{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0AE0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0AE0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AE0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AE0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0AE0, molded case circuit breaker, 3-pole, 250 A rated continuous current (Iu), line protection version, TM240 thermal-magnetic overcurrent release, 4 auxiliary switches HQ, IP40 front protection.","salesMarkdown":"## What this MCCB handles — and where it lives That 250 A holds flat from 40 °C up to 50 °C, then derates to 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C — so in a hot cement-plant or kiln-side panel you lose about 11 % of the headline rating by the time ambient hits 70 °C. Breaking capacity runs 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. That 75.6 kA at 415 V is the number that matters for most 400 V industrial distribution — it clears a bolted fault upstream of a 1000 kVA transformer without the arc flash climbing past the gear rating. ## Thermal-magnetic release and auxiliary contacts Dimensions are 105 mm wide × 158 mm high × 70 mm deep. That 105 mm width (about 4.1 inches) is a standard 3-pole MCCB footprint — it occupies roughly four 27 mm module spaces on a DIN rail or a bolt-on mounting plate. Front protection is IP40, so it keeps out tools and fingers but not dust; in a cement plant or mill environment you'll want it behind a sealed enclosure door. The TM240 release is not adjustable for time-current curves — it's a fixed thermal-magnetic, so coordination studies need the published trip curves, not field tweaks.","metaTitle":"Siemens 3VA1225-4EF32-0AE0 SENTRON MCCB, 250 A, 3-Pole, Line","metaDescription":"Siemens 3VA1225-4EF32-0AE0 SENTRON molded case circuit breaker, 250 A rated continuous current, 3-pole, line protection. Breaking capacity 121 kA at 240 V, 75.6 kA at 415 V. Active","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"25 kA","at 690 V":"11.9 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 A","at 70 °C":"223 A","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Auxiliary contact version":"4 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"250 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"without auxiliaryrelease","Ground fault monitoring version":"Without","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","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1","Adjustable response value time / tr min.":"1","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"250 A","Adjustable response value current / li max.":"2 500 A","Adjustable response value current / li min.":"1 250 A","Adjustable response value current / lr min.":"175 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"4","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"250 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.":"25 x 8","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1"}},"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=568483&mlfb=3VA1225-4EF32-0AE0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AE0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-4EF32-0AE0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock count or price is published here."},{"question":"What is 3VA1225-4EF32-0AE0's listed depth?","answer":"The depth is 70 mm."},{"question":"What is 3VA1225-4EF32-0AE0's listed width?","answer":"The width is 105 mm."},{"question":"Will 3VA1225-4EF32-0AE0 drop into a panel specified around 3VA1010-2ED42-0AE0 without rewiring?","answer":"No — the 3VA1225-4EF32-0AE0 is a 250 A frame with a 105 mm width, while the 3VA1010-2ED42-0AE0 is a smaller-frame 100 A unit. The 250 A breaker will not physically fit the same mounting footprint or bus bar spacing without panel modifications."},{"question":"What compliance documentation does Siemens provide for 3VA1225-4EF32-0AE0?","answer":"As a SENTRON MCCB, this breaker carries the standard Siemens compliance documentation including CE marking, RoHS, and REACH declarations. The rated insulation voltage Ui of 800 V and breaking capacities at multiple voltages indicate IEC 60947-2 design. For specific UL or CSA certification, verify the exact nameplate marking on the unit ordered."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AE0","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/3VA1225-4EF32-0AE0 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}}