{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-5FF42-0KH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-5FF42-0KH0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0KH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0KH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-5FF42-0KH0, molded case circuit breaker, 4-pole, 250 A rated continuous current Iu, TM240 thermal-magnetic overcurrent release, 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, 17 kA at 690 V.","salesMarkdown":"That 250 A holds flat from 40 °C through 50 °C ambient, 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 crowded panel running warm, you still have headroom down to 223 A before the thermal element starts to drift. The TM240 overcurrent release is a fixed thermal-magnetic unit, not electronic, meaning no auxiliary power draw and no programming; it trips on thermal overload and instantaneous magnetic short-circuit. The interrupting ratings are the main selection gate: 187 kA at 240 V, 121 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V. ## Built-in auxiliaries and release — one less thing to add That covers status feedback and remote trip indication without a separate add-on module. The shunt trip release (STL) is also integrated, so you can trigger a remote trip from a safety circuit or E-stop string. The auxiliary trip module is order code 3VA9688-0BL33. ## Physical fit — dimensions that matter for panel layout Width 140 mm, height 158 mm, depth 70 mm. The 140 mm width is the 4-pole frame; a 3-pole sibling in the same 250 A frame is narrower, but this one needs the extra pole space for the switched neutral. Mounting is via the standard 3VA base plate or DIN rail adapter — check the Siemens mounting kit for your enclosure backplate pattern. If you're looking at the 3VA1110-5EE32-0JA0 as a potential second-source or substitution, the key difference is frame size and current. The 3VA1110 is a 100 A, 3-pole MCCB on a smaller physical frame. The 3VA1225-5FF42-0KH0 is 250 A, 4-pole, and physically larger — it will not drop into a panel cutout or busbar arrangement drilled for the 100 A frame without rework. The interrupting ratings also differ: the 100 A frame typically carries lower SCCR values. If your BOM calls for 250 A feeder protection with a switched neutral, this is the correct frame; the 3VA1110 is for downstream subfeeds or smaller loads.","metaTitle":"Siemens 3VA1225-5FF42-0KH0 SENTRON MCCB, 250 A, 4-Pole, 187","metaDescription":"Siemens 3VA1225-5FF42-0KH0 SENTRON molded case circuit breaker, 250 A rated continuous current, 4-pole, TM240 trip, 187 kA SCCR at 240 V. Current production. Quoted to order.","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":"187 kA","at 415 V":"121 kA","at 440 V":"36 kA","at 690 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 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":"3VA9688-0BL33","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":"50%","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":"M","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=568735&mlfb=3VA1225-5FF42-0KH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-5FF42-0KH0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1225-5FF42-0KH0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the depth of 3VA1225-5FF42-0KH0?","answer":"The depth is 70 mm, which fits most 200 mm deep enclosures with clearance for the door."},{"question":"What is the width of 3VA1225-5FF42-0KH0?","answer":"The width is 140 mm, corresponding to the 4-pole frame size."},{"question":"Will 3VA1225-5FF42-0KH0 drop into a panel specified around 3VA1110-5EE32-0JA0?","answer":"No — the 3VA1225-5FF42-0KH0 is a 250 A, 4-pole MCCB on a larger frame (140 mm wide) than the 100 A, 3-pole 3VA1110-5EE32-0JA0. Panel cutout, busbar spacing, and mounting footprint are different; rewiring and re-drilling are required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-5FF42-0KH0","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/3VA1225-5FF42-0KH0 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}}