{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2450-5MN32-0AJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2450-5MN32-0AJ0","canonicalUrl":"https://aoctrl.com/siemens/3VA2450-5MN32-0AJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2450-5MN32-0AJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2450-5MN32-0AJ0 molded case circuit breaker, 500 A at 40 °C, 3-pole, 187 kA interrupting at 240 V, motor protection design.","salesMarkdown":"The Siemens SENTRON 3VA2450-5MN32-0AJ0 is a 3-pole molded case circuit breaker (MCCB) rated for 500 A continuous at 40 °C, with no derating needed up to 50 °C — it holds 500 A flat through that range. That means you can size the bus and terminations for a solid 500 A without worrying about ambient temperature creep in a typical enclosed panel. Above 50 °C it derates linearly to 480 A at 70 °C, which is the maximum operating ambient. The interrupting ratings tell the real story: 187 kA at 240 V, 121 kA at 415/440 V, and 75.6 kA at 500 V. ## Motor protection design — what that means in practice The product designation is motor protection, which means the trip curve and thermal memory are tuned for induction motor starting inrush and locked-rotor conditions. It includes phase failure detection — if one phase drops out, the breaker trips before single-phasing cooks the winding. That's a standard feature on this design, not an add-on. No undervoltage release is fitted; if you need UVR for a safety circuit, that's a separate order. The 138 mm width is for a 3-pole frame; if you're replacing an existing MCCB, check the mounting hole pattern and bus bar spacing against the cutout. This is a standard SENTRON 3VA2 frame size, so panel layouts designed for that family accept it without modification. ## Environmental limits and power loss Maximum power loss is 99 W at full rated current — that's heat that must be ventilated or conducted out of the enclosure. In a sealed panel with multiple breakers, the cumulative heat load matters; plan for forced ventilation if ambient inside the enclosure approaches 50 °C.","metaTitle":"Siemens SENTRON 3VA2450-5MN32-0AJ0 MCCB 500A 3P 187kA","metaDescription":"Siemens SENTRON 3VA2450-5MN32-0AJ0 molded case circuit breaker, 500A at 40°C, 3-pole, 187kA interrupting at 240V. Motor protection design with phase failure detection. Current life","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","Maximum":"13 s","Minimum":"4 s","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"9 kA","at 40 °C":"500 A","at 45 °C":"500 A","at 50 °C":"500 A","at 55 °C":"495 A","at 60 °C":"490 A","at 65 °C":"485 A","at 70 °C":"480 A","Depth [In]":"4.33 in","Width [In]":"5.43 in","Height [In]":"9.76 in","Limited To 1 S":"6 kA","Trip Indicator":"Yes","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":"Motor protection","Communication Function":"No","Phase Failure Detection":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"99 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2450-5MN32-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HP","Design Of The Auxiliary Release":"Without auxiliary release","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"500 A","Insulation Voltage / Rated Value":"800 V","adjustable trip class (Tc CLASS)":"10A, 10E, 20E","Design Of The Overcurrent Release":"ETU350M","protection class IP / on the front":"IP40","operating power / at AC-3 / at 230 V":"110 000 W","operating power / at AC-3 / at 400 V":"200 000 W","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"630 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569933&mlfb=3VA2450-5MN32-0AJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2450-5MN32-0AJ0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2450-5MN32-0AJ0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the interrupting rating of 3VA2450-5MN32-0AJ0 at 240 V?","answer":"187 kA at 240 V, which is the highest interrupting rating on this breaker. At 415 V and 440 V it's 121 kA, at 500 V it's 75.6 kA, and at 690 V it's 9 kA."},{"question":"Does 3VA2450-5MN32-0AJ0 include phase failure protection?","answer":"Yes, phase failure detection is built in as a standard feature of the motor protection design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2450-5MN32-0AJ0","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/3VA2450-5MN32-0AJ0 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}}