{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF42-0HH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF42-0HH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0HH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0HH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF42-0HH0, molded case circuit breaker, 4-pole, 250 A rated continuous current (Iu), 121 kA breaking capacity at 240 V, TM240 thermal-magnetic release, shunt trip (STL), line protection version.","salesMarkdown":"That 250 A holds flat from 40 °C through 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 (–). Breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 25 kA at 440 V, and 11.9 kA at 690 V. The 121 kA figure at 240 V means this breaker handles high-fault utility feeds or transformer secondaries without cascading upstream — common in North American 240 V delta or 277/480 V wye services where the available fault current at the panelboard exceeds 100 kA. At 415 V (typical IEC industrial), 75.6 kA covers most main and feeder applications. The 690 V rating at 11.9 kA is lower; verify SCCR if the line side is a 690 V transformer. Mount inside a panel with at least an IP54 enclosure if the environment is dirty or wet. ## Auxiliary and trip configuration The trip alarm switch (HQ) changes state only when the breaker trips on fault, giving a discrete signal distinct from the auxiliary position. This is a straight line-protection MCCB — thermal-magnetic only, no electronics, no metering. If you need ground-fault or phase-loss protection, it must be added externally. Dimensions: 140 mm wide, 158 mm high, 70 mm deep. The 140 mm width is standard for a 4-pole 250 A frame in the 3VA series — it occupies three 45 mm-wide modular positions plus one. The 70 mm depth includes the rear terminals; allow clearance for cable bending and the shunt trip wiring. Mounts via screw-clamp to a backplate or DIN-rail adapter (Siemens mounting kit). Latching endurance rated at 15 000 operations — mechanical life, not electrical. For frequent switching duty (motor starting or capacitor bank), consider a contactor instead; this MCCB is designed for infrequent isolation and fault protection.","metaTitle":"Siemens 3VA1225-4EF42-0HH0 SENTRON MCCB, 250 A, 4-Pole, 121","metaDescription":"Siemens SENTRON 3VA1225-4EF42-0HH0 molded case circuit breaker, 250 A rated continuous current, 4-pole, 121 kA at 240 V. Active production. Quoted to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"140 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":"Yes","Number of poles":"4","Product version":"Line protection","Voltage trigger":"Yes","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":"2 auxiliary switches + 1 trip alarm switch 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":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL30","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","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":"600 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":"3","Protective function of the overcurrent release":"LI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=568525&mlfb=3VA1225-4EF42-0HH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF42-0HH0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1225-4EF42-0HH0?","answer":"Submit an RFQ. This part is sourced to order through independent distribution; pricing and stock levels are confirmed at quote time. No public price or stock count is listed here."},{"question":"Will 3VA1225-4EF42-0HH0 drop into a panel that was specified around 3VA1010-2ED32-0JA0 without rewiring?","answer":"No. The 3VA1225-4EF42-0HH0 is physically larger (4-pole, 250 A frame) and has different terminal spacing and busbar connections than the smaller 3VA1010. Panel modifications and new busbars are required."},{"question":"What compliance documentation does this brand provide for 3VA1225-4EF42-0HH0 (RoHS, REACH, UL, IEC)?","answer":"Siemens provides RoHS and REACH declarations for the 3VA series, plus UL and IEC certification documents (IEC 60947-2, UL 489). Request the specific compliance pack with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF42-0HH0","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/3VA1225-4EF42-0HH0 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}}