{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VM1225-4ED42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VM1225-4ED42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VM1225-4ED42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VM1225-4ED42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VM1225-4ED42-0AA0, molded case circuit breaker, 250 A rated at 40 °C, 4-pole, TM210 thermal-magnetic trip, 121 kA breaking capacity at 240 V AC.","salesMarkdown":"## SENTRON 3VM1225-4ED42-0AA0 — 250 A MCCB, Line Protection, TM210 Trip Breaking capacity is rated by system voltage: 121 kA at 240 V AC, 76 kA at 415 V AC, 53 kA at 440 V AC, and 17 kA at 500 V AC. It is a straightforward thermal-magnetic breaker — no auxiliaries, no shunt trip, no voltage-triggered accessories. Above that, the TM210 trip unit begins to derate: 243.3 A at 55 °C, 236.5 A at 60 °C, 229.8 A at 65 °C, and 223 A at 70 °C. For a panel OEM wireman, this means the breaker can be installed in a warm enclosure — up to 50 °C — without losing any ampacity. Above 50 °C, the derating curve is linear enough to calculate the effective rating for the actual ambient. Maximum power loss is 57 W. This is the heat the breaker dissipates at full rated current; it feeds into the enclosure thermal calculation. The DC rating of 500 V makes it usable in some DC distribution applications, though the breaking capacity in DC systems must be verified against the 3VA manual.","metaTitle":"Siemens 3VM1225-4ED42-0AA0 SENTRON MCCB, 250 A, 4-Pole, 121","metaDescription":"Siemens SENTRON 3VM1225-4ED42-0AA0 molded case circuit breaker, 250 A, 4-pole, 121 kA at 240 VAC. TM210 trip unit. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 mm","title":"3VM1225-4ED42-0AA0","Height":"158 mm","at 240 V":"121 kA","at 415 V":"76 kA","at 440 V":"53 kA","at 500 V":"17 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243.3 A","at 60 °C":"236.5 A","at 65 °C":"229.8 A","at 70 °C":"223 A","Depth [In]":"2.76 in","Width [In]":"5.51 in","Height [In]":"6.22 in","description":"circuit breaker 3VM1 IEC frame 250 breaking capacity class S Icu=36kA @ 415V 4-pole, line protection TM210, FTFM, In=250A overload protection Ir=250A, not adjustable short-circuit protection Ii=10 x In N conductor unprotected nut keeper kit","Trip Indicator":"No","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"TM210","Design Of Short-Circuit Protection":"For switching capacity values in DC power systems, see the 3VA Molded Case Circuit Breaker Manual; link available under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"Without","operating voltage / at AC / rated value":"690 V","Max. rated operational voltage Ue with DC":"500 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"No","Adjustable response value current / li max.":"2 500 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational voltage Ue with AC 50/60Hz":"500 V","Mechanical Service Life (Switching Cycles) / Typical":"15 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front connection"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/bfaa85f9e5b8d6ecb41e182dfa2de460.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580513&mlfb=3VM1225-4ED42-0AA0"},"ai":{"faq":[{"question":"What are the key ratings for 3VM1225-4ED42-0AA0?","answer":"Rated 250 A continuous at 40 °C, 4-pole, with a TM210 thermal-magnetic trip unit. Breaking capacity is 121 kA at 240 V AC, 76 kA at 415 V AC, 53 kA at 440 V AC, and 17 kA at 500 V AC. Rated insulation voltage is 800 V, max operational voltage 690 V AC or 500 V DC."},{"question":"What is the physical size of 3VM1225-4ED42-0AA0?","answer":"Width 140 mm, height 158 mm, depth 70 mm. The 140 mm width occupies four 35 mm DIN-rail module spaces."},{"question":"How do I get current pricing and availability for 3VM1225-4ED42-0AA0?","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 compliance documentation does Siemens provide for 3VM1225-4ED42-0AA0?","answer":"As a SENTRON series MCCB, the 3VM1225-4ED42-0AA0 carries CE marking for the European market and is designed to meet IEC 60947-2. UL and CSA listings are standard for the 3VM family; specific certification markings should be verified on the nameplate or declaration of conformity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VM1225-4ED42-0AA0","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/3VM1225-4ED42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}