{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1332-5MH32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1332-5MH32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1332-5MH32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1332-5MH32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1332-5MH32-0AA0, molded case circuit breaker, 3-pole, 320 A, TM120M thermal-magnetic overcurrent release, breaking capacity 187 kA at 240 V, IP40 front protection.","salesMarkdown":"The Siemens SENTRON 3VA1332-5MH32-0AA0 is a 3-pole molded case circuit breaker rated for a continuous 320 A — and it holds that full rating from 40 °C right through 50 °C ambient, which is the real-world panel temperature for most industrial switchboards. Above that, the thermal derating is modest: 313 A at 55 °C, 306 A at 60 °C, 299 A at 65 °C, 292 A at 70 °C. That means you can load it at nameplate in a ventilated enclosure without having to oversize the frame for ambient headroom. For a protection engineer, that is a deliberate choice: the trip curve is locked at the factory, eliminating the risk of a field-adjustment error that could mis-coordinate with downstream breakers. The trade-off is that you cannot re-range it for a different cable size or motor FLA without swapping the entire breaker. Breaking capacity is where this frame earns its place in a high-fault installation: 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. Those numbers cover most industrial LV distribution — 240 V single-phase taps, 400 V three-phase common in European and Asian plants, and 480/500 V North American services. Rated insulation voltage is 800 V, and the operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. The 3VA1332-5MH32-0AA0 measures 248 mm high, 138 mm wide, and 110 mm deep — a 3-pole frame. It mounts via screw-on lugs or a DIN-rail adapter plate; the 138 mm width fits a standard MCC bucket or panel cutout.","metaTitle":"Siemens 3VA1332-5MH32-0AA0 SENTRON MCCB, 320 A, 3-Pole, TM12","metaDescription":"Siemens SENTRON 3VA1332-5MH32-0AA0 molded case circuit breaker, 320 A rated, 3-pole, TM120M thermal-magnetic release. Breaking capacity 187 kA at 240 V. Active production. Quoted t","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","Maximum":"320 A","Minimum":"320 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]":"5.43 in","Height [In]":"9.76 in","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Starter 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":"TM120M","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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"I","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/5c3094d4ec58e38e8881e55718f88d8f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568991&mlfb=3VA1332-5MH32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1332-5MH32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What type of overcurrent release does this breaker use?","answer":"A TM120M thermal-magnetic release with fixed trip settings — no field adjustment, no interchangeable trip unit. The trip curve is factory-set."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1332-5MH32-0AA0","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/3VA1332-5MH32-0AA0 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}}