{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1332-5EF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1332-5EF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1332-5EF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1332-5EF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1332-5EF42-0AA0, Molded case circuit breaker, 4-pole, 320A at 40°C, TM240 overcurrent release, line protection, 187 kA breaking capacity at 240 V.","salesMarkdown":"It carries a 320 A rating at 40 °C ambient, sustained across 45 °C and 50 °C without derating — at 55 °C it still holds 313 A, dropping to 292 A at 70 °C. The TM240 overcurrent release combines a thermal-magnetic trip for overload and short-circuit protection. Four poles handle three-phase plus neutral switching, common in North American and IEC distribution schemes where a switched neutral is required downstream of the main disconnect. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 11.9 kA at 690 V. At 240 V that is high enough for most secondary-side fault scenarios without cascading upstream. Dimensions are 184 mm wide, 248 mm high, 110 mm deep. The width is the critical number for multi-breaker lineup spacing — 184 mm is a standard 4-pole MCCB footprint in the SENTRON 3VA platform. Front IP40 protection covers the operator interface; no IP rating on the sides or rear, so clearance to live parts inside the enclosure is assumed. Maximum power loss is 80.1 W. That is the heat the breaker dissipates at full rated current — factor it into enclosure thermal calculations, especially when mounting multiple breakers in a row.","metaTitle":"Siemens SENTRON 3VA1332-5EF42-0AA0 MCCB, 320A, 4-Pole, TM240","metaDescription":"Siemens SENTRON 3VA1332-5EF42-0AA0 molded case circuit breaker. 320A rated at 40°C, 4-pole, TM240 release. Breaking capacity 187kA at 240V. Active production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"0 A","Minimum":"0 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":"11.9 kA","at 40 °C":"320 A","at 45 °C":"320 A","at 50 °C":"320 A","at 55 °C":"313 A","at 60 °C":"306 A","at 65 °C":"299 A","at 70 °C":"292 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","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":"80.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"without","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","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/6c380c78bb27e2ff679e5d3212087890.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568988&mlfb=3VA1332-5EF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1332-5EF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at 240 V?","answer":"187 kA at 240 V, which covers high-fault-current scenarios typical at the secondary side of large distribution transformers without requiring upstream current-limiting fuses."},{"question":"What is the rated current of 3VA1332-5EF42-0AA0 at 40 °C?","answer":"320 A at 40 °C, and it holds 320 A through 50 °C ambient. Derating starts at 55 °C (313 A) down to 292 A at 70 °C."},{"question":"Where can I buy 3VA1332-5EF42-0AA0?","answer":"This part is sourced to order through independent distribution channels. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What compliance documentation does this brand provide?","answer":"Siemens SENTRON MCCBs typically carry UL, CSA, CE, and IEC certifications. Specific documentation (RoHS, REACH, declaration of conformity) is available from the manufacturer upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1332-5EF42-0AA0","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/3VA1332-5EF42-0AA0 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}}