 A at 65 °C, and 300 A at 70 °C. If your panel sits near a heat source or in a non-climate-controlled enclosure, use the derated figure — not the 400 A nameplate — for your load schedule. Maximum power loss is 63.3 W, so factor that into your enclosure ventilation. The breaker itself can operate between -40 °C and 70 °C ambient, and survive storage down to -40 °C and up to 80 °C. The case measures 248 mm high by 138 mm wide by 110 mm deep (9.8 × 5.4 × 4.3 inches).","metaTitle":"Siemens 3VA2440-7KP32-0AA0 SENTRON MCCB, 400 A, ETU850, 3-Po","metaDescription":"Siemens 3VA2440-7KP32-0AA0 SENTRON molded case circuit breaker, 400 A rated continuous current, 3-pole, ETU850 electronic trip unit. Breaking capacity 330 kA at 240 V. Current prod","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"138 mm","Height":"248 mm","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"376 A","at 60 °C":"352 A","at 65 °C":"324 A","at 70 °C":"300 A","Depth [in]":"4.3 in","Width [in]":"5.4 in","Height [in]":"9.8 in","Limited To 1 S":"5 kA","Number of poles":"3","Product version":"Line protection","lifecycle_stage":"current","Limited To 0.5 S":"5 kA","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"63.3 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"Yes","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU850","Protection class IP / on the front":"IP40","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.":"400 A","Adjustable response value current / li max.":"6 000 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"160 A","Adjustable response value current / Isd max.":"4 000 A","Adjustable response value current / Isd min.":"240 A","Neutral conductors / upgradeable/retrofittable":"Yes","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LSI","Switching capacity class of the circuit breaker":"C","Max. rated operational current of the frame size":"630 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/0eb36652ce522f093395d6bd0dd27e34.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=458815&mlfb=3VA2440-7KP32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7KP32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"At 240 V it interrupts 330 kA; at 415 V and 440 V it's 242 kA; at 500 V it's 187 kA; and at 690 V it's 9 kA. The voltage of your distribution system determines which rating governs your selectivity study."},{"question":"How do I get pricing and availability for this breaker?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through our independent distribution network — no stock figures or lead-time numbers are published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-7KP32-0AA0","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/3VA2440-7KP32-0AA0 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}}