{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-7MN32-0KF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-7MN32-0KF0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-7MN32-0KF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7MN32-0KF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-7MN32-0KF0, Molded case circuit breaker, Motor protection version, 3 poles, 400 A, ETU350M, 330 kA at 240 V.","salesMarkdown":"The Siemens SENTRON 3VA2440-7MN32-0KF0 is a 3-pole molded case circuit breaker rated for 400 A continuous current across the full ambient range from 40 °C up to 70 °C — no derating needed up to that ceiling. It's the motor-protection version with an ETU350M overcurrent release and built-in phase failure detection, so it's sized for a 400 A feeder or large motor branch circuit in a 480 V / 600 V class panel. The interrupting ratings climb to 330 kA at 240 V and hold at 242 kA through 440 V, then step to 187 kA at 500 V and 9 kA at 690 V. The case measures 138 mm wide, 248 mm high, and 110 mm deep — a standard SENTRON 3VA footprint that drops into the same mounting cutout as other 400 A frames in the series. Front IP40 protection covers the operator interface; the body is designed for DIN-rail or screw-mount panel installation with lug-type line and load connections. ## Release and protection parameters The ETU350M electronic trip unit offers adjustable short-time delay (tsd) from 0 s to a maximum setting, and adjustable response time (tr) with a minimum of 4 and maximum of 17 — these let the engineer coordinate with downstream breakers and upstream switchgear on a selective coordination study. The breaker draws a maximum power loss of 63.3 W at rated load, which matters for enclosure thermal rise calculations.","metaTitle":"3VA2440-7MN32-0KF0 SENTRON MCCB, 400 A, 3-pole, ETU350M","metaDescription":"Siemens SENTRON 3VA2440-7MN32-0KF0 molded case circuit breaker, 400 A continuous, 3-pole, ETU350M release, 330 kA at 240 V. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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":"400 A","at 60 °C":"400 A","at 65 °C":"400 A","at 70 °C":"400 A","Width [in]":"5.4 in","Height [in]":"9.8 in","Number of poles":"3","Product version":"Motor protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Communication Function":"No","Phase failure detection":"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":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU350M","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"4","Adjustable response value time / tsd max.":"0 s","Adjustable response value time / tsd min.":"0 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.":"6 000 A","Adjustable response value current / lr min.":"160 A","Adjustable response value current / Isd max.":"6 000 A","Adjustable response value current / Isd min.":"1 200 A","Neutral conductors / upgradeable/retrofittable":"No","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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1"}},"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=810440&mlfb=3VA2440-7MN32-0KF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7MN32-0KF0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3VA2440-7MN32-0KF0?","answer":"The closest functional peer is the 5SQ2370-2YA05, which shares the same 400 A, 3-pole, motor-protection class with an electronic trip unit. The 5SQ2370-2YA05 is a different mechanical frame — verify the mounting footprint and cutout dimensions before swapping. The 3VA2440-7MN32-0KF0 carries the SENTRON brand; the 5SQ2370 series is a separate product line with its own lug layout and accessory compatibility."},{"question":"Where can I buy 3VA2440-7MN32-0KF0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your target quantity and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-7MN32-0KF0","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/3VA2440-7MN32-0KF0 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}}